Part 4, 1924] FABACEAE: GALEGEAE 203 



Corolla 15 mm. long or less; plant herbaceous, annual. 



Leaflets 30-70; pod 30— 10-seeded ; calyx-lobes with subulate 



tips. 5. 5. exaltatus. 



Leaflets 16-30; pod 1 5-30-seeded ; calyx-lobes short-acu- 

 minate. 6. 5. Sonorae. 

 Leaves beneath and stem silky-villous. 7. S. sericeus. 



1. Sesban Sesban (L) Britton, Brooklyn Bot. Gard. 

 Mem. 1: 54! 1918. 



Aeschynomene Sesban L. Sp. PI. 714. 1753. 



Aeschvnomenc picta Cav. Ic. 4: 7. 1797. 



Coronilla Sesban Willd. Sp. PI. 3: 1 147. 1803. 



Coronilla picta Willd. Sp. PI. 3: 1148. 1803. 



Sesban aegyptiacus Poir. in Lam. Encyc. 7: 128. 1806. 



Sesban piclus Poir. in Lam. Encyc. 7: 129. 1806. 



Sesbania aegvpliaca Pers. Syn. PI. 2: 316. 1807. 



Sesbania picta Pers. Syn. PI. 2: 316. 1807. 



Emerus Sesban Kuntze, Rev. Gen. 180. 1891. 



Sesbania Sasban Fawcett & Rendle, Fl. Jam. 4: 23. 1920. 



An herb or soft-wooded shrub, 2-3 m. high; branches glabrous, or sparingly hairy on the 

 younger parts; stipules linear-lanceolate, caducous; leaves S— 15 cm. long; leaflets 20-30, 

 glabrous, linear-oblong, pale-green, 2-3 cm. long, 4-6 mm. wide, rounded at each end, mil- 

 cronate; racemes usually equaling or exceeding the leaves, 5-12-flowered; bracts and bractlets 

 linear-subulate, early caducous; calyx 4-5 mm. high, 6 mm. broad, the lobes broadly triangular, 

 acute, less than 1 mm. long; corolla yellow, the banner usually streaked or dotted with dark- 

 purple or sometimes (var. piclus) tinged with purple; banner about 15 mm. long; wings 

 broadly obliquely oblanceolate, with a rounded basal auricle; keel-petals with a triangular 

 basal auricle; pod linear, 12-20 cm. long, 3 mm. wide, somewhat twisted, slightly torulose, 

 15-30-seeded; seeds oblong, 3.5-4 mm. long, about 2 mm. high, brown. 



Type locality: Egypt. 



Distribution: West Indies; also in Guiana; native of tropical and subtropical Africa and 

 Asia. 



Illustrations: Cav. Ic. pi. 314; Bot. Reg. pi. 873; Am. Jour. Bot. 10: pi. 34 H. 



2. Sesban exasperatus (H.B.K.) Rydberg. 



Sesbania exasperata H.B.K. Nov. Gen. & Sp. 6: 534. 1823. 



Lotus pahtstris Veil. Fl. Flum. 315. 1825. 



Sesbania dubia Steud. Nom. ed 2. 2: 572. 1841. Not 5. dubia H.B.K. 1825. 



Emerus exasperatus Kuntze, Rev. Gen. 1: 181. 1891. 



A shrub, 1-3 m. high; branches angled, striate, glabrous; stipules lanceolate, 8 mm. long; 

 leaves 1.5-2 dm. long; leaflets 50-60, linear-oblong, rounded at each end, mucronate, glabrous, 

 1: b -.- reen and often black-dotted above, glaucescent beneath, 1 1-25 mm. long, 3-5 mm. wide; 

 rachis sometimes slightly minutely prickly on the back; racemes 3-6-9owered, half as long as 

 the leaves; pedicels 6-10 mm. long; bracts and bractlets linear-lanceolate, 4-5 mm. long, ca- 

 ducous; calyx glabrous, yellowish, red-dotted, 7-8 mm. long, the lobes deltoid, short-acuminate, 

 3 mm. long; banner IS— 25 mm. long, the blade yellow, red-striate; wings and keel pale-yellow; 

 bla.ks of the former obliquely oblong, obtuse, with a deltoid subulate-tipped basal auricle; 

 those of the keel-petals with a broadly deltoid basal auricle; pod 1.5-2.5 dm. long, 4-6 mm. 

 "-40-seeded; seeds 4-5 mm. long, 2-2.5 mm. high, brown, shining. 



Typb locality: Sandy places along Apure River, Venezuela. 



Distribution: Nicaragua; Jamaica; St. Kitts;alsoin South America, from Trinidad to Colombia 

 and Paraguay. 



Illustration: Veil. Fl. Flum. Ic. 7: pi. 137. 



3. Sesban bispinosus (Jacq.) Rydberg. 



Aeschynomene Sesban Jacq. Coll. 2: 283. 1788. Not A. Sesban L. 1753. 

 Aeschynomene bispinosa Jacq. Ic. PI. Rar. 3: 13. 1793. 

 Coronilla aculeala Willd. Sp. PI. 3: 1147. 1803. 

 Sesban aculealus Poir. in Lam. Encyc. 7: 128. 1806. 



