 Cup-plant (Silphium perfoliatum) |
 Common St. john's-wort (Hypericum perforatum) |
 Corn gromwell (Lithospermum arvense) |
 Aster, Ciliolate (Aster ciliolatus) |
 Aster, New England (Aster novae-angliae) |
 Aster, New England (Aster novae-angliae) |
 Aster, Panicled (Aster lanceolatus) |
 Barren-ground-strawberry (Waldsteinia fragarioides) |
 Bellwort (Uvularia grandiflora) |
 Bellwort (Uvularia grandiflora) |
 Bird's-foot trefoil (Lotus corniculatus) |
 Bladder campion (Silene vulgaris) |
 Bladder campion (Silene vulgaris) |
 Bloodroot (Sanguinaria canadensis) |
 Bloodroot (Sanguinaria canadensis) |
 Blue vervain (Verbena hastata) |
 Broad-leaved Arrowhead (Sagittaria latifolia) |
 Bur-reed (Sparganium) |
 Bur marigold, Nodding (Bidens cernua) |
 Canada thistle (Cirsium arvense) |
 Canada thistle (Cirsium arvense) |
 Catnip (Nepeta cataria) |
 Celandine (Chelidonium majus) |
 Celandine (Chelidonium majus) |
 Charlock (Brassica kaber) |
 Chicory (Cichorium intybus) |
 Chicory (Cichorium intybus) |
 Clammy ground-cherry (Physalis heterophylla) |
 Clammy ground-cherry (Physalis heterophylla |
 Clover, Red (Trifolium pratense) |
 Clover, White (Trifolium repens) |
 Common milkweed (Asclepias syriaca) closeup |
 Common milkweed (Asclepias syriaca |
 Common milkweed (Asclepias syriaca) |
 Common milkweed (Ascelpias syriaca) seeds |
 Common St. Johns-wort (Hypericum perforatum) |
 Common St. Johns-wort (Hypericum perfoliatum) |
 Comfrey (Symphytum officinale) |
 Comfrey (Symphytum officinale) |
 Comfrey (Symphytum officinale) |
 Comfrey (Symphytum officinale) |
 Coneflowers (Echinacea purpurea) and Black-eyed susan () |
 Cow vetch (Vicia cracca) |
 Creeping bellflower (Campnula rapunculoides) |
 Curled dock (Rumex crispus) |
 Curled dock (Rumex crispus) seeds |