The seed morphological characteristics of 17 Corydalis
DC.taxa(Papaveraceae) from Hubei Province of China were examined by light microscopy and their taxonomic significance was evaluated.Seeds examined were suborbicular,oblate,or reniform,0.87-2.12 mm long,0.99-2.06 mm wide,black or dark brown,with elaiosome.Elaiosome large or small,galericulate,flabellate,clavate,and irregular,folded back over seed or not.Based on the features of the seed surface,four types of seeds were identified:(i) smooth(C.temulifolia
(Lam.)Pers.);(ii) spinulose or with small tubercles(C.wilfordii
Hand.-Mazz.);(iii) finely reticulate with small pitted or linear depressions(C.incisa
(Y.H.Chou et C.C.Hsu) W.T.Wang ex Z.Y.Su et C.Y.Wu);and(iv) with pitted depressions and covered with small tubercles(C.decumbens
(Thunb.) Pers.).These results provide diagnosing data for the taxonomy of Corydalis
at specific levels.Seed morphological features of several newly recorded taxa from Hubei Province are reported and their possible implication for determination is discussed.