| DIVISION | CLASS | SUBCLASS | ORDER | FAMILY | GENUS | SPECIES | COMMON NAME | SEEN? | WHERE? COMMENTS? |
| Bryophyta | Bryopsida | Bryidae | . | [Division Bryophyta] | . | . | Moss #1 | 4/19/2009 | west of Mill River |
| . | . | . | . | . | . | . | Moss #2 | 4/19/2009 | Many places |
| Equisetophyta | Equisetopsida | . | Equisetales | Equisetaceae | Equisetum | arvense | Common Horsetail | 4/19/2009 | Inland from the dam |
| . | . | . | . | Lycopodiaceae | Huperzia | lucidula | Club moss | 4/19/2009 | . |
| . | . | . | . | Lycopodiaceae | Lycopodium | obscurum | Tree Club-moss | 4/19/2009 | . |
| Pteridophyta | Filicopsida | . | Polypodiales | Polypodiaceae | Polypodium | virginianum | Rocky Polypody | 4/19/2009 | . |
| . | . | . | . | Osmundaceae | Osmunda | claytoniana | Interrupted Fern | 5/3/2009 | . |
| . | . | . | . | Dryopteridaceae | Polystichum | acrostichoides | Christmas Fern | 4/19/2009 | Inland from the dam, other places |
| . | . | . | . | Dryopteridaceae | Dryopteris | . | Shield Fern | 4/19/2009 | . |
| . | . | . | . | Pinaceae | Pinus | strobus | White Pine | 4/19/2009 | throughout the park |
| . | . | . | . | Pinaceae | Tsuga | canadensis | Eastern Hemlock | 4/19/2009 | Yellow/Nature Trail, and by Whitney Avenue, mostly dying |
| . | . | . | . | Cupressaceae | Juniperus | virginiana | Red Cedar | 4/19/2009 | . |
| Magnoliophyta | Liliopsida (monocots) | Arecidae | Arales | Araceae | Arisaema | triphyllum | Jack-in-the-Pulpit | 5/3/2009 | Throughout the Giant, various places |
| . | . | . | . | Araceae | Symplocarpus | foetidus | Skunk Cabbage** | 4/19/2009 | Green Trail below Haswell's Ledge; by Mill River |
| . | Liliopsida | Commelinidae | Cyperales | Cyperaceae | Carex | plantaginea | Plantainleaf Sedge | 4/19/2009 | . |
| . | . | . | . | Cyperaceae | Carex | pensylvanica | Pennsylvania sedge | 4/19/2009 | . |
| . | . | . | . | Poaceae | Anthoxanthum | odoratum | Sweet Vernal Grass | 4/19/2009 | . |
| . | . | . | . | Poaceae | Danthonia | spicata | Poverty Danthonia, Poverty Oatgrass | 4/19/2009 | . |
| . | . | . | . | Poaceae | Schizachyium | scoparium | Little Bluestem | 4/19/2009 | . |
| . | Liliopsida | Liliidae | Liliales | Liliaceae | Erythronium | americanum | Trout Lily (Adder's Tongue, | 4/19/2009 | Yellow/Nature Trail, Violet trailhead, many other places |
| . | . | . | . | Liliaceae | Maianthemum | canadense | Common Lily-of-the-valley** | 4/19/2009 | Yellow-Green Crossover, many places |
| . | . | . | . | Liliaceae | Maianthemum | racemosum | False Solomon's Seal** | 4/19/2009 | Yellow Trail, by dam, many other places |
| . | . | . | . | Liliaceae | Polygonatum | biflorum | Solomon's Seal** | 4/19/2009 | Yellow Trail, many places |
| . | . | . | . | Liliaceae | Polygonatum | pubescens | Hairy Solomon's Seal** | 4/19/2009 | . |
| . | . | . | . | Liliaceae | Uvularia | sessilifolia | Wild Oats (Sessile Bellwort)** | 4/19/2009 | . |
| . | . | . | . | Liliaceae | Hemerocallis | fulva | Day Lily** | 4/19/2009 | Violet Trailhead |
| . | . | . | . | Liliaceae | Allium | tricoccum | Wild Leek** | 4/19/2009 | throughout the park |
| . | Liliopsida | Liliidae | Liliales | Liliaceae | Veratrum | viride | False Hellebore** | 4/19/2009 | Green Trail below Haswell's Ledge, bank of Mill River |
| . | . | Liliidae | Liliales | Smilacaceae | Trillium | erectum | Red Trillium** | 4/19/2009 | Green Trail below Haswell's Ledge |
