251. (220.) Leaflets 3. 252 Leaflets 4 or more. 330 252. Leaves digitate. 253 Leaves pinnate. 264 253. Uppermost stamen united with the others into a tube or sheath. Ovules numerous. Bracteoles bristle-like. 254 Uppermost stamen free from the others, at least at the base. 257 254. Filaments united into a closed tube. Seeds with an outgrowth at the hilum. Herbs or hairy shrubs. 255 Filaments united into a sheath split above. Seeds without an outgrowth at the hilum. Glabrous undershrubs, shrubs, or trees. 256 255. Calyx-lobes unequal, the upper approaching in pairs. Standard spatulate; wings obliquely ovate. Anthers slightly unequal. Fruit ovate-lanceolate, dehiscing by two valves. Tall shrubs with brownish hairs. Flowers in head-like spikes. (See 175.) =Phaenohoffmannia= O. Ktze. Calyx-lobes subequal. Standard ovate or oblong; wings narrow; petals of the keel scarcely cohering. Fruit linear or lanceolate, dehiscing at the upper suture. Decumbent herbs. Flowers very small, solitary or in short racemes.--Species 1. Central Africa. =Rothia= Pers. 256. Keel longer than the standard. Fruit ovate-lanceolate, few-seeded. Undershrubs. (See 194.) =Loddigesia= Sims Keel shorter than the standard. Fruit linear, many-seeded. Shrubs or trees. (See 194.) =Hypocalyptus= Thunb. 257. Uppermost stamen united with the others in the middle, at least when young. 258 Uppermost stamen free. Bracteoles absent. 260 258. Petals, at least the four lower ones, adnate below to the staminal tube. Fruit not jointed, scarcely dehiscent. Herbs. Leaflets usually toothed. Stipules adnate to the leafstalk. Flowers solitary or in spikes, heads, or umbels. Bracteoles absent. (See 138.) =Trifolium= L. Petals free from the staminal tube. Ovary sessile. Fruit flat. Leaflets entire. 259 259. Flowers very small, solitary or in pairs in the axils of the leaves, with small bracteoles. Petals yellowish. Fruit oblong; pericarp membranous. Undershrubs. (See 232.) =Sylitra= E. Mey. Flowers not very small, in racemes, without bracteoles. Petals usually red. Fruit dehiscing by two valves; pericarp more or less herbaceous. (See 233.) =Tephrosia= Pers. 260. Connective of the stamens ending in a gland, a tuft of hairs, or a small point. Keel gibbous or spurred on each side. Fruit transversely septate, dehiscing by two valves. Plants with appressed hairs fixed by the middle. (See 215.) =Indigofera= L. Connective without an appendage. 261 261. Ovule 1. Keel curved. Fruit ovate, indehiscent; pericarp adhering to the seed. Gland-dotted plants. (See 153.) =Psoralea= L. Ovules 2 or more. 262 262. Ovules 2. Petals free from the staminal tube; standard auricled at base. Fruit turgid, 1-celled, 2-valved. Shrubs. (See 250.) =Flemingia= Roxb. Ovules 3 or more, rarely 2, but then lower petals adnate to the staminal tube. Wings exceeding the keel. Herbs. Stipules adnate to the leafstalk. 263