| KINGDOM PLANTAE |
| DIVISION | CLASS | SUBCLASS | ORDER | FAMILY | GENUS | SPECIES | COMMON NAME | Before 6/13/10 | 6/13/2010 | WHERE? COMMENTS? |
| Bryophyta | Bryopsida | Bryidae | Bryales? | . | . | . | Moss #1 | 4/19/2009 | . | West of Mill River |
| . | . | . | . | . | . | . | Moss #2 | 4/19/2009 | . | Many places |
| . | . | . | Polytrichales | Polytrichaceae | Polytrichum | commune | Star Moss | 3/28/2010 | . | White Trail |
| Equisetophyta | Equisetopsida | . | Equisetales | Equisetaceae | Equisetum | arvense | Common Horsetail | 4/19/2009 | . | Inland from the dam |
| . | . | . | . | Lycopodiaceae | Huperzia | lucidula | Club moss | 4/19/2009 | . | . |
| . | . | . | . | . | Lycopodium | obscurum | Tree Club-moss | 4/19/2009 | . | . |
| . | . | . | Polypodiales | Dennstaedtiaceae | Dennstaedtia | punctilobula | Hay-scented Fen | . | 6/13/2010 | Orange Trail |
| . | . | . | . | Dryopteridaceae | Polystichum | acrostichoides | Christmas Fern | 4/19/2009 | 6/13/2010 | Inland from the dam, other places (4/19/2009); Orange Trail (6/13/2010) |
| . | . | . | . | . | Dryopteris | . | Shield Fern | 4/19/2009 | . | . |
| . | . | . | . | Osmundaceae | Osmunda | cinnamomea | Cinnamon Fern | 5/31/2009 | . | Red Circle |
| . | . | . | . | . | Osmunda | claytoniana | Interrupted Fern | 5/3/2009 | . | . |
| Pteridophyta | Filicopsida | . | . | Polypodiaceae | Polypodium | virginianum | Rocky Polypody | 4/19/2009 | 6/13/2010 | Orange Trail (6/13/2010) |
| . | . | . | . | Thelypterdaceae | Thelypteris | thelypteroides | New York Fern | 5/3/2009 | . | Seen on wildflower hike (maybe the White Trail west of the Tower Trail) |
| Coniferophyta | Pinopsida | . | Pinales | Cupressaceae | Juniperus | virginiana | Red Cedar | 4/19/2009 | 6/13/2010 | White Trail and Orange Trail (6/13/2010) |
| . | . | . | . | Pinaceae | Pinus | strobus | White Pine | 4/19/2009 | 6/13/2010 | Throughout the park |
| . | . | . | . | . | Tsuga | canadensis | Eastern Hemlock | 4/19/2009 | . | Yellow/Nature Trail, and by Whitney Avenue, mostly dying |
| Magnoliophyta | Liliopsida | Alismatidae | Alismatales | Alismataceae | Sagittaria | sp. | Arrowhead | . | 6/13/2010 | . |
| . | (Monocots) | Arecidae | Arales | Araceae | Arisaema | triphyllum | Jack-in-the-Pulpit | 5/3/2009 | 6/13/2010 | Throughout the Giant, various places |
| . | . | . | . | . | Symplocarpus | foetidus | Skunk Cabbage** | 4/19/2009 | 6/13/2010 | Green Trail below Haswell's Ledge; by Mill River; Orange Trail |
| . | . | Commelinidae | Commelinales | Commelinaceae | Commelina | communis | Asiatic Dayflower | 8/9/2008 | . | Seen on the White Trail on 8/9/08 but not reported since then |
| . | . | . | Cyperales | Cyperaceae | Carex | plantaginea | Plantainleaf Sedge | 4/19/2009 | . | . |
| . | . | . | . | . | Carex | pensylvanica | Pennsylvania sedge | 4/19/2009 | 6/13/2010 | Orange Trail (6/13/2010) |
| . | . | . | . | . | Carex | sp.(aquatilis or diandra) | Tussock Sedge | . | 6/13/2010 | Orange Trail (6/13/2010) |
| . | . | . | . | Poaceae | Anthoxanthum | odoratum | Sweet Vernal Grass | 4/19/2009 | . | . |
| . | . | . | . | . | Danthonia | spicata | Poverty Danthonia, Poverty Oatgrass | 4/19/2009 | . | . |
| . | . | . | . | . | Schizachyium | scoparium | Little Bluestem | 4/19/2009 | . | . |
| . | . | . | . | Iridaceae | Iris | pseudacorus | Pale Yellow Iris, Yellow Flag | 4/19/2009 | . | Near Mill Rivesr |
| . | . | . | . | . | Iris | versicolor | Larger Blueflag | 5/25/2009 | . | Red Circle Trail |
| . | . | . | . | . | Iris | virginica | Southern Blueflag | 5/25/2009 | . | Red Circle Trail |
| . | . | . | . | . | Sisyrinchium | atlanticum | Eastern Blue-eyed Grass | 5/29/2010 | . | Yellow-Green Crossover (section 4). Image: |
| . | . | . | . | . | Sisyrinchium | montanum | Strict Blue-eyed Grass | 5/1/2010 | . | . |
