Rockville County Park

 

absinthe wormwood (Artemisia absinthium)

American basswood (Tilia americana var. americana)

American black currant (Ribes americanum)

American common reed (Phragmites australis ssp. americanus)

American cow parsnip (Heracleum maximum)

American elm (Ulmus americana)

American hazelnut (Corylus americana)

American red raspberry (Rubus idaeus ssp. strigosus)

American stinging nettle (Urtica gracilis ssp. gracilis)

American vetch (Vicia americana ssp. americana)

annual fleabane (Erigeron annuus)

Aunt Lucy (Ellisia nyctelea)

Bell’s honeysuckle (Lonicera × bella)

big bluestem (Andropogon gerardi)

black ash (Fraxinus nigra)

black cherry (Prunus serotina var. serotina)

black medick (Medicago lupulina)

black-seeded plantain (Plantago rugelii var. rugelii)

bland sweet cicely (Osmorhiza claytonii)

bloodroot (Sanguinaria canadensis)

blue cohosh (Caulophyllum thalictroides)

boxelder (Acer negundo var. negundo)

bracted spiderwort (Tradescantia bracteata)

bull thistle (Cirsium vulgare)

bur oak (Quercus macrocarpa var. macrocarpa)

Canada anemone (Anemonastrum canadense)

Canada mayflower (Maianthemum canadense)

Canada thistle (Cirsium arvense)

Canada wildrye (Elymus canadensis)

Canadian honewort (Cryptotaenia canadensis)

Canadian woodnettle (Laportea canadensis)

catnip (Nepeta cataria)

chokecherry (Prunus virginiana var. virginiana)

cleavers (Galium aparine)

common blue violet (Viola sororia)

common buckthorn (Rhamnus cathartica)

common burdock (Arctium minus)

common chickweed (Stellaria media)

common dandelion (Taraxacum officinale ssp. officinale)

common false Solomon’s seal (Maianthemum racemosum var. racemosum)

common hop (Humulus lupulus)

common milkweed (Asclepias syriaca)

common mullein (Verbascum thapsus ssp. thapsus)

common ragweed (Ambrosia artemisiifolia)

common sheep sorrel (Rumex acetosella)

common yarrow (Achillea millefolium)

curly dock (Rumex crispus)

cursed crowfoot (Ranunculus sceleratus)

cut-leaved coneflower (Rudbeckia laciniata var. laciniata)

downy Parlin’s pussytoes (Antennaria parlinii ssp. fallax)

downy yellow violet (Viola pubescens var. pubescens)

early figwort (Scrophularia lanceolata)

eastern marsh fern (Thelypteris palustris var. pubescens)

early meadow-rue (Thalictrum dioicum)

eastern prickly gooseberry (Ribes cynosbati)

eastern redcedar (Juniperus virginiana var. virginiana)

eastern star sedge (Carex radiata)

field chickweed (Cerastium arvense)

field horsetail (Equisetum arvense)

field pennycress (Thlaspi arvense)

field thistle (Cirsium discolor)

fragrant bedstraw (Galium triflorum)

giant chickweed (Myosoton aquaticum)

giant goldenrod (Solidago gigantea)

giant ragweed (Ambrosia trifida)

golden alexanders (Zizia aurea)

golden ragwort (Packera aurea)

gray-headed coneflower (Ratibida pinnata)

great St. Johnswort (Hypericum ascyron ssp. pyramidatum)

green ash (Fraxinus pennsylvanica)

ground ivy (Glechoma hederacea)

hawthorn (Crataegus sp.)

hemlock water-parsnip (Sium suave)

hoary alyssum (Berteroa incana)

hog peanut (Amphicarpaea bracteata var. bracteata)

Indiangrass (Sorghastrum nutans)

jack-in-the-pulpit (Arisaema triphyllum)

June grass (Koeleria macrantha)

