C. vulgaris may refer to:
Calluna vulgaris ([common] heather), the sole species within the genus Calluna Carlina vulgaris, a thistle species Chara vulgaris, a green alga species Chlorella vulgaris, a green microalga species Crupina vulgaris, a daisy species
Synonyms Crago vulgaris or Crangon vulgaris, synonyms for Crangon crangon, a shrimp species
See also Vulgaris (disambiguation)