| . | . | . | . | . | Sisyrinchium | mucronatum | Needle-tip Blue-eyed Grass | 6/6/2009 | June, 2010 | Red Square Trail (6/6/09); Quarry (June, 2010) |
| . | . | . | . | Liliaceae | Allium | canadense | Wild Garlic | 6/7/2009 | . | Blue Trail |
| . | . | . | . | . | Allium | cepa | Top Onion (Tree Onion) | . | 6/13/2010 | . |
| . | . | . | . | . | Allium | tricoccum | Wild Leek** | 4/19/2010 | . | . |
| . | . | . | . | . | Erythronium | americanum | Trout Lily (Adder's Tongue, | 4/19/2009 | . | Yellow/Nature Trail, Violet trailhead, many other places |
| . | . | . | . | . | Hypoxis | hirsuta | Eastern Yellow Stargrass | 5/3/2009 | 6/13/2010 | White Trail (5/3/09); Yellow Trail near Y/G crossover (6/13/10). Image: |
| . | . | . | . | . | Maianthemum | canadense | Common Lily-of-the-valley** (Canada Mayflower) | 4/19/2009 | 6/13/2010 | Yellow-Green Crossover, many other places |
| . | . | . | . | . | Maianthemum | racemosum | False Solomon's Seal** | 4/19/2009 | 6/13/2010 | Yellow Trail, by dam, many other places |
| . | . | . | . | . | Polygonatum | biflorum | Solomon's Seal** | 4/19/2009 | 6/13/2010 | Yellow Trail, many places |
| . | . | . | . | . | Polygonatum | pubescens | Hairy Solomon's Seal** | 4/19/2009 | . | . |
| . | . | . | . | . | Uvularia | sessilifolia | Wild Oats (Sessile Bellwort)** | 4/19/2009 | . | . |
| . | . | . | . | . | Hemerocallis | fulva | Day Lily** | 4/19/2009 | . | Violet Trailhead |
| . | . | . | . | . | Veratrum | viride | False Hellebore** | 4/19/2009 | 6/13/2010 | Green Trail below Haswell's Ledge, bank of Mill River (4/19/2010); Orange Trail (6/13/2010) |
| . | . | . | . | Smilacaceae | Smilax | rotundifolia | Common Greenbriar (Roundleaf Greenbriar) | 4/19/2009 | 6/13/2010 | Yellow Trail, Nature Trail |
| . | . | . | . | . | Trillium | erectum | Red Trillium** | 4/19/2009 | . | Green Trail below Haswell's Ledge |
| . | . | . | . | . | Trillium | grandifloum | Large- Flowered or White Trillium | 4/19/2009 | . | . |
| . | . | . | Orchidales | Orchidaceae | Cypripedium | acaule | Pink Lady Slipper (Moccasin Flower) | 5/1/2010 | 6/13/2010 | On various trails in the Giant |
| . | . | . | . | . | Goodyera | sp. | Rattlesnake Plantain | 9/5/09;6/12/10 | . | 9/5/09: Red Diamond Trail, not far from the north trailhead; 6/12/10: Violet Trail |
| . | Magnoliopsida | Caryophyllidae | Caryophyllales | Caryophyllaceae | Dianthus | armeria | Deptford Pink Dianhus | 7/5/2009 | . | Violet Trail near the old quarry works |
| . | (dicots) | . | . | . | Saponaria | officinalis | Bouncing Bet | 8/1/2009 | . | Quarry |
| . | . | . | . | . | Stellaria | media | Common Chickweed ** | 4/19/2009 | . | . |
| . | . | . | Polygonales | Polygonaceae | Polygonum | caespitosum | Bristled Knotweed | 6/16/2009 | . | White Trail |
| . | . | . | . | . | Polygonum | cuspidatum | Japanese Knotweed | . | 6/13/2010 | Red Diamond/Red Hexagon south of Tuttle Avenue |
| . | . | . | . | . | Rumex | crispus | Yellow Dock | 4/19/2009 | . | west of Mill River |
| . | . | Hamamelidae | Fagales | Betulaceae | Betula | alleghaniensis | Yellow Birch | 4/19/2009 | . | Yellow Trail/Nature Trail; near Mill River; quarry |
| . | . | . | . | . | Betula | lenta | Black Birch (Sweet Birch) | 4/19/2009 | 6/13/2010 | many places |
| . | . | . | . | . | Betula | papyrifera | White Birch | 4/19/2009 | 6/13/2010 | Orange Trail 2010; Chestnut Lane (6/13/2010) |
| . | . | . | . | . | Carpinus | orbiculatus | American Hornbeam (Ironwood) | . | 6/13/2010 | Orange Trail |
| . | . | . | . | . | Corylus | cornuta | Beaked Hazel, Western Hazel | 4/19/2009 | . | . |
| . | . | . | . | . | Betula | populifolia | Gray Birch | 4/19/2009 | . | . |
| . | . | . | . | . | Ostrya | virginiana | Eastern Hophornbeam | 4/19/2009 | 6/13/2010 | . |
| . | . | . | . | Fagaceae | Castanea | dentata | American Chestnut | 4/19/2009 | . | . |
| . | . | . | . | . | Fagus | grandifolia | American Beech | 4/19/2009 | 6/13/2010 | Yellow Trail, many places |
