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Of the mustard family (Cruciferae): left, peppergrass (Lepidium Virginicum); right, shepherd's purse (Capsella Bursa-pastoris).

Pepper Grass and Shepherd's Purse

Of the mustard family (Cruciferae): left, peppergrass (Lepidium Virginicum); right, shepherd's purse…

Of the pitcher plant family (Sarraceniaceae), the trumpets or Sarracenia flava.

Trumpets

Of the pitcher plant family (Sarraceniaceae), the trumpets or Sarracenia flava.

Of the pitcher plant family (Sarraceniaceae), the pitcher plant or Sarracenia purpurea.

Pitcher Plant

Of the pitcher plant family (Sarraceniaceae), the pitcher plant or Sarracenia purpurea.

Of the sundew family (Droseraceae), the thread-leaved sundew or Drosera filiformis.

Thread-Leaved Sundew

Of the sundew family (Droseraceae), the thread-leaved sundew or Drosera filiformis.

Of the sundew family (Droseraceae), the long-leaved sundew or Drosera longifolia var. Americana.

Long-Leaved Sundew

Of the sundew family (Droseraceae), the long-leaved sundew or Drosera longifolia var. Americana.

Of the sundew family (Droseraceae), the round-leaved sundew or Drosera rotundifolia.

Round-Leaved Sundew

Of the sundew family (Droseraceae), the round-leaved sundew or Drosera rotundifolia.

Of the orpine family (Crassulaceae), the wild stonecrop or Sedum ternatum.

Wild Stonecrop

Of the orpine family (Crassulaceae), the wild stonecrop or Sedum ternatum.

Of the orpine family (Crassulaceae), the live-forever or garden orpine (Sedum purpureum).

Live-Forever or Garden Orpine

Of the orpine family (Crassulaceae), the live-forever or garden orpine (Sedum purpureum).

Of the orpine family (Crassulaceae), the ditch stonecrop or Penthorum sedoides.

Ditch Stonecrop

Of the orpine family (Crassulaceae), the ditch stonecrop or Penthorum sedoides.

Of the saxifrage family (Saxifragaceae), the early saxifrage or Saxifraga Virginiensis.

Early Saxifrage

Of the saxifrage family (Saxifragaceae), the early saxifrage or Saxifraga Virginiensis.

Of the saxifrage family (Saxifragaceae): left, false mitrewort (Tiarella cordifolia); right, naked mitrewort (Mitella nuda).

False Mitrewort and Naked Mitrewort

Of the saxifrage family (Saxifragaceae): left, false mitrewort (Tiarella cordifolia); right, naked mitrewort…

Of the saxifrage family (Saxifragaceae), the golden saxifrage or Chrysosplenium americanum.

Golden Saxifrage

Of the saxifrage family (Saxifragaceae), the golden saxifrage or Chrysosplenium americanum.

Of the saxifrage family (Saxifragaceae), the alumroot or Heuchera americana.

Alumroot

Of the saxifrage family (Saxifragaceae), the alumroot or Heuchera americana.

Of the saxifrage family (Saxifragaceae), the Grass of Parnassus or Parnassia caroliniana.

Grass of Parnassus

Of the saxifrage family (Saxifragaceae), the Grass of Parnassus or Parnassia caroliniana.

Of the rose family (Rosaceae), the meadowsweet or Spiraea latifolia.

Meadowsweet

Of the rose family (Rosaceae), the meadowsweet or Spiraea latifolia.

Of the rose family (Rosaceae), the hardhack or Spiraea tomentosa.

Hardhack

Of the rose family (Rosaceae), the hardhack or Spiraea tomentosa.

Of the rose family (Rosaceae): left, the queen-of-the-prairie or Filipendula rubra; right, goat's beard or Aruncus sylvester.

Queen-of-the-Prairie and Goat's Beard

Of the rose family (Rosaceae): left, the queen-of-the-prairie or Filipendula rubra; right, goat's beard…

Of the rose family (Rosaceae), the long-plumed avens or Geum triflorum.

Long-Plumed Avens

Of the rose family (Rosaceae), the long-plumed avens or Geum triflorum.

Of the rose family (Rosaceae), the slivery cinquefoil or Potentilla argentea.

Silvery Cinquefoil

Of the rose family (Rosaceae), the slivery cinquefoil or Potentilla argentea.

Of the rose family (Rosaceae), the Norway cinquefoil or Potentilla monspeliensis var. norvegica.

