204 NORTH AMERICAN FLORA [Volume 24 



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

 Sesbania muricata Macfad. Fl. Jam. 1: 257. 1837. 

 Sesbania bispinosa Spreng.; Steud. Nom. ed. 2. 2: 572. 1841. 

 Emerus Sesban aculeata Kuntze, Rev. Gen. 181. 1891. 



Stem 2-3 m. high, shrubby at the base, glabrous, usually more or less armed with short 

 prickles, somewhat angled; stipules linear-subulate, caducous; leaves 1-3 dm. long; rachis 

 glabrous, often prickly; leaflets 40-SO, linear-oblong, 1-1.5 cm. long, 2-3 mm. wide, glabrous, 

 rounded at each end, mucronate; racemes lax, 1-1.5 dm. long, 3-IO-flowered; bracts and 

 bractlets subulate, caducous; pedicels about 1 cm. long; calyx 5 mm. high, 4 mm. broad, the 

 lobes deltoid, acute, 1 mm. long; corolla 10-12 mm. long, pale-yellow; banner dotted with 

 reddish-brown, rarely orange throughout; blades of the wings oblanceolate, rounded at the 

 apex, with a lanceolate basal auricle; those of the keel-petals with a sharp basal auricle; pod 

 1.5-2 dm. long, 3 mm. wide, 35-45-seeded; seeds 3 mm. long, 1.5 mm. high, brown. 



Type locality: Egypt. 



Distribution: Southern Mexico; Jamaica; Porto Rico; Lesser Antilles; Curacao; native of 

 tropical Africa and Asia, and China. y 



Illustration: Jacq. Ic. PI. Rar. pi. 564. 



4. Sesban Emerus (Aubl.) Britton & Wilson, Sci. Surv. 

 Porto Rico 5: 395. 1924. 



Aeschvnomene Emerus Aubl. PI. Guian. 775. Tabl. Nomsl. 1775. 



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



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



Sesbania occidentalis Pers. Syn. PI, 2: 316. 1807. 



? Sesbania macrocarpa Muhl.; Ell. Bot. S. C. & Ga. 2: 221. 1823. 



Emerus Sesban occidentalis Kuntze, Rev. Gen. 181. 1891. 



Sesbania Emerus Urban, Repert. Sp. Nov. 16: 149. 1919. 



Stem shrubby, at least at the base, 2-5 m. high, glabrous, more or less angled; stipules 

 linear-subulate, caducous; leaves 7-18 cm. long; leaflets 24-50, linear oblong, 1.5-3 cm. long. 

 3-7 mm. wide, rounded at each end, glabrous or with a few scattered hairs when young; 

 racemes 5-10 cm. long, much shorter than the leaves, 3-6-flowered; bracts and bractlets linear, 

 5 mm. long, caducous; calyx about 8 mm. long, 7 mm. wide; lobes with a triangular base, 

 acuminate, 2-2.5 mm. long, more or less mottled; corolla yellow, 15-20 mm. long; banner 

 dotted with dark-purple; wings oblong-oblanceolate; blades of the keel-petals with a triangular 

 basal auricle; pod straight, about 2 dm. long, 3.5-4 mm. wide, 30-40-seeded; seeds oblong, 

 3 mm. long, 2 mm. wide. 



Type locality: Not given. 



Distribution: Florida; Veracruz; Morelos; Guatemala; Panama; West Indies. 



Illustration: Plumier, PI. Am. pi. 125. 



5. Sesban exaltatus (Raf.) Rydberg. 



Darwinia exallala Raf. Fl. Ludov. 106. 1817. 



Sesbania macrocarpa Muhl. (Cat. 65, hyponym. 1813); Nutt. Gen. 2: 112. 1818. 



An annual; stem glabrous, terete or slightly angled, 1-4 m. high; stipules linear-lanceolate, 

 1 cm. long, caducous; leaves 12-30 dm. long; leaflets 30-70, linear-oblong, rounded and mu- 

 cronate at the apex, acute or obtuse at the base, 1-2.5 cm. long, 3-6 mm. wide, glabrous, 

 somewhat glaucous beneath; racemes 2-10 cm. long, 2-6-flowered; bracts and bractlets linear- 

 subulate, caducous; calyx about 5 mm. long and broad, the lobes with a triangular base and a 

 subulate tip, nearly 2 mm. long; corolla yellow or the banner sometimes turning pink-purple; 

 banner 12-15 mm. long; blades of the wings oblanceolate, with a triangular basal auricle, 

 those of the keel-petals with a sharp basal auricle; pod 1.5-2 dm. long, 3 mm. broad, glabrous, 

 30-40-seeded; seeds 3-4 mm. long, 1.5-2 mm. high. Perhaps a northern variety of S. occident- 

 alis. 



Type locality: New Orleans, Louisiana. 

 Distribution: Missouri to Louisiana and Texas. 

 Illustration: W. Barton. Fl. N. Am. pi. 2X. 