| . | . | . | . | . | Quercus | alba | White Oak | 4/19/2009 | 6/13/2010 | Violet Trailhead; Orange Trail (6/13/2010) |
| . | . | . | . | . | Quercus | coccinea | Scarlet Oak | . | 6/13/2010 | . |
| . | . | . | . | . | Quercus | ellipsoidalis | Northern Pin Oak | . | 6/13/2010 | . |
| . | . | . | . | . | Quercus | ilicifolia | Scrub Oak** | 4/19/2009 | 6/13/2010 | Yellow Trail, west of Yellow-Green Crossover |
| . | . | . | . | . | Quercus | prinus | Chestnut Oak | 4/19/2009 | 6/13/2010 | Orange Trail (6/13/2010) |
| . | . | . | . | . | Quercus | rubra | Northern Red Oak | 4/19/2009 | 6/13/2010 | Violet Trailhead; Orange Trail (6/13/2010) |
| . | . | . | . | . | Quercus | velutina | Black Oak | 4/19/2009 | 6/13/2010 | . |
| . | . | . | Hamamelidales | Hamamelidaceae | Hamamelis | virginiana | Common Witch-hazel ** | 4/19/2009 | 6/13/2010 | Yellow Trail, many places; Intersection of Orange Trail and Tower Trail on 6/13/2010 |
| . | . | . | . | . | Platanus | occidentalis | American Sycamore | 4/19/2009 | . | Seed pods only |
| . | . | . | Juglandales | Juglandaceae | Carya | alba | Mockernut Hickory | 4/19/2009 | 6/13/2010 | . |
| . | . | . | . | . | Carya | cordiformis | Bitternut Hickory | 4/19/2009 | 6/13/2010 | . |
| . | . | . | . | . | Carya | glabra | Pignut Hickory | 4/19/2009 | 6/13/2010 | . |
| . | . | . | . | . | Carya | ovata | Shagbark Hickory | 4/19/2009 | 6/13/2010 | Yellow Trail/Nature Trail; Orange Trail (6/13/2010) |
| . | . | . | Urticales | Moraceae | Morus | alba | White Mulberry | 4/19/2009 | . | . |
| . | . | Magnoliidae | Laurales | Lauraceae | Lindera | benzoin | Spicebush*** | 4/19/2009 | 6/13/2010 | Yellow Trail and Green Trail; Violet Trailhead and dam; Orange Trail (6/13/2010) |
| . | . | . | . | . | Sassafras | albidum | White Sassafras | 4/19/2009 | 6/13/2010 | Off Red Triangle, north of Green Trail |
| . | . | . | Magnoliales | Magnoliaceae | Liriodendron | tulipifera | Tulip Tree | 4/19/2009 | 6/13/2010 | Green Trail, near Red Triangle; Orange Trail (6/13/2010) |
| . | . | . | Nymphaeales | Nymphaeceae | Nymphaea | . | Water Lily | . | 6/13/2010 | Mill River |
| . | . | . | Papaverales | Fumariaceae | Corydalis | sempervirens | Pale Pink Corydalis (Rock Harlequin) | 5/1/2010 | 6/13/2010 | . |
| . | . | . | . | Papaveraceae | Chelidonium | majus | Greater Celandine ** | 4/19/2009 | 6/13/2010 | Near roadway northeast of Ranger's Shed |
| . | . | . | . | . | Stylophorum | diphyllum | Celandine Poppy | 5/3/2009 | . | Edge of the picnic area, near the Ranger's Shed |
| . | . | . | . | . | Dicentra | cucullaria | Dutchman's-Britches** | 4/19/2009 | . | Throughout the Park |
| . | . | . | . | . | Sanguinaria | canadensis | Bloodroot** | 4/19/2009 | 6/13/2010 | Yellow-Green Crossover, north of Yellow Trail, and Tower Path; Blue Trail; Red Hexagon Trail |
| . | . | . | . | . | Corydails | sempervirens | Pale Corydalis** | 4/19/2009 | 6/13/2010 | On Nature Trail, near #30 |
| . | . | . | Ranunculales | Berberidaeae | Berberis | thunbergii | Japanese Barberry | 4/19/2009 | 6/13/2010 | All over the Park, invasive |
| . | . | . | . | Ranunculaceae | Actaea | pachypoda | White Baneberry/Doll's Eyes | 10/12/2009 | . | Whit Trail |
| . | . | . | . | . | Actaea | rubra | Red Baneberry | 5/3/2009 | . | Picnic area (I think) |
| . | . | . | . | . | Actaea | spicata | Red Baneberry | . | 6/20/2010 | Violet Trail near the old quarry works |
| . | . | . | . | . | Anemone | virginiana | Tall Thimbleweed | . | 6/13/2010 | Tower Trail |
| . | . | . | . | . | Anemonella | thalictroides | Rue-Anemone** | 4/19/2009 | . | Yellow-Green Crossover; White Trail; other places |
| . | . | . | . | . | Aquilegia | canadensis | Columbine** | 4/19/2009 | . | Huge new patch seen on 5/3/2009 in the quarry! |
| . | . | . | . | . | Caltha | palustris | Marsh Marigold** | 4/19/2009 | . | Off Green Trail, east of Red Triangle; near Mill River (east side?) |
