Of the sorrel family (Oxalidaceae), Oxalis filipes.

O. Filipes

Of the sorrel family (Oxalidaceae), Oxalis filipes.

Of the sorrel family (Oxalidaceae), Oxalis grandis.

O. Grandis

Of the sorrel family (Oxalidaceae), Oxalis grandis.

Of the sorrel family (Oxalidaceae), Oxalis repens.

O. Repens

Of the sorrel family (Oxalidaceae), Oxalis repens.

Of the sorrel family (Oxalidaceae), the wood sorrel or Oxalis Acetosella.

Wood Sorrel

Of the sorrel family (Oxalidaceae), the wood sorrel or Oxalis Acetosella.

Of the sorrel family (Oxalidaceae), the yellow wood or lady's sorrel (Oxalis stricta), hairy in all parts.

Yellow Wood Sorrel

Of the sorrel family (Oxalidaceae), the yellow wood or lady's sorrel (Oxalis stricta), hairy in all…

Of the sorrel family (Oxalidaceae), the yellow wood or lady's sorrel (Oxalis corniculata), generally smooth.

Yellow Wood Sorrel

Of the sorrel family (Oxalidaceae), the yellow wood or lady's sorrel (Oxalis corniculata), generally…

Of the flax family (Linaceae), Linum carolinianum.

L. Carolinianum

Of the flax family (Linaceae), Linum carolinianum.

Of the flax family (Linaceae), common flax or Linum usitatissimum.

Common Flax

Of the flax family (Linaceae), common flax or Linum usitatissimum.

Of the milkwort family (Polygalaceae), the Seneca snakeroot or Polygala Senega.

Seneca Snakeroot

Of the milkwort family (Polygalaceae), the Seneca snakeroot or Polygala Senega.

Of the milkwort family (Polygalaceae), the Milkwort or Polygala polygama.

Milkwort

Of the milkwort family (Polygalaceae), the Milkwort or Polygala polygama.

Of the milkwort family (Polygalaceae), Polygala sanguinea.

P. Sanguinea

Of the milkwort family (Polygalaceae), Polygala sanguinea.

Of the milkwort family (Polygalaceae), the cross-leaved milkwort or Polygala cruciata.

Cross-Leaved Milkwort

Of the milkwort family (Polygalaceae), the cross-leaved milkwort or Polygala cruciata.

Of the spurge family (Euphorbiaceae), the sun spurge or Euphorbia Helioscopia.

Sun Spurge

Of the spurge family (Euphorbiaceae), the sun spurge or Euphorbia Helioscopia.

Of the spurge family (Euphorbiaceae), Euphorbia Preslii.

E. Preslii

Of the spurge family (Euphorbiaceae), Euphorbia Preslii.

Of the spurge family (Euphorbiaceae), the spotted spurge or Euphorbia maculata.

Spotted Spurge

Of the spurge family (Euphorbiaceae), the spotted spurge or Euphorbia maculata.

Of the spurge family (Euphorbiaceae), the cypress spurge or Euphorbia Cyparissias.

Cypress Spurge

Of the spurge family (Euphorbiaceae), the cypress spurge or Euphorbia Cyparissias.

Of the spurge family (Euphorbiaceae), the white margined spurge or Snow on the Mountain (Euphorbia marginata).

White Margined Spurge

Of the spurge family (Euphorbiaceae), the white margined spurge or Snow on the Mountain (Euphorbia marginata).

Of the cashew family (Anacardiaceae), Staghorn Sumac or Rhus typhina.

Staghorn Sumac

Of the cashew family (Anacardiaceae), Staghorn Sumac or Rhus typhina.

Of the cashew family (Anacardiaceae), the dwarf sumac or Rhus copallina.

Dwarf Sumac

Of the cashew family (Anacardiaceae), the dwarf sumac or Rhus copallina.

Of the cashew family (Anacardiaceae), poison sumac or Rhus Vernix.

Poison Sumac

Of the cashew family (Anacardiaceae), poison sumac or Rhus Vernix.