Norway Cinquefoil

Of the rose family (Rosaceae), the Norway cinquefoil or Potentilla monspeliensis var. norvegica.

Of the rose family (Rosaceae), the purple cinquefoil or Potentilla palustris.

Purple Cinquefoil

Of the rose family (Rosaceae), the purple cinquefoil or Potentilla palustris.

Of the rose family (Rosaceae): left, agrimony or Agrimonia gryposepala; right, cinquefoil or Potentilla canadensis var. simplex.

Agrimony and Cinquefoil

Of the rose family (Rosaceae): left, agrimony or Agrimonia gryposepala; right, cinquefoil or Potentilla…

Of the rose family (Rosaceae), the smooth rose or Rosa blanda.

Smooth Rose

Of the rose family (Rosaceae), the smooth rose or Rosa blanda.

Of the rose family (Rosaceae), the sweetbrier or Rosa rubiginosa.

Sweetbrier

Of the rose family (Rosaceae), the sweetbrier or Rosa rubiginosa.

Of the pulse family (Leguminosae): left, blue false indigo (Baptisia australis); right, wild indigo (Baptisia tinctoria).

Blue False Indigo and Wild Indigo

Of the pulse family (Leguminosae): left, blue false indigo (Baptisia australis); right, wild indigo…

Of the pulse family (Leguminosae), the rabbit-foot clover or Trifolium arvense.

Rabbit-Foot Clover

Of the pulse family (Leguminosae), the rabbit-foot clover or Trifolium arvense.

Of the pulse family (Leguminosae), the hop clover or Trifolium agrarium.

Hop Clover

Of the pulse family (Leguminosae), the hop clover or Trifolium agrarium.

Of the pulse family (Leguminosae), the alsike clover or Trifolium hybridum.

Alsike Clover

Of the pulse family (Leguminosae), the alsike clover or Trifolium hybridum.

Of the pulse family (Leguminosae), the alfalfa or Medicago sativa.

Alfalfa

Of the pulse family (Leguminosae), the alfalfa or Medicago sativa.

Of the pulse family (Leguminosae), the yellow melilot or Melilotus officinalis.

Yellow Melilot

Of the pulse family (Leguminosae), the yellow melilot or Melilotus officinalis.

Of the pulse family (Leguminosae), the milk vetch or Astragalus canadensis.

Milk Vetch

Of the pulse family (Leguminosae), the milk vetch or Astragalus canadensis.

Of the pulse family (Leguminosae), the tick trefoil or Desmodium nudiflorum.

Tick Trefoil

Of the pulse family (Leguminosae), the tick trefoil or Desmodium nudiflorum.

Of the pulse family (Leguminosae), the Canadian tick trefoil or Desmodium Canadense.

Canadian Tick Trefoil

Of the pulse family (Leguminosae), the Canadian tick trefoil or Desmodium Canadense.

Of the pulse family (Leguminosae), the bush clover, Lespedeza violacea.

Bush Clover

Of the pulse family (Leguminosae), the bush clover, Lespedeza violacea.

Of the pulse family (Leguminosae), the cow vetch or Vicia Cracca.

Cow Vetch

Of the pulse family (Leguminosae), the cow vetch or Vicia Cracca.

Of the pulse family (Leguminosae), the ground nut or Apios tuberosa.

Ground Nut

Of the pulse family (Leguminosae), the ground nut or Apios tuberosa.

Of the pulse family (Leguminosae): left, hog peanut (Amphicarpaea monoica); right, wild bean (Phaseolus polystachyus).

Hog Peanut and Wild Bean

Of the pulse family (Leguminosae): left, hog peanut (Amphicarpaea monoica); right, wild bean (Phaseolus…

Of the pulse family (Leguminosae): large image, the partridge pea with pods (Cassia Chamaecrista); leaves on left side, Strophostyles helvola.

Partridge Pea

Of the pulse family (Leguminosae): large image, the partridge pea with pods (Cassia Chamaecrista); leaves…

Of the geranium family (Geraniaceae): left, the herb Robert (Geranium Robertianum); right, Geranium Bicknelli.

Geranium Bicknelli and Herb Robert

Of the geranium family (Geraniaceae): left, the herb Robert (Geranium Robertianum); right, Geranium…

Of the geranium family (Geraniaceae): left, cranesbill (Geranium maculatum); right, Geranium Carolinianum.

Geranium Carolinianum and Cranesbill

Of the geranium family (Geraniaceae): left, cranesbill (Geranium maculatum); right, Geranium Carolinianum.

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), 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), 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), 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 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.