| . | . | . | . | . | Coptis | laciniata | Gold Thread | 4/19/2009 | . | . |
| . | . | . | . | . | Hepatica | americana | Round-lobed Hepatica** | 4/19/2009 | . | White Trail, just off Tower Path |
| . | . | . | . | . | Ranunculus | arbortivus | Kidneyleaf Crowfoot (Smallflower Crowfoot) | 4/19/2009 | . | Green Trail, below Haswell's Ledge; Red Circle Trail |
| . | . | . | . | . | Ranunculus | acris | Tall Buttercup | 5/23/2010 | . | White Trail |
| . | . | . | . | . | Ranunculus | hispidus | Hispid/Swamp Buttercup | 5/25/2009 | . | Red Hexagon Trail |
| . | . | . | . | . | Ranunculus | recurvatus | Hooked Crowfoot | 5/10/2009 | . | Orange Trail |
| . | . | . | . | . | Thalictrum | sp. | Meadow Rue | . | 6/13/2010 | . |
| . | . | . | . | . | Caulophyllum | thalictroides | Blue Cohosh** | 4/19/2009 | . | Green Trail below Haswell's Ledge; near Mt. Carmel Avenue |
| . | . | . | . | . | Podophyllum | peltatum | May Apple | 5/3/2009 | . | Red Diamond Trail, just south of the intersection with the Blue Trail |
| . | . | Dilleniidae | Capparales | Brassicaceae (Cruciferae) | Alliaria | petiolata | Garlic Mustard ** | 4/19/2009 | 6/13/2010 | Throughout the Park, invasive |
| . | . | . | . | . | Capsella | bursa-pastoris | Shepherd's Purse ** | 4/19/2009 | 6/13/2010 | . |
| . | . | . | . | . | Arabis | laevigata | Smooth Rock Cress** | 4/19/2009 | . | Yellow Trail and Tower Path |
| . | . | . | . | . | Dentaria | laciniata | Cut-leaved Toothwort** | 4/19/2009 | . | Just off Tower Path, ~100' from parking area |
| . | . | . | . | . | Cardamine | pensylvanica | Pennsylvania Bittercress** | 4/19/2009 | 6/13/2010 | On Nature Trail, near #30 (4/19/09); Yellow Trail (6/13/10) |
| . | . | . | . | . | Hesperis | matronalis | Dame's Rocket | 5/25/2009 | . | Violet Trail |
| . | . | . | . | . | Rorippa | nasturtium-aquaticum? | Watercress | 5/23//2010 | . | Violet Trail |
| . | . | . | Ericales | Ericaceae | Chimaphila | maculata | Spotted Wintergreen | . | 6/13/2010 | Blue Trail, Yellow Trail |
| . | . | . | . | . | Gaylussacia | baccata | Black Huckleberry*** | 4/19/2009 | . | . |
| . | . | . | . | . | Kalmia | latifolia | Mountain Laurel** | 4/19/2009 | 6/13/2010 | Yellow Trail/Green Trail, many places |
| . | . | . | . | . | Rhododendron | periclymenoides | Pink Azalea | 5/27/2007 | . | Blue Trail (not reported since 2007) |
| . | . | . | . | . | Vaccinium | corymbosum | Highbush Blueberry | 4/19/2009 | . | Blue Trail (on 7/26/08) |
| . | . | . | . | . | Vaccinium | pallidum | Lowbush Blueberry | 4/19/2009 | 6/13/2010 | Orange Trail (6/13/2010) |
| . | . | . | . | . | Vaccinium | vacillans | Early Low Blueberry | . | 6/13/2010 | Nature Trail |
| . | . | . | . | Monotropaceae | Monotropa | hypopithys | Pinesap | 9/20/1998 | . | . |
| . | . | . | . | . | Monotropa | uniflora | Indian-pipe** | 4/19/2009 | 6/13/2010 | Yellow Trail, west of Red Triangle Trail; throughout the Giant |
| . | . | . | . | Pyrolaceae | Chimaphila | maculata | Striped Prince's Pine (Pipsissewa, Spotted Wintergreen) | 4/19/2009 | 6/13/2010 | West of the Mill River; Orange Trail (6/13/2010) |
| . | . | . | . | . | Pyrola | americana | American Wintergreen** | 4/19/2009 | 6/13/2010 | West of the Mill River; Orange Trail |
| . | . | . | . | . | Pyrola | rotundifolia | Round-leaved Pyrola | . | 6/13/2010 | Yellow Trail |
| . | . | . | Primulales | Primulaceae | Trientalis | borealis | Starflower | 4/19/2009 | 6/13/2010 | Below Pavilion |
| . | . | . | . | . | Lysimachia | quadrifolia | Whorled Loosestrife** | 4/19/2009 | 6/13/2010 | Yellow Trail, west of Yellow-Green Crossover (4/19/09); Nature Trail (6/13/10) |
| . | . | . | . | . | Lysimachia | terrestris | Earth Loosestrife | . | 6/13/2010 | Orange Trail |
| . | . | . | Salicales | Salicaceae | Populus | grandidentata | Bigtooth Aspen | . | 6/13/2010 | . |
