Weed Herbarium – by Scientific Name

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Calystegia
Calystegia sepium hedge bindweed Convolvulaceae - Morningglory Family
Capsella
Capsella bursa-pastoris shepherd's-purse Brassicaceae (Cruciferae) - Mustard Family
Cardamine
Cardamine hirsuta bittercress Brassicaceae (Cruciferae) - Mustard Family
Cardamine pratensis cuckoo bittercress Brassicaceae (Cruciferae) - Mustard Family
Carduus
Carduus arvensis see - Cirsium arvense
Carduus
Carduus vulgare see - Cirsium vulgare
Celastrus
Celastrus orbiculatus oriental bittersweet Celastraceae - Stafftree Family
Cenchrus
Cenchrus longispinus longspine sandbur Poaceae (Graminae) - Grass Family
Centaurea
Centaurea maculosa spotted knapweed Asteraceae (Compositae) - Aster or Sunflower Family
Cerastium
Cerastium fontanum see - Cerastium vulgatum
Cerastium viscosum see - Cerastium glomeratum
Cerastium glomeratum sticky chickweed Caryophyllaceae - Pink Family
Cerastium vulgatum mouse-ear chickweed Caryophyllaceae - Pink Family
Chamaesyce
Chamaesyce maculata see - Euphorbia maculata
Chelidonium
Chelidonium majus greater celandine Papaveraceae - Poppy Family
Chenopodium
Chenopodium album common lambsquarters Chenopodiaceae - Goosefoot Family
Chenopodium ambrosioides wormseed Mexicantea Chenopodiaceae - Goosefoot Family
Chenopodium pumilio clammy goosefoot Chenopodiaceae - Goosefoot Family
Chrysanthemum
Chrysanthemum leucanthemum oxeye daisy Asteraceae (Compositae) - Aster or Sunflower Family
Cichorium
Cichorium intybus chicory Asteraceae (Compositae) - Aster or Sunflower Family
Cicuta
Cicuta maculata spotted water hemlock Apiaceae (Umbelliferae) - Carrot Family
Circaea
Circaea lutetiana see - Circaea quadrisulcata
Circaea quadrisulcata enchanter's nightshade Onagraceae - Evening Primrose Family
Cirsium
Cirsium arvense Canada thistle Asteraceae (Compositae) - Aster or Sunflower Family
Cirsium vulgare bull thistle Asteraceae (Compositae) - Aster or Sunflower Family
Claytonia
Claytonia virginica narrowleaf spring beauty Portulacaceae - Purslane Family
Clematis
Clematis virginiana virgin's bower Ranunculaceae - Buttercup Family
Collinsonia
Collinsonia canadensis horsebalm Lamiaceae (Labiatae) - Mint Family
Commelia
Commelia communis asiatic dayflower Commelinaceae - Spiderwort Family
Convolvulus
Convolvulus sepium see - Calystegia sepium
Convolvulus arvensis field bindweed Convolvulaceae - Morningglory Family
Conyza
Conyza canadensis horseweed Asteraceae (Compositae) - Aster or Sunflower Family
Coronilla
Coronilla varia trailing crown vetch Fabaceae (Leguminosae) - Pea or Bean Family
Crepis
Crepis tectorum narrowleaf hawksbeard Asteraceae (Compositae) - Aster or Sunflower Family
Cuscuta
Cuscuta spp. dodder Convolvulaceae - Morningglory Family
Cymbalaria
Cymbalaria muralis Kenilworth ivy Scrophulariaceae - Figwort Family
Cynanchum
Cynanchum lousieae see - Cynanchum nigrum
Cynanchum nigrum black swallowwort Asclepiadaceae - Milkweed Family
Cynanchum rossicum pale swallowwort Asclepiadaceae - Milkweed Family
Cyperus
Cyperus esculentus yellow nutsedge Cyperaceae - Sedge Family