The following is a species list that I have compiled from my work and that of other peers working in the Berkshires. Readers are encouraged to comment or contribute.
| Species Name | Common Name |
| Acer pensylvanicum | Striped maple |
| Acer rubrum | Red maple |
| Acer saccharum | Sugar maple |
| Acer spicatum | |
| Actaea pachypoda | |
| Actaea rubra | |
| Adiantum pedatum | |
| Adlumia fungosa | |
| Ageratina altissima | |
| Agrimonia ?gryposepala | |
| Agrostis perennans | Hairgrass |
| Alliaria petiolata * | Garlic mustard |
| Allium tricoccum | Wild leek |
| Alnus incana ssp. rugosa | Alder |
| Ambrosia artemisiifolia | Common ragweed |
| Amelanchier laevis | Smooth shadbush |
| Amelanchier species | |
| Amphicarpaea bracteata | Hog-peanut |
| Anaphalis margaritacea | Pearly everlasting |
| Andromeda glaucophylla | |
| Anemone acutiloba | |
| Anemone americana | |
| Anemone quinquefolia | Wood anemone |
| Anemone virginiana | Canada anemone |
| Angelica ?atropurpurea | |
| Antennaria ?neglecta | Pussy’s-toes |
| Antennaria plantaginifolia | |
| Anthoxanthum odoratum * | Sweet vernal grass |
| Apocynum ?cannabinum | Dogbane |
| Aquilegia canadensis | |
| Aralia hispida | |
| Aralia nudicaulis | Wild sarsaparilla |
| Aralia racemosa | |
| Arceuthobium pusillum | |
| Arctium minus * | |
| Arisaema triphyllum | Jack-in-the-pulpit |
| Aronia species | |
| Arrhenatherum elatius * | |
| Artemisia vulgaris * | Mugwort |
| Asarum canadense | |
| Asclepias incarnata | |
| Asclepias syriaca | Common milkweed |
| Asplenium platyneuron | |
| Asplenium trichomanes | |
| Athyrium filix-femina | Lady fern |
| Barbarea vulgaris * | Winter-cress |
| Berberis thunbergii * | Barberry |
| Betula alleghaniensis | Yellow birch |
| Betula lenta | Black birch |
| Betula papyrifera | Paper birch |
| Betula populifolia | Gray birch |
| Bidens species | |
| Boechera laevigata | |
| Boehmeria cylindrica | False-nettle |
| Botrychium virginianaum | |
| Brachyelytrum erectum | Bearded shorthusk |
| Bromus inermis * | Smooth brome |
| Bromus pubescens | |
| Calamagrostis canadensis | |
| Calamagrostis stricta ssp. inexpansa | |
| Calla palustris | |
| Caltha palustris | Marsh marigold |
| Campanula aparinoides | |
| Cardamine concatenata | |
| Cardamine diphylla | |
| Carex aestivalis † | Sedge |
| Carex albicans var. albicans | |
| Carex albursina | Sedge |
| Carex amphibola | |
| Carex appalachica | Sedge |
| Carex arctata | |
| Carex argyrantha | Sedge |
| Carex aurea | |
| Carex blanda | Sedge |
| Carex bromoides | Sedge |
| Carex brunnescens | Sedge |
| Carex canescens | |
| Carex castanea | |
| Carex cephalophora | Sedge |
| Carex communis | Sedge |
| Carex comosa | |
| Carex crinita | Sedge |
| Carex cristatella | |
| Carex debilis | Sedge |
| Carex deweyana | Sedge |
| Carex digitalis | Sedge |
| Carex flava | |
| Carex folliculata | Sedge |
| Carex gracillima | Sedge |
| Carex gracillescens | |
| Carex granularis | Sedge |
| Carex hirtifolia | |
| Carex hitchcockiana | |
| Carex hystericina | |
| Carex interior | |
| Carex intumescens | Sedge |
| Carex lacustris | |
| Carex laevivaginata | |
| Carex lasiocarpa | |
| Carex laxiflora | Sedge |
| Carex leptalea | |
| Carex leptonervia | |
| Carex lupulina | Sedge |
| Carex lurida | Sedge |
| Carex muricata | |
| Carex normalis | |
| Carex novae-angliae | |
| Carex ?ormostachya | |
| Carex pedunculata | |
| Carex pensylvanica | Sedge |
| Carex platyphylla | |
| Carex prasina | Sedge |
| Carex rosea | Sedge |