| . | . | . | . | . | Trillium | grandifloum | Large- Flowered or White Trillium | 4/19/2009 | . |
| . | . | . | Liliales | Iridaceae | Smilax | rotundifolia | Common Greenbrier | 4/19/2009 | Yellow Trail, Nature Trail |
| . | . | . | . | Iridaceae | Iris | pseudacorus | Pale Yellow Iris, Yellow Flag | 4/19/2009 | Near Mill Rivesr |
| . | Magnoliopsida (dicots) | Hamamelidae | Juglandales | Juglandaceae | Carya | alba | Mockernut Hickory | 4/19/2009 | . |
| . | . | . | . | Juglandaceae | Carya | cordiformis | Bitternut Hickory | 4/19/2009 | . |
| . | . | . | . | Juglandaceae | Carya | glabra | Pignut Hickory | 4/19/2009 | . |
| . | . | . | . | Juglandaceae | Carya | ovata | Shagbark Hickory | 4/19/2009 | Yellow Trail/Nature Trail |
| . | Magnoliopsida | Hamamelidae | Fagales | Betulaceae | Betula | alleghaniensis | Yellow Birch | 4/19/2009 | Yellow Trail/Nature Trail; near Mill River; quarry |
| . | . | . | . | Betulaceae | Betula | lenta | Black Birch | 4/19/2009 | many places |
| . | . | . | . | Betulaceae | Betula | papyrifera | White Birch | 4/19/2009 | . |
| . | . | . | . | Betulaceae | Corylus | cornuta | Beaked Hazel, Western Hazel | 4/19/2009 | . |
| . | . | . | . | Betulaceae | Betula | populifolia | Gray Birch | 4/19/2009 | . |
| . | . | . | . | Betulaceae | Ostrya | virginiana | Eastern hophornbeam | 4/19/2009 | . |
| . | . | . | Fagales | Fagaceae | Castanea | dentata | American Chestnut | 4/19/2009 | . |
| . | . | . | . | Fagaceae | Fagus | grandifolia | American Beech | 4/19/2009 | Yellow Trail, many places |
| . | . | . | . | Fagaceae | Quercus | alba | White Oak | 4/19/2009 | Violet Trailhead |
| . | . | . | . | Fagaceae | Quercus | ilicifolia | Scrub Oak** | 4/19/2009 | Yellow Trail, west of Yellow-Green Crossover |
| . | . | . | . | Fagaceae | Quercus | prinus | Chestnut Oak | 4/19/2009 | . |
| . | . | . | . | Fagaceae | Quercus | rubra | Northern Red Oak | 4/19/2009 | Violet Trailhead |
| . | . | . | . | Fagaceae | Quercus | velutina | Black Oak | 4/19/2009 | . |
| . | Magnoliopsida | Hamamelidae | Urticales | Moraceae | Morus | alba | White Mulberry * | 4/19/2009 | . |
| . | . | . | . | Polygonaceae | Rumex | crispus | Yellow Dock | 4/19/2009 | West of Mill River |
| . | . | . | . | Caryophyllaceae | Stellaria | media | Common Chickweed */** | 4/19/2009 | . |
| . | Magnoliopsida | Hamamelidae | Hamamelidales | Hamamelidaceae | Hamamelis | virginiana | Common Witch-hazel** | 4/19/2009 | Yellow Trail, many places |
| . | . | . | . | Hamamelidaceae | Platanus | occidentalis | American Sycamore | 4/19/2009 | Seed pods only |
| . | Magnoliopsida | Caryophyllidae | Caryophyllales | Portulacaceae | Claytonia | virginica | Spring-Beauty** | 4/19/2009 | Gren Trail below Haswell's Ledge; Red Diamond just south of intersection with Blue Trail |
| . | Magnoliopsida | Magnoliidae | Ranunculales | Ranunculaceae | Anemone | quinquefolia | Wood Anemone** | 4/19/2009 | Tower Path |
| . | . | . | . | Ranunculaceae | Actaea | rubra | Red Baneberry | 5/3/2009 | Picnic area (I think) |
| . | . | . | . | Ranunculaceae | Caltha | palustris | Marsh Marigold** | 4/19/2009 | Off Green Trail, east of Red Triangle; near Mill River (east side?) |
| . | . | . | . | Ranunculaceae | Coptis | laciniata | Gold Thread | 4/19/2009 | . |
| . | . | . | . | Ranunculaceae | Hepatica | americana | Round-lobed Hepatica** | 4/19/2009 | White Trail, just off Tower Path |