Kentucky bluegrass (Poa pratensis ssp. pratensis)

kidney-leaved buttercup (Ranunculus abortivus)

large-flowered trillium (Trillium grandiflorum)

late goldenrod (Solidago altissima)

leadplant (Amorpha canescens)

leafy spurge (Euphorbia virgata)

little bluestem (Schizachyrium scoparium var. scoparium)

long-beaked sedge (Carex sprengelii)

mapleleaf goosefoot (Chenopodium simplex)

Maryland black snakeroot (Sanicula marilandica)

Missouri gooseberry (Ribes missouriense)

mouse-ear chickweed (Cerastium fontanum ssp. vulgare)

nannyberry (Viburnum lentago)

narrow-leaved purple coneflower (Echinacea angustifolia)

nodding fescue (Festuca subverticillata)

northern bedstraw (Galium boreale)

northern hackberry (Celtis occidentalis)

northern lady fern (Athyrium filix-femina var. angustum)

northern prickly ash (Zanthoxylum americanum)

northern red oak (Quercus rubra)

orange daylily (Hemerocallis fulva)

ostrich fern (Matteuccia struthiopteris var. pensylvanica)

pagoda dogwood (Cornus alternifolia)

paper birch (Betula papyrifera var. papyrifera)

Philadelphia fleabane (Erigeron philadelphicus var. philadelphicus)

plains cottonwood (Populus deltoides ssp. molinifera)

plumeless thistle (Carduus acanthoides ssp. acanthoides)

prairie cordgrass (Sporobolus michauxianus)

prairie coreopsis (Coreopsis palmata)

prairie groundsel (Packera plattensis)

prairie rose (Rosa arkansana)

prairie smoke (Geum triflorum var. triflorum)

purple meadow-rue (Thalictrum dasycarpum)

quaking aspen (Populus tremuloides)

rattlesnake fern (Botrypus virginianus)

red clover (Trifolium pratense)

red elderberry (Sambucus racemosa var. racemosa)

red osier dogwood (Cornus sericea ssp. sericea)

reed canary grass (Phalaris arundinacea)

rosy sedge (Carex rosea)

rough cinquefoil (Potentilla norvegica)

round-headed bush clover (Lespedeza capitata)

round-leaved dogwood (Cornus rugosa)

sandbar willow (Salix interior)

sensitive fern (Onoclea sensibilis)

shepherd’s purse (Capsella bursa-pastoris)

Siberian elm (Ulmus pumila)

silvery cinquefoil (Potentilla argentea)

sleepy catchfly (Silene antirrhina)

slender willow (Salix petiolaris)

smooth brome (Bromus inermis)

smooth rose (Rosa blanda var. blanda)

smooth Solomon’s seal (Polygonatum biflorum var. commutatum)

smooth sumac (Rhus glabra)

stiff goldenrod (Solidago rigida ssp. rigida)

sulphur cinquefoil (Potentilla recta)

sundial lupine (Lupinus perennis var. perennis)

switch grass (Panicum virgatum var. virgatum)

tall cinquefoil (Drymocallis arguta)

tamarack (Larix laricina)

Tatarian honeysuckle (Lonicera tatarica)

timothy (Phleum pratense ssp. pratense)

touch-me-not (Impatiens sp.)

tufted loosestrife (Lysimachia thyrsiflora)

upright carrionflower (Smilax ecirrhata)

veiny pea (Lathyrus venosus var. intonsus)

Virginia stickseed (Hackelia virginiana)

Virginia waterleaf (Hydrophyllum virginianum var. virginianum)

Virginia wildrye (Elymus virginicus)

western poison ivy (Toxicodendron rydbergii)

white avens (Geum canadense)

white campion (Silene latifolia ssp. alba)

white clover (Trifolium repens ssp. repens)

white rattlesnake root (Nabalus albus)

white snakeroot (Ageratina altissima var. altissima)

wild bergamot (Monarda fistulosa)

wild columbine (Aquilegia canadensis)

wild geranium (Geranium maculatum)

wild grape (Vitis riparia)

winter cress (Barbarea vulgaris)

wolfberry (Symphoricarpos occidentalis)

woodbine (Parthenocissus vitacea)

yellow marsh marigold (Caltha palustris var. palustris)

yellow wood sorrel (Oxalis stricta)