| Carex retroflexa | |
| Carex scabrata | Sedge |
| Carex scoparia | Sedge |
| Carex sparganioides | |
| Carex sprengelii | |
| Carex stipata | Sedge |
| Carex stricta | Sedge |
| Carex swanii | Sedge |
| Carex tetanica | |
| Carex trisperma | |
| Carex virescens | |
| Carex viridula | |
| Carex vulpinoidea | Sedge |
| Carpinus caroliniana | Hornbeam |
| Carya cordiformis | Bitternut |
| Carya ?ovalis | Sweet pignut |
| Carya ovata | Shagbark hickory |
| Castanea dentata | Chestnut |
| Ceanothus americanus | |
| Celastrus orbiculatus * | Oriental bittersweet |
| Centaurea maculosa * | Knapweed |
| Cerastium species * | |
| Cercidiphyllum japonicum * | Katsura |
| Chelidonium majus * | Greater celandine |
| Chelone glabra | Turtle-heads |
| Chamaedaphne calyculata | |
| Chimaphila maculata | Spotted wintergreen |
| Chimaphila umbellata | |
| Chrysosplenium americanum | Golden saxifrage |
| Cicuta species | |
| Cinna latifolia | Drooping wood reed |
| Circaea alpina | Dwarf enchanter’s nightshade |
| Circaea lutetiana | Enchanter’s nightshade |
| Cirsium ?muticum | |
| Clematis virginiana | Virgin’s-bower |
| Clethra alnifolia | Sweet pepper-bush |
| Clinopodium vulgare * | Wild basil |
| Clintonia borealis | Wood lily |
| Collinsonia canadensis | |
| Comptonia peregrina | Sweet-fern |
| Conioselinum chinense | |
| Coptis trifolia | Goldthread |
| Corallorhiza trifida | |
| Cornus alternifolia | |
| Cornus amomum | |
| Cornus canadensis | |
| Cornus rugosa | |
| Cornus stolonifera | |
| Corydalis sempervirens | |
| Corylus cornuta | Beaked hazel |
| Crataegus brainerdii | Hawthorn |
| Cryptotaenia canadensis | |
| Cypripedium acaule | |
| Cypripedium parviflorum | |
| Cystopteris bulbifera | |
| Cystopteris tenuis | |
| Dactylis glomerata * | Orchard grass |
| Danthonia compressa | Northern oat grass |
| Danthonia spicata | Poverty-grass |
| Dasiphora fruticosa | |
| Daucus carota * | Queen Anne’s-lace |
| Decodon verticillatus | |
| Dennstaedtia punctilobula | Hay-scented fern |
| Dentaria concatenata | |
| Deparia acrostichoides | Silvery spleenwort |
| Deschampsia flexuosa | |
| Desmodium species | Tick-clover |
| Dianthus armeria * | Deptford pink |
| Dicanthelium acuminatum var. implicatum | |
| Dichanthelium latifolium | Panic grass |
| Dichanthelium linearifolium | Panic grass |
| Dichanthelium oligosanthes | Panic grass |
| Dicanthelium ?spretum | |
| Dicanthelium villosissimum | |
| Dicentra cucullaria | |
| Diervilla lonicera | Bush honeysuckle |
| Digitalis ?lanata | |
| Drosera rotundifolia | |
| Dryopteris carthusiana | Spinulose wood fern |
| Dryopteris cristata | Crested wood fern |
| Dryopteris intermedia | Common wood fern |
| Dryopteris marginalis | Marginal wood fern |
| Dulichium arundinaceum | |
| Eleocharis obtusa | Spike rush |
| Eleocharis species | |
| Elymus hystrix | |
| Elymus species | |
| Elymus trachycaulus | |
| Epifagus virginiana | Beech drops |
| Epigaea repens | Trailing arbutus |
| Epilobium coloratum | Purple-leaf willow-herb |
| Epipactis helleborine * | Helleborine |
| Equisetum arvense | Common horsetail |
| Equisetum scirpoides | |
| Equisetum sylvaticum | Woodland horsetail |
| Equisetum variegatum | |
| Erigeron annuus | Daisy-fleabane |
| Erigeron philadelphicus | |
| Erigeron pulchellus | Robin’s-plantain |
| Eriophorum viridi-carinatum | |
| Eriophorum species | |
| Erythronium americanum | Trout lily |
| Eupatorium perfoliatum | Boneset |
| Eupatorium rugosum | |
| Eupatorium ?sessilifolium | |
