sulphur, T. ochroleucon 硫磺三叶草
white, T. repens 白三叶草
cockspur grass, Echinochlia crus-galli 稗
coco grass, Cyperus rotundus 香附
cogon, Imperata cylindica 丝茅
coltsfoot, Tussilago farfara 款冬
comfrey, common, Symphytum officinale 聚合草
white, S. orientale 东方聚合草
corncockle, Agrostemma githago 麦仙翁
cornflower, Centaurea cyanus 矢车菊