UMass Extension Weed Herbarium

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Common Name Scientific Name Family Name
cocklebur Xanthium strumarium Asteraceae (Compositae) - Aster or Sunflower Family
cockspur grass see - barnyard grass
coltsfoot Tussilago farfara Asteraceae (Compositae) - Aster or Sunflower Family
compass plant see - lettuce, prickly
compass weed see - lettuce, prickly
copper-leaf, rhombic Acalypha rhomboidea Euphorbiaceae - Spurge Family
cottonweed Froelichia gracilis Amaranthaceae - Amaranth Family
couchgrass see - quackgrass
cow parsnip Heracleum lanatum Apiaceae (Umbelliferae) - Carrot Family
cowbane see - water hemlock, spotted
cowcress see - pepperweed, field
crabgrass, hairy see - crabgrass, large
crabgrass, large Digitaria sanguinalis Poaceae (Graminae) - Grass Family
crabgrass, silver see - goosegrass
crabgrass, small see - crabgrass, smooth
crabgrass, smooth Digitaria ischaemum Poaceae (Graminae) - Grass Family
cranesbill, spotted see - geranium, wild
creeping Charlie see - ivy, ground
creeping Jenny see - moneywort
cress, mouse-ear Arabidopsis thaliana Brassicaceae (Cruciferae) - Mustard Family
cress, winter see - rocket, yellow
crowfoot see - buttercup, smallflower
crowfoot see - goosegrass
crowfoot, kidney-leaved see - buttercup, smallflower
crowfoot, smooth-leaved see - buttercup, smallflower
crowfoot, tall see - buttercup, tall
crown vetch, trailing Coronilla varia Fabaceae (Leguminosae) - Pea or Bean Family
cuckooflower see - bittercress, cuckoo
cuckooflower see - ragged robin
cucumber, wild Echinocystis lobata Cucurbitaceae - Gourd Family
cup plant Silphium perfoliatum Asteraceae (Compositae) - Aster or Sunflower Family
cypress, mock see - kochia
cypress, summer see - kochia

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