| Eurybia divaricata | White wood aster |
| Eurybia macrophylla | |
| Euthamia graminifolia | Flat-top goldenrod |
| Eutrochium ?purpureum | |
| Fagus grandifolia | American beech |
| Festuca subverticillata | Nodding fescue |
| Fragaria virginiana | Wild strawberry |
| Fraxinus americana | White ash |
| Fraxinus nigra | Black ash |
| Galium aparine * | |
| Galium mollugo * | White bedstraw |
| Galium ?lanceolatum | |
| Galium tinctorium | Bedstraw |
| Galium ?trifidum | |
| Galium triflorum | |
| Gaultheria procumbens | Wintergreen |
| Gaultheria hispidula | |
| Gaylussacia baccata | Black huckleberry |
| Geranium maculatum | Wild geranium |
| Geranium robertianum | |
| Geum canadense | White avens |
| Geum rivale | |
| Glyceria canadensis | Rattlesnake grass |
| Glyceria ?grandis | |
| Glyceria melicaria | Slender manna grass |
| Glyceria striata | Fowl manna grass |
| Gnaphalium obtusifolium | |
| Gymnocarpium dryopteris | |
| Hackelia virginiana | |
| Hamamelis virginiana | Witch-hazel |
| Hesperis matronalis * | Dame’s-rocket |
| Hieracium paniculatum | Hawkweed |
| Heuchera americana | |
| Holcus lanatus * | |
| Houstonia caerulea | Bluets |
| Huperzia lucidula | |
| Hydrocotyle americana | Pennywort |
| Hypericum boreale | |
| Ilex verticillata | Winterberry |
| Impatiens capensis | Spotted jewelweed |
| Impatiens pallida | |
| ?Inula helenium | |
| Iris versicolor | Blue flag |
| Juncus effusus | Soft rush |
| Juncus ?greenei | |
| Juncus pelocarpus | |
| Juncus tenuis | Slender yard-rush |
| Kalmia angustifolia | |
| Kalmia latifolia | Mountain laurel |
| Laportea canadensis | |
| Larix laricina | |
| Ledum groenlandicum | |
| Leersia oryzoides | Rice cutgrass |
| Leucanthemum vulgare * | Ox-eye daisy |
| Ligustrum species | |
| Lilium ?superbum | Turk’s-cap lily |
| Linaria vulgaris * | Common toadflax |
| Lindera benzoin | Spicebush |
| Liriodendron tulipifera | Tulip tree |
| Lobelia cardinalis | Cardinal-flower |
| Lobelia inflata | Indian-tobacco |
| Lobelia spicata | |
| Lonicera canadensis | Fly honeysuckle |
| Lonicera dioica | |
| Lonicera morrowii * | |
| Lotus corniculatus * | Bird’s-foot trefoil |
| Ludwigia palustris | |
| Luzula acuminata | Hairy woodrush |
| Luzula campestris | Common wood-rush |
| Lychnis flos-cuculi * | Ragged-robin |
| Lycopodium annotinum | |
| Lycopodium clavatum | |
| Lycopodium obscurum | Tree clubmoss |
| Lycopus uniflorus | Water-horehound |
| Lycopus virginicus | Water-horehound |
| Lyonia ligustrina | Maleberry |
| Lysimachia ciliata | Fringed loosestrife |
| Lysimachia terrestris | |
| Lythrum salicaria * | Purple loosestrife |
| Maianthemum canadense | False lily-of-the-valley |
| Malus ?pumila * | Common apple |
| Matteuccia struthiopteris | |
| Medeola virginiana | Indian cucumber root |
| Melampyrum lineare | |
| Melilotus alba * | White sweet-clover |
| Mentha arvensis | |
| Mitchella repens | Partridgeberry |
| Mitella diphylla | |
| Moehringia lateriflora | |
| Monarda fistulosa | Horsemint |
| Monotropa hypopithys | |
| Monotropa uniflora | Indian-pipe |
| Muhlenbergia species | Wire stem muhly |
| Nemopanthus mucronatus | Mountain holly |
| Nyssa sylvatica | Black gum |
| Oclemena acuminata | Mountain aster |
| Oenothera perennis | |
| Onoclea sensibilis | Sensitive fern |
| Oryzopsis asperifolia | |
| Oryzopsis racemosa | |
| Osmorhiza species | |
| Osmunda cinnamomea | Cinnamon fern |
| Osmunda claytoniana | Interrupted fern |
| Osmunda regalis | Royal fern |