| . | . | . | . | Ranunculaceae | Ranunculus | arbortivus | Kidneyleaf Crowfoot | 4/19/2009 | Green Trail, below Haswell's Ledge |
| . | . | . | . | Ranunculaceae | Aquilegia | canadensis | Columbine** | 4/19/2009 | Huge new patch seen on 5/3/2009 in the quarry! |
| . | . | . | . | Ranunculaceae | Anemonella | thalictroides | Rue-Anemone** | 4/19/2009 | Yellow-Green Crossover |
| . | . | . | . | Berberidaceae | Berberis | thunbergii | Japanese Barberry * | 4/19/2009 | All over the Park, invasive |
| . | . | . | . | Berberidaceae | Caulophyllum | thalictroides | Blue Cohosh** | 4/19/2009 | Green Trail below Haswell's Ledge; near Mt. Carmel Avenue |
| . | . | . | . | Berberidaceae | Podophyllum | peltatum | May Apple | 5/3/2009 | Red Diamond Trail, just south of the intersection with the Blue Trail |
| . | Magnoliopsida | Magnoliidae | Magnoliales | Magnoliaceae | Liriodendron | tulipifera | Tulip Tree | 4/19/2009 | Green Trail, near Red Triangle |
| . | Magnoliopsida | Magnoliidae | Laurales | Lauraceae | Lindera | benzoin | Spicebush*** | 4/19/2009 | Yellow Trail and Green Trail; Violet Trailhead and dam |
| . | . | . | . | Lauraceae | Sassafras | albidum | White Sassafras | 4/19/2009 | Off Red Triangle, north of Green Trail |
| . | Magnoliopsida | Magnoliidae | Papaverales (Capparales) | Papaveraceae | Chelidonium | majus | Greater Celandine */** | 4/19/2009 | . |
| . | . | . | . | Papaveraceae | Stylophorum | diphyllum | Celandine Poppy | 5/3/2009 | Edge of the picnic area, near the Ranger's Shed |
| . | . | . | . | Papaveraceae | Dicentra | cucullaria | Dutchman's-Britches** | 4/19/2009 | Throughout the Park |
| . | . | . | . | Papaveraceae | Sanguinaria | canadensis | Bloodroot** | 4/19/2009 | Yellow-Green Crossover, north of Yellow Trail, and Tower Path |
| . | . | . | . | Papaveraceae | Corydails | sempervirens | Pale Corydalis** | 4/19/2009 | On Nature Trail, near #30 |
| . | Magnoliopsida | Dilleniidae | Capparales | Brassicaceae (Cruciferae) | Alliaria | petiolata | Garlic Mustard */** | 4/19/2009 | Throughout the Park, invasive |
| . | . | . | . | Brassicaceae | Capsella | bursa-pastoris | Shepherd's Purse */** | 4/19/2009 | . |
| . | . | . | . | Brassicaceae | Arabis | laevigata | Smooth Rock Cress** | 4/19/2009 | Yellow Trail and Tower Path |
| . | . | . | . | Brassicaceae | Dentaria | laciniata | Cut-leaved Toothwort** | 4/19/2009 | Just off Tower Path, ~100' from parking area |
| . | . | . | . | Brassicaceae | Cardamine | pensylvanica | Pennsylvania Bittercress** | 4/19/2009 | On Nature Trail, near #30 |
| . | Magnoliopsida | Dilleniidae | Ericales | Ericaceae | Kalmia | latifolia | Mountain Laurel** | 4/19/2009 | Yellow Trail/Green Trail, many places |
| . | . | . | . | Ericaceae | Vaccinium | corymbosum | Highbush Blueberry | 4/19/2009 | . |
| . | . | . | . | Ericaceae | Vaccinium | pallidum | Lowbush Blueberry | 4/19/2009 | . |
| . | . | . | . | Ericaceae | Gaylussacia | baccata | Black Huckleberry*** | 4/19/2009 | . |
| . | Magnoliopsida | Dilleniidae | Ericales | Monotropaceae | Monotropa | uniflora | Indian-pipe** | 4/19/2009 | Yellow Trail, west of Red Triangle Trail |
| . | Magnoliopsida | Dilleniidae | Ericales | Pyrolaceae | Chimaphila | maculata | Striped Prince's Pine (Pipsissewa, Spotted Wintergreen) | 4/19/2009 | West of the Mill River |