| . | . | . | . | . | Populus | tremuloides | Quaking Aspen | 5/3/2009 | . | Quarry |
| . | . | . | Theales | Clusiaceae | Hypericum | perforatum | Common St. Johnswort | 7/5/2009 | . | . |
| . | . | . | Violales | Cistaceae | Helianthemum | canadensse | Frostweed | 6/26/2009 | . | White Trail |
| . | . | . | . | Violaceae | Viola | cucullata | Marsh Blue Violet | 5/25/2009 | . | Orange Trail |
| . | . | . | . | . | Viola | fimbriatula | Northern Downy Violet** (Arrow-leafed Violet) | 4/19/2009 | . | White Trail in spring of 2010 |
| . | . | . | . | . | Viola | macloskeyi | White Violet | 4/24/2010 | . | . |
| . | . | . | . | . | Viola | palmata | Early Blue Violet (Wood Violet)*** | 4/19/2009 | . | West of Mill River |
| . | . | . | . | . | Viola | papilionacea | Common Blue Violet** | 4/19/2009 | . | Many, on the stair bottom byo the Mill River |
| . | . | . | . | . | Viola | pedata | Birdfoot Violet | 4/18/10;5/1/10 | . | Blue Trail on 4/18/10 |
| . | . | . | . | . | Viola | pubescens | Downy Yellow Violet | 4/25/2010 | . | Violet Trail (appropriately) |
| . | . | . | . | . | Viola | rotundifolia | Round-leaved Yellow Violet (Stemless)*** | 4/19/2009 | . | Green Trail below Haswell's Ledge; Orange Trail |
| . | . | . | . | . | Viola | septentrionalis | Northern Blue Violet*** | 4/19/2009 | . | Yellow Trail, many places |
| . | . | . | . | . | Viola | sororia | Wooly (Common) Blue Violet*** | 4/19/2009 | . | . |
| . | . | Rosidae | Apiales | Apiaceae | Cicuta | maculata | Water Hemlock | . | 6/13/2010 | Off Violet Trail below Dam on Mill River |
| . | . | . | . | . | Cryptotaenia | canadensis | Honewort | . | 6/13/2010 | Yellow Trail |
| . | . | . | . | . | Daucus | carrota | Queen Anne's Lace | 8/1/2007 | . | Blue Trail (not reported since 2007) |
| . | . | . | . | . | Osmorhiza | berteroi | Sweet cicely | . | 6/13/2010 | . |
| . | . | . | . | . | Sanicula | marilandica | Black Snakeroot | . | 6/13/2010 | Nature Trail |
| . | . | . | . | Araliaceae | Aralia | nudicaulis | Wild Sasparilla | 4/26/2009 | 6/13/2010 | Cross-country ski trail parallel to Red Circle; Orange Trail (6/13/2010) |
| . | . | . | . | . | Aralia | spinosa | Devil's walkingstick (Hercules's club) | 6/21/2009 | . | South edge of the quarry, shortly after the State crew came through and cut almost everything down |
| . | . | . | . | . | Panax | trifolius | Dwarf Ginseng** | 4/19/2009 | . | Green Trail below Haswell's Ledge; by first vernal pool off Blue Trail, near Red Circle |
| . | . | . | Celastrales | Aquifoliaceae | Ilex | verticillata | Common Winterberry | . | 6/13/2010 | Off Violet Trail below Dam on Mill River |
| . | . | . | . | Celastraceae | Celastrus | orbiculatus | Asiatic Bittersweet | . | 6/13/2010 | Yellow Trail; Orange Trail |
| . | . | . | . | . | Celastrus | scandens | Climbing Bittersweet | 11/27/2008 | . | Quarry, not reported since 2008 |
| . | . | . | . | . | Euonymus | alatus | Burningbush (Winged Euonymus)*** | 4/19/2009 | 6/13/2010 | Yellow Trail at Yellow/Green Connector, invasive; Red Hexagon |
| . | . | . | . | . | Euonymus | europaeus | European Euonymus | 4/19/2009 | 6/13/2010 | . |
| . | . | . | Cornales | Cornaceae | Cornus | florida | Flowering Dogwood | 4/19/2009 | 6/13/2010 | Yellow Trail and Nature Trail; Orange Trail (6/13/2010) |
| . | . | . | Euphorbiales | Euphorbiaceae | Euphorbia | esula | Leafy Cypress Spurge | 5/31/2010 | . | Quarry |
| . | . | . | Fabales | Fabaceae | Amphicarpaea | bracteata | American Hog-peanut | . | 6/13/2010 | Nature Trail; Orange Trail |
| . | . | . | . | . | Desmodium | nudiflorum | Nakedflower Ticktrefoil | 8/16/2009 | . | . |
| . | . | . | . | . | Lotus | corniculatus | Birdsfoot Trefoil | 8/10/2008 | . | Not reported since 2008 |
| . | . | . | . | . | Trifolium | aureum | Hop Clover (Golden Clover) | 7/5/2009 | . | . |
| . | . | . | . | . | Trifolium | pratense | Red Clover | 5/30/2009 | . | Blue Trail |