| Ostrya virginiana | Hop hornbeam |
| Oxalis montana | |
| Oxalis ?stricta | Lady’s-sorrel |
| Packera aurea | Golden ragwort |
| Packera obovata | |
| Panax trifolius | Dwarf ginseng |
| Parnassia glauca | |
| Paronychia canadensis | |
| Parthenocissus quinquefolia | Virginia creeper |
| Peltandra virginica | |
| Penstemon species | |
| Phalaris arundinacea | Reed canary-grass |
| Phegopteris connectilis | |
| Phegopteris hexagonoptera | Broad beech fern |
| Phleum pratense * | Timothy |
| Phragmites australis * | Common reed |
| Phytolacca americana | Pokeweed |
| Picea rubens | Red spruce |
| Picea mariana | Black spruce |
| Pilea pumila | Clearweed |
| Pinus strobus | White pine |
| Plantago lanceolata * | English plantain |
| Plantago rugelii | Pale plantain |
| Platanus occidentalis | American sycamore |
| Platanthera clavellata | Little club-spur bog-orchid |
| Platanthera ?hyperborea | Orchid |
| Platanthera species | |
| Poa alsodes | Woodland bluegrass |
| Poa annua * | Annual bluegrass |
| Poa compressa * | |
| Poa pratensis * | Kentucky bluegrass |
| Poa saltuensis | |
| Poa trivialis * | Rough bluegrass |
| Podopyllum pedatum | |
| Pogonia ophioglossoides | |
| Polygala pauciflora | |
| Polygonatum biflorum | Small Solomon’s-seal |
| Polygonum arifolium | Arrow leaf tear thumb |
| Polygonum cespitosum * | Low smartweed |
| Polygonum cilinode | |
| Polygonum sagittatum | Tear thumb |
| Polypodium appalachianum | |
| Polypodium virginianum | Rock polyploidy |
| Polystichum acrostichoides | Christmas fern |
| Populus deltoides | |
| Populus grandidentata | Big tooth aspen |
| Populus tremuloides | |
| Potentilla canadensis | Dwarf cinquefoil |
| Potentilla simplex | Common cinquefoil |
| Prenanthes species | Rattlesnake-root |
| Primula ?japonica | |
| Prunella vulgaris * | Self-heal |
| Prunus serotina | Black cherry |
| Prunus virginiana | |
| Pteridium aquilinum | Bracken |
| Pyrola rotundifolia | Shinleaf |
| Quercus alba | White oak |
| Quercus ?coccinea | Scarlet oak |
| Quercus montana | Chestnut oak |
| Quercus rubra | Red oak |
| Quercus velutina | Black oak |
| Ranunculus abortivus | Kidney-leaf crowfoot |
| Ranunculus hispidus | |
| Ranunculus recurvatus | Hooked buttercup |
| Rhamnus cathartica * | |
| Rhododendron periclymenoides | Pinkster-flower |
| Rhododendron ?maximum | |
| Rhododendron viscosum | Swamp azalea |
| Rhynchospora alba | |
| Ribes americanum | |
| Ribes glandulosum | |
| Ribes cynosbati | Wild gooseberry |
| Rosa multiflora * | Multiflora rose |
| Rosa ?virginiana | |
| Rubus allegheniensis | Northern blackberry |
| Rubus ?flagellaris | Northern dewberry |
| Rubus hispidus | Swamp dewberry |
| Rubus occidentalis | Black raspberry |
| Rubus odoratus | |
| Rubus pubescens | Dwarf raspberry |
| Rudbeckia species * | Black-eyed Susan |
| Rumex acetosella * | Sheep sorrel |
| Sagittaria ?latifolia | |
| Salix bebbii | |
| Salix discolor | Pussy willow |
| Salix humilus | Gray willow |
| Salix nigra | Black willow |
| Salix sericea | |
| Salix serissima | |
| Sambucus canadensis | Black elderberry |
| Sambucus racemosa ssp. pubens | Red elderberry |
| Sanguinaria canadensis | |
| Sanicula species | |
| Sarracenia purpurea | |
| Sassafras albidum | Sassafras |
| Saxifraga pensylvanica | Swamp saxifrage |
| Saxifraga virginiensis | |
| Schizachne purpurascens | |
| Schizachyrium scoparium | |
| Schoenoplectus tabernaemontani | |
| Scirpus atrocinctus | Bulrush |
| Scirpus cyperinus | |
