_alcaeoides_ (Michx.) Gray pale p. _digitata_ Nutt. finger p. _involucrata_ (T. & G.) Gray purple p. _Callitriche heterophylla_ Pursh waterstarwort _Camelina microcarpa_ Andrz. littlepod falseflax _Campanula americana_ L. American bellflower _Cannabis sativa_ L. hemp _Capsella bursa-pastoris_ (L.) Medic. shepherdspurse _Cardamine_ L. bittercress _bulbosa_ (Schreb.) BSP. bulb b. _parviflora_ L. smallflower b. _pensylvanica_ Muhl. Pennsylvania b. _Cardaria draba_ (L.) Desv. (_Lepidium draba_ L.) hoary cress _Carduus nutans_ L. muskthistle _Carthamus tinctorius_ L. safflower _Castilleja_ Mutis paintbrush _citrina_ Pennell citron p. _coccinea_ (L.) Spreng. indian p. _sessiliflora_ Pursh downy p. _Centaurea_ L. centaurea _americana_ Nutt. basketflower _cyanus_ L. cornflower _repens_ L. (_C. picris_ Pall.) Russian knapweed _solstitialis_ L. yellow c. _Cerastium_ L. cerastium _brachypodum_ (Engelm.) Robins. shortstalk c. _nutans_ Raf. powderhorn c. _vulgatum_ L. big c. _Ceratophyllum demersum_ L. hornwort _Chaerophyllum_ L. chervil _procumbens_ (L.) Crantz spreading c. _reflexum_ Bush. reflexed c. _texanum_ C. & R. Texas c. _Chamaesaracha_ Gray falsenightshade _conioides_ (Moric.) Britt. _coronopus_ (Dunal) Gray green f. _Chamaesyce_ (included in _Euphorbia_) _Chenopodium_ L. goosefoot _albescens_ Small pale g. _album_ L. lambsquarters _ambrosioides_ L. wormseed g. _berlandieri_ Moq. pitseed g. _boscianum_ Moq. goosefoot _cycloides_ A. Nels. sandhill g. _fremontii_ S. Wats. fremont g. _glaucum_ L. oakleaf g. _hybridum_ L. var. _gigantospermum_ (Aellen) Rouleau mapleleaf g. _incanum_ (S. Wats.) Heller _leptophyllum_ Nutt. slimleaf g. _murale_ L. nettleleaf g. _petiolare_ HBK. _salinum_ Standl.