| . | . | . | . | . | Trifolium | repens | White Clover | . | 6/13/2010 | Near roadway northeast of Ranger's Shed |
| . | . | . | Geraniales | Balsaminaceae | Impatiens | capensis | Spotted Touch-me-not** (Jewelweed) | 4/19/2009 | 6/13/2010 | Orange Trail (6/13/2010) |
| . | . | . | . | Clethraceae | Clethra | alnifolia | Sweet Pepperbush | 4/19/2009 | . | Green Trail, east of Yellow-Green Connector |
| . | . | . | . | Geraniaceae | Geranium | maculatum | Wild Geranium** | 4/19/2009 | 6/13/2010 | Tower Trail? (4/19/09), Nature Trail (6/13/10) |
| . | . | . | . | . | Geranium | robertianum | Herb-Robert** | 4/19/2009 | 6/13/2010 | Green Trail, below Haswell's Ledge; Tower Path |
| . | . | . | . | Oxalidaceae | Oxalis | stricta | Yellow Wood Sorrel*** | 4/19/2009 | 6/13/2010 | Near roadway northeast of Ranger's Shed |
| . | . | . | Myrtales | Onagraceae | Circaea | alpina | Enchanter's Nightshade | . | 6/13/2010 | Near roadway northeast of Ranger's Shed |
| . | . | . | Rhamnales | Elaeagnaceae | Elaeagnus | umbellata | Autumn Olive | 4/19/2009 | . | Quarry, other places in the Giant |
| . | . | . | . | Vitaceae | Parthenocissus | quinquefolia | Virginia Creeper (Woodbine) | 4/19/2009 | 6/13/2010 | Yellow Trail, other places in the Giant |
| . | . | . | . | . | Vitis | sp. | Grape sp. | 4/19/2009 | 6/13/2010 | Green Trail in 2007 and 2008 |
| . | . | . | . | . | Vitis | labrusca | Fox Grape | 4/19/2009 | . | West of the Mill River |
| . | . | . | Rosales | Rosaceae | Agrimonia | . | Agrimony | 4/19/2009 | . | . |
| . | . | . | . | . | Fragaria | virginiana | Wild Strawberry | 4/16/2010 | . | Quarry |
| . | . | . | . | . | Photinia | pyrifolia | Red Chokeberry | 5/1/2010 | . | White Trail |
| . | . | . | . | . | Potentilla | intermedia | Intermediate Cinquefoil | 6/7/2009 | . | White Trail |
| . | . | . | . | . | Potentilla | recta | Rough-fruited Cinquefoil | . | 6/23/2010 | Quarry, Violet Trail |
| . | . | . | . | . | Potentilla | simplex | Common Cinquefoil | 5/23/2009 | . | Blue Trail |
| . | . | . | . | . | Prunus | virginiana | Chock Cherry (Cinquefoil) | 5/10/2009 | 6/13/2010 | Orange Trail (5/10/09); Nature Trail (6/13/10) |
| . | . | . | . | . | Rosa | carolina | Carolina Rose (Pasture rose) | 6/21/2009 | 6/13/2010 | North end of the quarry, 6/13/10 on the White Trail and Orange Trail |
| . | . | . | . | . | Rosa | multiflora | Multiflora Rose (invasive in CT) | . | 6/13/2010 | Orange Trail |
| . | . | . | . | . | Rubus | glaucus | Wild Raspberry | . | 6/13/2010 | . |
| . | . | . | . | . | Rubus | odoratus | Purple-flowering Raspberry** | 4/19/2009 | 6/13/2010 | Tower Path and Red Hexagon Trail |
| . | . | . | . | . | Rubus | sp. | Blackberry sp. | 4/19/09;5/23/10 | 6/13/2010 | Red SquareTrail (and White Trail on 5/23/10); Yellow Trail (6/13/10) |
| . | . | . | . | . | Spiraea | alba | White Spiraea (White Meadowsweet) | 5/3/2009 | . | Quarry |
| . | . | . | . | Saxifragaceae | Saxifraga | virginiensis | Early Saxifrage** | 4/19/2009 | 6/13/2010 | Yellow-Green Crossover, Tower Path; Orange Trail (6/13/2010) |
| . | . | . | . | . | Chrysosplenium | aqmericanum | American Golden Saxifrage | 4/19/2009 | . | . |
| . | . | . | Sapindales | Aceraceae | Acer | platanoides | Norway Maple | 4/19/2009 | . | . |
| . | . | . | . | . | Acer | rubrum | Red Maple*** | 4/19/2009 | . | All over stone walls |
| . | . | . | . | . | Acer | saccharum | Sugar Maple | 4/19/2009 | 6/13/2010 | Orange Trail (6/13/2010) |
| . | . | . | . | Anacardiaceae | Rhus | hirta | Staghorn Sumac | 4/19/2009 | 6/13/2010 | . |
| . | . | . | . | . | Toxicodendron | radicans | Poison Ivy | 4/19/2009 | 6/13/2010 | Yellow Trail east of parking area |
| . | . | . | . | Staphyleaceae | Staphylea | trifolia | American Bladdernut | . | 6/13/2010 | Yellow Trail |
| . | . | Asteridae | Asterales | Asteraceae | Ambrosia | sp. | Ragweed | . | 6/13/2010 | Along Mt. Carmel Avenue/Mill River area |