| . | Magnoliopsida | Dilleniidae | Ericales | Pyrolaceae | Pyrola | americana | American Wintergreen** | 4/19/2009 | West of the Mill River |
| . | Magnoliopsida | Dilleniidae | Primulales | Primulaceae | Trientalis | borealis | Starflower | 4/19/2009 | Below Pavilion |
| . | . | . | . | Primulaceae | Lysimachia | quadrifolia | Whorled Loosestrife** | 4/19/2009 | Yellow Trail, west of Yellow-Green Crossover |
| . | . | . | . | Rosaceae | Rubus | sp. | Blackberry sp. | 4/19/2009 | . |
| . | . | . | . | Rosaceae | Rubus | odoratus | Purple-flowering Raspberry** | 4/19/2009 | Tower Path and Red Hexagon Trail |
| . | . | . | . | Rosaceae | Spiraea | alba | White Spiraea (White Meadowsweet) | 5/3/2009 | Quarry |
| . | . | . | . | Rosaceae | Agrimonia | . | Agrimony | 4/19/2009 | . |
| . | Magnoliopsida | Dilleniidae | Salicales | Salicaceae | Populus | tremuloides | Quaking Aspen | 5/3/2009 | Quarry |
| . | Magnolipsida | Dilleniidae | Violales | Violaceae | Viola | papilionacea | Common Blue Violet** | 4/19/2009 | Many, on the stair bottom byo the Mill River |
| . | . | . | . | Violaceae | Viola | fimbriatula | Northern Downy Violet** | 4/19/2009 | . |
| . | . | . | . | Violaceae | Viola | palmata | Early Blue Violet (Wood Violet)*** | 4/19/2009 | West of Mill River |
| . | . | . | . | Violaceae | Viola | rotundifolia | Round-leaved Yellow Violet (Stemless)*** | 4/19/2009 | Green Trail below Haswell's Ledge |
| . | . | . | . | Violaceae | Viola | septentrionalis | Northern Blue Violet*** | 4/19/2009 | Yellow Trail, many places |
| . | . | . | . | Violaceae | Viola | sororia | Wooly (Common) Blue Violet*** | 4/19/2009 | . |
| . | Magnoliopsida | Rosidae | Apiales | Araliaceae | Aralia | nudicaulis | Wild Sasparilla | 4/26/2009 | Cross-country ski trail parallel to Red Circle |
| . | . | . | . | Araliaceae | Panax | trifolius | Dwarf Ginseng** | 4/19/2009 | Green Trail below Haswell's Ledge; by first vernal pool off Blue Trail, near Red Circle |
| . | Magnoliopsida | Rosidae | Apiales | Celastraceae | Euonymus | europaeus | European euonymus | 4/19/2009 | . |
| . | . | . | . | Celastraceae | Euonymus | alatus | Burningbush*** | 4/19/2009 | Yellow Trail at Yellow/Green Connector, invasive |
| . | Magnoliopsida | Rosidae | Cornales | Cornaceae | Cornus | florida | Flowering Dogwood | 4/19/2009 | Yellow Trail and Nature Trail |
| . | Magnoliopsida | Rosidae | Geraniales | Balsaminaceae | Impatiens | capensis | Spotted Touch-me-not** | 4/19/2009 | . |
| . | Magnoliopsida | Rosidae | Geraniales | Clethraceae | Clethra | alnifolia | Sweet Pepperbush | 4/19/2009 | Green Trail, east of Yellow-Green Connector |
| . | Magnoliopsida | Rosidae | Geraniales | Geraniaceae | Geranium | maculatum | Wild Geranium** | 4/19/2009 | Tower Path |
| . | . | . | . | Geraniaceae | Geranium | robertianum | Herb-Robert** | 4/19/2009 | Green Trail, below Haswell's Ledge; Tower Path |
| . | Magnoliopsida | Rosidae | Geraniales | Oxalidaceae | Oxalis | stricta | Yellow Wood Sorrel*** | 4/19/2009 | . |
| . | Magnoliopsida | Rosidae | Rhamnales | Elaeagnaceae | Elaeagnus | umbellata | Autumn Olive * | 4/19/2009 | Quarry, other places in the Giant |
| . | Magnoliopsida | Rosidae | Rhamnales | Vitaceae | Parthenocissus | quinquefolia | Virginia Creeper | 4/19/2009 | . |
| . | . | . | . | Vitaceae | Vitis | sp. | Grape sp. | 4/19/2009 | . |
| . | . | . | . | Vitaceae | Vitis | labrusca | Fox Grape | 4/19/2009 | West of the Mill River |