 

Acer negundo var. negundo (boxelder)

Achillea millefolium (common yarrow)

Ageratina altissima var. altissima (white snakeroot)

Ambrosia artemisiifolia (common ragweed)

Ambrosia trifida (giant ragweed)

Amorpha canescens (leadplant)

Amphicarpaea bracteata var. bracteata (hog peanut)

Andropogon gerardi (big bluestem)

Anemonastrum canadense (Canada anemone)

Antennaria parlinii ssp. fallax (downy Parlin’s pussytoes)

Aquilegia canadensis (wild columbine)

Arctium minus (common burdock)

Arisaema triphyllum (Jack-in-the-pulpit)

Artemisia absinthium (absinthe wormwood)

Asclepias syriaca (common milkweed)

Athyrium filix-femina var. angustum (northern lady fern)

Barbarea vulgaris (winter cress)

Berteroa incana (hoary alyssum)

Betula papyrifera var. papyrifera (paper birch)

Botrypus virginianus (rattlesnake fern)

Bromus inermis (smooth brome)

Caltha palustris var. palustris (yellow marsh marigold)

Capsella bursa-pastoris (shepherd’s purse)

Carduus acanthoides (plumeless thistle)

Carex radiata (eastern star sedge)

Carex rosea (rosy sedge)

Carex sprengelii (long-beaked sedge)

Caulophyllum thalictroides (blue cohosh)

Celtis occidentalis (northern hackberry)

Cerastium arvense (field chickweed)

Cerastium fontanum ssp. vulgare (mouse-ear chickweed)

Chenopodium simplex (mapleleaf goosefoot)

Cirsium arvense (Canada thistle)

Cirsium discolor (field thistle)

Cirsium vulgare (bull thistle)

Coreopsis palmata (prairie coreopsis)

Cornus alternifolia (pagoda dogwood)

Cornus rugosa (round-leaved dogwood)

Cornus sericea ssp. sericea (red osier dogwood)

Corylus americana (American hazelnut)

Crataegus sp. (hawthorn)

Cryptotaenia canadensis (Canadian honewort)

Drymocallis arguta (tall cinquefoil)

Echinacea angustifolia (narrow-leaved purple coneflower)

Ellisia nyctelea (Aunt Lucy)

Elymus canadensis (Canada wildrye)

Elymus virginicus (Virginia wildrye)

Equisetum arvense (field horsetail)

Erigeron annuus (annual fleabane)

Erigeron philadelphicus var. philadelphicus (Philadelphia fleabane)

Euphorbia virgata (leafy spurge)

Festuca subverticillata (nodding fescue)

Fraxinus nigra (black ash)

Fraxinus pennsylvanica (green ash)

Galium aparine (cleavers)

Galium boreale (northern bedstraw)

Galium triflorum (fragrant bedstraw)

Geranium maculatum (wild geranium)

Geum canadense (white avens)

Geum triflorum var. triflorum (prairie smoke)

Glechoma hederacea (ground ivy)

Hackelia virginiana (Virginia stickseed)

Hemerocallis fulva (orange daylily)

Heracleum maximum (American cow parsnip)

Humulus lupulus (common hop)

Hydrophyllum virginianum var. virginianum (Virginia waterleaf)

Hypericum ascyron ssp. pyramidatum (great St. Johnswort)

Impatiens sp. (touch-me-not)

Juniperus virginiana var. virginiana (eastern redcedar)

Koeleria macrantha (June grass)

Laportea canadensis (Canadian woodnettle)

Larix laricina (tamarack)

Lathyrus venosus var. intonsus) (veiny pea)

Lespedeza capitata (round-headed bush clover)

Lonicera × bella (Bell’s honeysuckle)

Lonicera tatarica (Tatarian honeysuckle)

Lupinus perennis var. perennis (sundial lupine)

Lysimachia thyrsiflora (tufted loosestrife)

Maianthemum canadense (Canada mayflower)

Maianthemum racemosum var. racemosum (common false Solomon’s seal)

Matteuccia struthiopteris var. pensylvanica (ostrich fern)