| . | . | . | . | . | Antennaria | neglecta | Field Pussytoes** | 4/19/2009 | . | . |
| . | . | . | . | . | Antennaria | plantaginifolia | Plantain-leaved Pussytoes** | 4/19/2009 | . | . |
| . | . | . | . | . | Arctium | minus | Common Burdock** | 4/19/2009 | 6/13/2010 | . |
| . | . | . | . | . | Artemisia | vulgaris | Mugwort | 4/19/2009 | 6/13/2010 | Near roadway northeast of Ranger's Shed |
| . | . | . | . | . | Aster | divaricatus | White Wood Aster | 4/19/2009 | . | Team 1 wrote "c.f.", Sweeney identified only the genus |
| . | . | . | . | . | Aster | vimineus | Small White Aster** | 4/19/2009 | . | . |
| . | . | . | . | . | Bidens | laevis | Bur-Marigold (Sticktight; Smooth Beggartick) | 8/16/2009 | . | . |
| . | . | . | . | . | ?. | . | Daisy | . | 6/13/2010 | . |
| . | . | . | . | . | Cichorium | intybus | Chicory | . | 6/13/2010 | Near the parking lot by the park entrance |
| . | . | . | . | . | Cirsium | . | Thistle | . | 6/13/2010 | . |
| . | . | . | . | . | Erigeron | annuus | Eastern Daisy Fleabane | 6/6/2009 | . | . |
| . | . | . | . | . | Eurybia | divaricata | White Wood Aster | . | 6/13/2010 | . |
| . | . | . | . | . | Helianthus | divaricatus | Woodland Sunflower | . | 6/13/2010 | Nature Trail |
| . | . | . | . | . | Hieracium | aurantiacum | Orange Hawkweed | 5/24/2008 | . | Not reported since 2008 |
| . | . | . | . | . | Hieracium | caespitosum | Field Hawkweed (Meadow Hawkweed) | 5/25/2009 | . | . |
| . | . | . | . | . | Hieracium | x floribundum | Pale Hawkweed | 5/29/2010 | . | White Trail (right foot). Image: |
| . | . | . | . | . | Hieracium | paniculum | Panicled Hawkweed | . | 6/13/2010 | Nature Trail |
| . | . | . | . | . | Hieracium | pilosella | Mouse-eared Hawkweed | 5/29/2010 | . | White Trail (near Hezekiah's Knob). Image: |
| . | . | . | . | . | Hieracium | venosum | Rattlesnake-weed** | 4/19/2009 | 6/13/2010 | Nature Trai (2009)l, White Trail near right knee (2010). Image: |
| . | . | . | . | . | Ionactis | linariifolius | Stiff Aster? Savoryleaf Aster (Flaxleaf Whitetop Aster) | 5/3/2009 | 6/13/2010;6/18/10 | Quarry on 5/3/09; Tower Trail on 6/13/10; White Trail on 6/18/10 |
| . | . | . | . | . | Krigia | virginica | Dwarf Dandelion | 5/11/2010 | . | . |
| . | . | . | . | . | Lactuca | sp. | Lettuce | . | 6/13/2010 | Along Mt. Carmel Avenue/Mill River area |
| . | . | . | . | . | Lactuca | hirsuta | Hairy Lettuce | . | 6/13/2010 | Tower Trail? |
| . | . | . | . | . | Leucanthemum | vulgare | Ox-eye Daisy | 6/6/2009 | . | . |
| . | . | . | . | . | Pilosella x floribunda | . | Pale Hawkweed | 5/29/2010 | . | Whit Trail (NOTE: This hybrid is thought to be a cross between Hieracium caespitosum x Hieracium lactucella (Field Hawkweed and European Hawkweed, respectively) |
| . | . | . | . | . | Solidago | sp. | . | 4/19/2009 | . | . |
| . | . | . | . | . | Symphyotrichum | patens | Late Purple Aster | 9/20/2008 | . | Not reported since 2008 |
| . | . | . | . | . | Taraxacum | officinale | Common Dandelion** | 4/19/2009 | . | . |
| . | . | . | Campanulales | Campanulaceae | Campanula | rotundifolia | Roundleaf Harebell (Bluebell) | 7/16/2008; 6/12/2010 | . | White Trail (7/16/2008); Hezekiah's Knob (6/12/2010). Image: |
| . | . | . | . | . | Lobelia | cardinalis | Cardinal Flower | 7/22/2010 | . | Mill River (near dam?). Image: |
| . | . | . | . | . | Lobelia | inflata | Indian Tobacco | 7/19/2009 | . | Orange Trail |
| . | . | . | . | . | Triodanis | perfoliata | Venus Looking Glass | 6/2/2010 | . | Hezekiah's Knob, heading east on Blue past intersection with White. Image: (also white variant on Orange near Red Triangle); Blue Trail |
| . | . | . | Dipsacales | Caprifoliaceae | Sambucus | sp. | Elderberry*** | . | 6/13/2010 | Orange Trail (6/13/2010) |
| . | . | . | . | Adoxaceae | Diervilla | lonicera | Northern Bush-honeysuckle | 5/29/2010 | . | White Trail (right leg), just past overlook. Image: |