| Scirpus ?expansus | Wood bulrush |
| Scirpus hattorianus | |
| Scirpus ?microcarpus | |
| Scirpus pendulus | |
| Scrophularia lanceolata | Hare-figwort |
| Scutellaria galericulata | |
| Scutellaria lateriflora | Common skullcap |
| Sedum species * | Stonecrop |
| Selaginella apoda | |
| Setaria pumila * | Yellow foxtail |
| Sisyrinchium montanum | Blue-eyed grass |
| Smilax herbacea | Carrion-flower |
| Solanum dulcamara * | |
| Solidago caesia | Blue-stem goldenrod |
| Solidago canadensis | Canada goldenrod |
| Solidago flexicaulis | |
| Solidago juncea | |
| Solidago nemoralis | Gray goldenrod |
| Solidago patula | Spreading goldenrod |
| Solidago rugosa | Tall hairy goldenrod |
| Solidago ?uliginosa | |
| Sonchus species * | |
| Sorbaria sorbifolia * | |
| Sorbus americana | |
| Sparganium species | Bur-reed |
| Sphenopholis intermedia | |
| Spiraea alba var. latifolia | Meadow-sweet |
| Spiraea tomentosa | |
| Stellaria graminea * | Common stitchwort |
| Stellaria species | |
| Streptopus roseus | |
| Symphyotrichum lanceolatum | Tall white aster |
| Symphyotrichum lateriflorum | Calico aster |
| Symphyotrichum novae-angliae | |
| Symphyotrichum novi-belgii | New York aster |
| Symphyotrichum ?prenanthoides | |
| Symphyotrichum puniceus | Purple-stemmed aster |
| Taraxacum officinale * | Common dandelion |
| Thalictrum dioicum | |
| Thalictrum ?pubescens | Tall meadow-rue |
| Thalictrum thalictroides | |
| Thelypteris noveboracensis | New York fern |
| Thelypteris palustris | Marsh fern |
| Thelypteris simulata | |
| Tiarella cordifolia | Foamflower |
| Tilia americana | |
| Torreyochloa pallida var. pallida | Pale manna grass |
| Toxicodendron radicans | Poison ivy |
| Toxicodendron vernix | |
| Trientalis borealis | Starflower |
| Triadenum species | |
| Trifolium repens * | White clover |
| Trillium erectum | Purple trillium |
| Trillium undulatum | Painted trillium |
| Tsuga canadensis | Hemlock |
| Tussilago farfara * | Coltsfoot |
| Typha latifolia | Common cat-tail |
| Ulmus americana | American elm |
| Urtica dioica * | Stinging nettle |
| Utricularia species | |
| Uvularia perfoliata | |
| Uvularia sessilifolia | Bellwort |
| Vaccinium angustifolium | Low bush blueberry |
| Vaccinium corymbosum | High bush blueberry |
| Vaccinium ?oxycoccos | |
| Vaccinium stamineum | |
| Valeriana officinalis * | |
| Veratrum viride | False hellebore |
| Verbena ?hastata | Blue vervain |
| Veronica americana | |
| Veronica chamaedrys * | Bird’s-eye speedwell |
| Veronica peregrina | Purslane-speedwell |
| Veronica officinalis * | Speedwell |
| Veronica serpyllifolia * | Thyme-leaf speedwell |
| Veronica scutellata | |
| Viburnum acerifolium | Maple-leaf viburnum |
| Viburnum dentatum | Southern arrow-wood |
| Viburnum lantanoides | |
| Viburnum lentago | |
| Viburnum nudum var. cassinoides | Wild raisin |
| Viburnum opulus var. opulus | |
| Viola blanda | |
| Viola conspersa | American dog-violet |
| Viola cucullata | Blue marsh violet |
| Viola macloskeyi | Pale violet |
| Viola pubescens | |
| Viola rotundifolia | |
| Viola sagittata | Northern downy violet |
| Viola sororia | Common violet |
| Vitis riparia | |
| Vitis species | Grape |
| Woodsia ilvensis | |
| Woodsia obtusa | |
| Xyris montana | |
| Zanthoxylum americanum | |
| Zizia aurea | |
| Latest update: August 15, 2017. |
| (†) Denotes a species listed as “Endangered”, “Threatened”, or “Special Concern” by the State of Connecticut. |
| (*) Denotes species regarded as alien to the region. |