Medicago lupulina (black medick)

Monarda fistulosa (wild bergamot)

Myosoton aquaticum (giant chickweed)

Nabalus albus (white rattlesnake root)

Nepeta cataria (catnip)

Onoclea sensibilis (sensitive fern)

Osmorhiza claytonii (bland sweet cicely)

Oxalis stricta (yellow wood sorrel)

Packera aurea (golden ragwort)

Packera plattensis (prairie groundsel)

Panicum virgatum var. virgatum (switch grass)

Parthenocissus vitacea (woodbine)

Phalaris arundinacea (reed canary grass)

Phleum pratense ssp. pratense (timothy)

Phragmites australis ssp. americanus (American common reed)

Plantago rugelii var. rugelii (black-seeded plantain)

Poa pratensis ssp. pratensis (Kentucky bluegrass)

Polygonatum biflorum var. commutatum (smooth Solomon’s seal)

Populus deltoides ssp. molinifera (plains cottonwood)

Populus tremuloides (quaking aspen)

Potentilla argentea (silvery cinquefoil)

Potentilla norvegica (rough cinquefoil)

Potentilla recta (sulphur cinquefoil)

Prunus serotina var. serotina (black cherry)

Prunus virginiana var. virginiana (chokecherry)

Quercus macrocarpa var. macrocarpa (bur oak)

Quercus rubra (northern red oak)

Ranunculus abortivus (kidney-leaved buttercup)

Ranunculus sceleratus (cursed crowfoot)

Ratibida pinnata (gray-headed coneflower)

Rhamnus cathartica (common buckthorn)

Rhus glabra (smooth sumac)

Ribes americanum (American black currant)

Ribes cynosbati (eastern prickly gooseberry)

Ribes missouriense (Missouri gooseberry)

Rosa arkansana (prairie rose)

Rosa blanda var. blanda (smooth rose)

Rubus idaeus ssp. strigosus (American red raspberry)

Rudbeckia laciniata var. laciniata (cut-leaved coneflower)

Rumex acetosella (common sheep sorrel)

Rumex crispus (curly dock)

Salix interior (sandbar willow)

Salix petiolaris (slender willow)

Sambucus racemosa var. racemosa (red elderberry)

Sanguinaria canadensis (bloodroot)

Sanicula marilandica (Maryland black snakeroot)

Schizachyrium scoparium var. scoparium (little bluestem)

Scrophularia lanceolata (early figwort)

Silene antirrhina (sleepy catchfly)

Silene latifolia ssp. alba (white campion)

Sium suave (hemlock water-parsnip)

Smilax ecirrhata (upright carrionflower)

Solidago altissima (late goldenrod)

Solidago gigantea (giant goldenrod)

Solidago rigida ssp. rigida (stiff goldenrod)

Sorghastrum nutans (Indiangrass)

Sporobolus michauxianus (prairie cordgrass)

Stellaria media ssp. media (common chickweed)

Symphoricarpos occidentalis (wolfberry)

Taraxacum officinale ssp. officinale (common dandelion)

Thalictrum dasycarpum (purple meadow-rue)

Thalictrum dioicum (early meadow-rue)

Thelypteris palustris var. pubescens (eastern marsh fern)

Thlaspi arvense (field pennycress)

Tilia americana var. americana (American basswood)

Toxicodendron rydbergii (western poison ivy)

Tradescantia bracteata (bracted spiderwort)

Trifolium pratense (red clover)

Trifolium repens ssp. repens (white clover)

Trillium grandiflorum (large-flowered trillium)

Ulmus americana (American elm)

Ulmus pumila (Siberian elm)

Urtica gracilis ssp. gracilis (American stinging nettle)

Verbascum thapsus ssp. thapsus (common mullein)

Viburnum lentago (nannyberry)

Vicia americana ssp. americana (American vetch)

Viola pubescens var. pubescens (downy yellow violet)

Viola sororia (common blue violet)

Vitis riparia (wild grape)

Zanthoxylum americanum (northern prickly ash)

Zizia aurea (golden alexanders)