| . | . | . | . | Caprifoliaceae | Lonicera | japonica | Japanese Honeysuckle | 4/19/2009 | . | West of Mill River, invasive |
| . | . | . | . | . | Lonicera | sempervirens | Trumpet Honeysuckle | 4/25/2010 | . | Quarry |
| . | . | . | . | . | Viburnum | acerifolium | Maple-leaved Viburnum | 4/19/2009 | 6/13/2010 | Yellow Trail; Orange Trail (6/13/2010) |
| . | . | . | . | . | Viburnum | rafinesquianum | Downy Arrowwood | . | 6/13/2010 | Orange Trail |
| . | . | . | . | . | Viburnum | recognitum | Viburnum | 4/19/2009 | . | . |
| . | . | . | . | . | Sambucus | racemosa | Red Elderberry*** | 4/19/2009 | 6/13/2010 | Green Trail below Haswell's Ledge, Tower Path (4/19/2009); Tower Path near intersection with White Trail (6/13/2010); and White Trail near intersection with White Circle (6/5/2010). Image: |
| . | . | . | . | Asclepiadaceae | Asclepias | incarnata | Swamp Milkweed | 8/27/2007 | . | Violet Trail (not reported since 2007) |
| . | . | . | . | . | Asclepias | quadrifolia | Fourleaf Mllkweed | 5/1/2010 | . | Red Square Trail, near intersection with White Trail |
| . | . | . | . | . | Cynanchum (Vincetoxicum) | rossicum | European Swallowwort | 6/7/2009 | . | Quarry |
| . | . | . | . | . | Polygala | paucifolia | Fringed Polygala (Gaywings)** | 4/19/2009 | . | . |
| . | . | . | Lamiales | Lamiaceae | Collinsonia | canadensis | Horsebalm | . | 6/13/2010 | Along Mt. Carmel Avenue near Mill River; Tower Trail |
| . | . | . | . | . | Prunella | vulgaris | Selfheal | 7/25/2009 | . | . |
| . | . | . | . | . | Pycnanthemum | sp. | Mountainmint | 4/19/2009 | 6/13/2010 | Quarry? Orange Trail (6/13/2010) |
| . | . | . | . | . | Pycnanthemum | tenuifolium | Narrowleaf Mountainmint | 7/22/2010 | . | Quarry. Image: |
| . | . | . | . | . | Trichostema | dichotomum | Blue Curls | 8/26/2007 | . | Not reported since 2007 |
| . | . | . | . | Plantaginaceae | Plantago | lanceolata | English Plantain ** | 4/19/2009 | . | . |
| . | . | . | . | . | Plantago | major | Common Plantain | . | 6/13/2010 | Nature Trail |
| . | . | . | Rubiales | Rubiaceae | Cephalanthus | occidentalis | Buttonbush | 4/19/2009 | . | . |
| . | . | . | . | . | Galium | asprellum | Rough Bedstraw | . | 6/13/2010 | Nature Trail; Orange Trail |
| . | . | . | . | . | Houstonia | caerulea | Bluets** | 4/19/2009 | . | Near Ranger Station |
| . | . | . | . | . | Mitchella | repens | Partridgeberry** (Squawvine,Twinberry) | 4/19/2009 | 6/13/2010 | West side of Mill River, elsewhere (4/19/2009); Orange Trail (6/13/2010) |
| . | . | . | Scrophulariales | Oleaceae | Forsythia | sp. | Forsythia sp. | 4/19/2009 | . | . |
| . | . | . | . | . | Fraxinus | americana | White Ash | 4/19/2009 | . | . |
| . | . | . | . | Scrophulariaceae | Agalina | tenuifolia | False Foxglove | 8/23/2009 | . | . |
| . | . | . | . | . | Aureolaria | flava | Smooth Yellow False Foxglove | 7/9/2009 | . | Orange Trail |
| . | . | . | . | . | Linaria | vulgaris | Butter & Eggs | 8/10/2007 | . | Not reported since 2007 |
| . | . | . | . | . | Melampyrum | lineare | Cow-wheat | 6/12/2010 | . | Violet between Chestnut Lane and Red Circle. Image: |
| . | . | . | . | . | Mimulus | sp. (alatus?) | Monkeyflower (Winged?) | 7/22/2010 | . | Mill River. Image: |
| . | . | . | . | . | Nuttallanthus | canadensis | Blue Toadflax | 5/1/2010 | . | White Trail; Blue Trail halfway up Head |
| . | . | . | . | . | Penstemon | hirsutus | Hairy Beardtongue | 6/21/2009 | . | North end of the quarry |
| . | . | . | . | . | Verbascum | blattaria | Moth Mullein | . | 6/30/2010 | Red Diamond Trail |
| . | . | . | . | . | Verbascum | thapsus | Common Mullein | 8/10/2008 | 6/13/2010 | Orange Trail on 6/13/2010 |
| . | . | . | . | . | Veronica | officinalis | Common Speedwell (Common Gypsyweed) | 6/6/2009 | . | . |
| . | . | . | . | . | Veronica | persica | Birdseye Speedwell | . | June, 2010 | Quarry |