really need a hand lens to view the two characteristics feature: 1) achene 瘦果 and 2)cystolith 鐘乳體
F. simplicissima: Achenes tuberculate or rugose, basally with double keels; male flowers always near apical pore; leaf blade
F. hirta: Achenes smooth, not or only slightly keeled; male flowers scattered or near apical pore; leaf blade with
cystoliths at least abaxially.
Reference: Zhou Zhekun & Gibert, M. (2003) Flora of China 5: 21-73.
[ 本帖最後由 Sze 於 2007-2-18 22:43 編輯 ]