| . | Magnoliopsida | Rosidae | Rosales | Saxifragaceae | Saxifraga | virginiensis | Early Saxifrage** | 4/19/2009 | Yellow-Green Crossover, Tower Path |
| . | . | . | . | Saxifragaceae | Chrysosplenium | aqmericanum | American Golden Saxifrage | 4/19/2009 | . |
| . | Magnoliopsida | Rosidae | Sapindales | Aceraceae | Acer | platanoides | Norway Maple * | 4/19/2009 | . |
| . | . | . | . | Aceraceae | Acer | rubrum | Red Maple*** | 4/19/2009 | All over stone walls |
| . | . | . | . | Aceraceae | Acer | saccharum | Sugar Maple | 4/19/2009 | . |
| . | Magnoliopsida | Rosidae | Sapindales | Anacardiaceae | Rhus | hirta | Staghorn Sumac | 4/19/2009 | . |
| . | . | . | . | Anacardiaceae | Toxicodendron | radicans | Poison Ivy | 4/19/2009 | Yellow Trail east of parking area |
| . | Magnoliopsida | Asteridae | Asterales | Asteraceae | Aster | divaricatus | White Wood Aster | 4/19/2009 | Team 1 wrote "c.f.", Sweeney identified only the genus |
| . | . | . | . | Asteraceae | Aster | linariifolius | Stiff Aster | 5/3/2009 | Quarry |
| . | . | . | . | Asteraceae | Aster | vimineus | Small White Aster** | 4/19/2009 | . |
| . | . | . | . | Asteraceae | Solidago | sp. | . | 4/19/2009 | . |
| . | . | . | . | Asteraceae | Taraxacum | officinale | Common Dandelion * | 4/19/2009 | . |
| . | . | . | . | Asteraceae | Artemisia | vulgaris | Mugwort | 4/19/2009 | . |
| . | . | . | . | Asteraceae | Antennaria | neglecta | Field Pussytoes** | 4/19/2009 | . |
| . | . | . | . | Asteraceae | Antennaria | plantaginifolia | Plantain-leaved Pussytoes** | 4/19/2009 | . |
| . | . | . | . | Asteraceae | Taraxacum | officinate | Common Dandelion ** | 4/19/2009 | . |
| . | . | . | . | Asteraceae | Hieracium | venosum | Rattlesnake-weed** | 4/19/2009 | . |
| . | . | . | . | Asteraceae | Arctium | minus | Common Burdock** | 4/19/2009 | . |
| . | Magnoliopsida | Asteridae | Dipsacales | Caprifoliaceae | Lonicera | japonica | Japanese Honeysuckle | 4/19/2009 | West of Mill River, invasive |
| . | . | Asteridae | Dipsacles | Caprifoliaceae | Lonicera | sempervirens | Trumpet Honeysuckle | 4/25/2010 | In upper Quarry |
| . | . | . | . | Caprifoliaceae | Viburnum | acerifolium | Maple-leaved Viburnum | 4/19/2009 | . |
| . | . | . | . | Caprifoliaceae | Viburnum | recognitum | Viburnum | 4/19/2009 | . |
| . | . | . | . | Caprifoliaceae | Sambucus | racemosa | Red Elderberry*** | 4/19/2009 | Green Trail below Haswell's Ledge, Tower Path |
| . | Magnoliopsida | Asteridae | Gentianales | Asclepiadaceae | Polygala | paucifolia | Fringed Polygala (Gaywings)** | 4/19/2009 | . |
| . | Magnoliopsida | Asteridae | Lamiales | Lamiaceae | Pycnanthemum | sp. | Mountainmint | 4/19/2009 | Quarry? |
| . | Magnoliopsida | Asteridae | Plantaginales | Plantaginaceae | Plantago | lanceolata | English Plantain */** | 4/19/2009 | . |
| . | Magnoliopsida | Asteridae | Rubiales | Rubiaceae | Houstonia | caerulea | Bluets** | 4/19/2009 | Near Ranger Station |
| . | . | . | . | Rubiaceae | Mitchella | repens | Partridgeberry** (Squawvine,Twinberry) | 4/19/2009 | West side of Mill River, elsewhere |
| . | . | . | . | Rubiaceae | Cephalanthus | occidentalis | Buttonbush | 4/19/2009 | . |
| . | Magnoliopsida | Asteridae | Scrophulariales | Oleaceae | Forsythia | sp. | Forsythia sp. * | 4/19/2009 | . |
| . | . | . | . | Oleaceae | Fraxinus | americana | White Ash | 4/19/2009 | . |