Of the cashew family (Anacardiaceae), poison ivy or Rhus toxicodendron.

Poison Ivy

Of the cashew family (Anacardiaceae), poison ivy or Rhus toxicodendron.

Of the staff-tree family (Celastraceae), the climbing bittersweet waxwork or Celastrus scandens).

Climbing Bittersweet Waxwork

Of the staff-tree family (Celastraceae), the climbing bittersweet waxwork or Celastrus scandens).

Of the jewel-weed family (Balsaminaceae), the Jewelweed or pale touch-me-not (Impatiens pallida).

Jewel-Weed

Of the jewel-weed family (Balsaminaceae), the Jewelweed or pale touch-me-not (Impatiens pallida).

Of the staff-tree family (Celastraceae), the mountain lover of Pachystima Canbyi.

Mountain Lover

Of the staff-tree family (Celastraceae), the mountain lover of Pachystima Canbyi.

Of the buckthorn family (Rhamnaceae), the common buckhorn or Rhamnus cathartica.

Common Buckthorn

Of the buckthorn family (Rhamnaceae), the common buckhorn or Rhamnus cathartica.

Of the buckthorn family (Rhamnaceae), New Jersey tea or Ceanothus americanus.

New Jersey Tea

Of the buckthorn family (Rhamnaceae), New Jersey tea or Ceanothus americanus.

Of the vine family (Vitaceae), the Northern Fox Grape or Vitis Labrusca.

Northern Fox Grape

Of the vine family (Vitaceae), the Northern Fox Grape or Vitis Labrusca.

Of the mallow family (Malvaceae), the common mallow or Malva rotundifolia.

Common Mallow

Of the mallow family (Malvaceae), the common mallow or Malva rotundifolia.

Of the mallow family (Malvaceae), the musk mallow or Malva moschata.

Musk Mallow

Of the mallow family (Malvaceae), the musk mallow or Malva moschata.

Of the mallow family (Malvaceae), the leaf of the high mallow or Malva sylvestris.

High Mallow

Of the mallow family (Malvaceae), the leaf of the high mallow or Malva sylvestris.

Of the mallow family (Malvaceae), the leaf and flower of the marsh mallow or Althaea officinalis.

Marsh Mallow

Of the mallow family (Malvaceae), the leaf and flower of the marsh mallow or Althaea officinalis.

Of the mallow family (Malvaceae), the purple poppy-mallow or Callirrhoe involucrata.

Purple Poppy-Mallow

Of the mallow family (Malvaceae), the purple poppy-mallow or Callirrhoe involucrata.

Of the mallow family (Malvaceae), the leaf of the halberd-leaved rose-mallow or Hibiscus militaris.

Halberd-Leaved Rose-Mallow

Of the mallow family (Malvaceae), the leaf of the halberd-leaved rose-mallow or Hibiscus militaris.

Of the mallow family (Malvaceae), the leaf of the bladder ketmia or Hibiscus Trionum.

Bladder Ketmia

Of the mallow family (Malvaceae), the leaf of the bladder ketmia or Hibiscus Trionum.

Of the mallow family (Malvaceae), the flower of the swamp rose-mallow or Hibiscus Moscheutos.

Swamp Rose-Mallow

Of the mallow family (Malvaceae), the flower of the swamp rose-mallow or Hibiscus Moscheutos.

Of the St. John's Wort family (Hypericaceae), St. Andrew's Cross or Ascyrum hypericoides.

St. Andrew's Cross

Of the St. John's Wort family (Hypericaceae), St. Andrew's Cross or Ascyrum hypericoides.

Of the St. John's Wort family (Hypericaceae), Hypericum virgatum.

H. Virgatum

Of the St. John's Wort family (Hypericaceae), Hypericum virgatum.

Of the St. John's Wort family (Hypericaceae), the common St. John's wort: left, Hypericum ellipticum; right, Hypericum perforatum.

Common St. John's Wort

Of the St. John's Wort family (Hypericaceae), the common St. John's wort: left, Hypericum ellipticum;…

Of the St. John's Wort family (Hypericaceae), Hypericum Canadense.

