Leguminosae. 45 



RHAM'NUS FRAN'GULA (58). Leaves obovate entire, branches not 

 (317) thorny, flowers 5-cleft perfect, berries black when ripe. Woods and 

 thickets. 



ORDER 22. — Leguminosse. 



Calyx gamosepalous 5-partite. Corollo polypetalous irregular (papiliona- 

 ceous) perigynous. Stamens lo perigynous, filaments united. Pistil superior 

 of one carpel. Style incurved. Stigma simple. Fruit a legume. Seeds one 

 or many, exalbuminous. Leaves alternate usually compound, stipulate. 



Stamens monadelphous, 207 



Stamens diadelphous (upper stamen free, the rest united), 208 



207 Leaves simple, 209 



207 Leaves compound, 210 



208 Leaves ternate, 2H . 



208 Leaves pinnate or ternate with leafy stipules, 213 ^Mj2_^ [s^-iJjNtA, o^u^ € 



209 Calyx nearly as long as the corolla, with bracts, Ulex IL 



209 Calyx much shorter than the corolla, without bracts, Genista I IL 

 210 Lower leaves ternate, 214 

 210 Leaves pinnate, , Anthyllis VI. 



211 Flowers in racemes, 215 



(in Medicago lupulina apparently in heads) 



211 Flowers in heads, 212 



212 Pod much longer than calyx, .... Trigonella XIII. 



212 Pod seldom exceeding calyx, .... Trifolium IX. 



213 Leaves with a terminal leaflet (unequally pinnate), 216 



213 Leaves equally pinnate, 219 



214 Calyx 2-lipped, , Cytisus I. 



214 Calyx campanulate 5-cleft, ... , Ononis V. 



215 Racemes equal, ..... Medicago VII. 



215 Racemes one-sided long, . . . Melilotus VIII. 



216 Peduncles with a terminal leaf, 220 

 216 Peduncles without a terminal leaf, 217 



217 Flowers in racemes, 218 



217 Flowers in umbels, .... Hippocrepis XIV. 



218 Flowers pink, Onobrychis XII. 



218 Flowers yellow, Astragalus iV. 



219 Style round, hairy on the lower side or on both, Vicia XV. 



219 Style flat, hairy only on the upper or inner side, Lathyrus XVI. 



220 Flowers yellow, . Lotus X. 



220 Flowers pink, .... . . Ornithopus XL 