H. Canadens

Of the St. John's Wort family (Hypericaceae), Hypericum Canadense.

Of the St. John's Wort family (Hypericaceae), the marsh St. John's wort, Hypericum Virginicum.

Marsh St. John's Wort

Of the St. John's Wort family (Hypericaceae), the marsh St. John's wort, Hypericum Virginicum.

Of the rock-rose family (Cistaceae), the plant and flower of Hudsonia tomentosa.

H. Tomentosa

Of the rock-rose family (Cistaceae), the plant and flower of Hudsonia tomentosa.

Of the rock-rose family (Cistaceae), the frostweed or Helianthemum Canadense.

Frostweed

Of the rock-rose family (Cistaceae), the frostweed or Helianthemum Canadense.

Of the rock-rose family (Cistaceae), the pinweed or Lechea minor.

Pinweed

Of the rock-rose family (Cistaceae), the pinweed or Lechea minor.

Of the violet family (Violaceae), the marsh violet or Viola palustris.

Marsh Violet

Of the violet family (Violaceae), the marsh violet or Viola palustris.

Of the violet family (Violaceae), the dog violet or Viola conspersa.

Dog Violet

Of the violet family (Violaceae), the dog violet or Viola conspersa.

Of the violet family (Violaceae), the Viola palmata

V. Palmata

Of the violet family (Violaceae), the Viola palmata

Of the violet family (Violaceae), the blue violet or Viola papilionacea.

Blue Violet

Of the violet family (Violaceae), the blue violet or Viola papilionacea.

Of the violet family (Violaceae), the arrow-leaved violet or Viola sagittata.

Arrow-Leaved Violet

Of the violet family (Violaceae), the arrow-leaved violet or Viola sagittata.

Of the violet family (Violaceae): left, sweet white violet (Viola blanda); right, lance-leaved violet (Viola lanceolata).

Sweet White Violet and Lance-Leaved Violet

Of the violet family (Violaceae): left, sweet white violet (Viola blanda); right, lance-leaved violet…

Of the violet family (Violaceae), the downy yellow violet or Viola pubescens.

Downy Yellow Violet

Of the violet family (Violaceae), the downy yellow violet or Viola pubescens.

Of the violet family (Violaceae), the round-leaved violet or Viola rotundifolia.

Round-Leaved Violet

Of the violet family (Violaceae), the round-leaved violet or Viola rotundifolia.

Of the violet family (Violaceae), the Canada violet or Violaa canadensis.

Canada Violet

Of the violet family (Violaceae), the Canada violet or Violaa canadensis.

Of the violet family (Violaceae), the pale violet or Viola striata.

Pale Violet

Of the violet family (Violaceae), the pale violet or Viola striata.

Of the loosestrife family (Lythraceae), the long purples or Lythrum Salicaria.

Long Purples

Of the loosestrife family (Lythraceae), the long purples or Lythrum Salicaria.

Of the loosestrife family (Lythraceae), the loosestrife or Lythrum alatum.

Loosestrife

Of the loosestrife family (Lythraceae), the loosestrife or Lythrum alatum.

Of the loosestrife family (Lythraceae), the clammy cuphea or Cuphea viscosissima.

Clammy Cuphea

Of the loosestrife family (Lythraceae), the clammy cuphea or Cuphea viscosissima.

Of the loosestrife family (Lythraceae), the swamp loosestrife or Decodon verticillatus.

Swamp Loosestrife

Of the loosestrife family (Lythraceae), the swamp loosestrife or Decodon verticillatus.

Of the meadow-beauty family (Melastomaceae), Rhexia Mariana.

R. Mariana

Of the meadow-beauty family (Melastomaceae), Rhexia Mariana.

Of the meadow-beauty family (Melastomaceae), Rhexia ciliosa.

R. Ciliosa

Of the meadow-beauty family (Melastomaceae), Rhexia ciliosa.

Of the meadow-beauty family (Melastomaceae), Rhexia aristosa

R. Aristosa

Of the meadow-beauty family (Melastomaceae), Rhexia aristosa