Part 4, 1924] FABACEAE: GALEGEAE 205 



6. Sesban Sonorae Rydberg, sp. nov. 



Sesbania macrocarpa picla S. Wats. Proc. Am. Acad. 24: 46. 1889. Not Sesban piclus Poir. 1806. 

 Sesban macrocarpa Standley, Contr. U. S. Nat. Herb. 22: 477. 1922. 



An annual; stem 3-10 dm. high, striate, glabrous; stipules lance-subulate, 4 mm. long, 

 caducous; leaves 5-10 cm. long; leaflets 16-20, linear-oblong, 1-2.5 cm. long, 3-6 mm. wide, 

 glabrous, rounded or obtuse at each end or retuse at the apex; racemes 2-7 cm. long, 2-5- 

 flovvered; bracts and bractlets narrowly linear; pedicels about 5 mm. long; calyx as in the 

 preceding; corolla about 15 mm. long, pale-yellow, the banner usually purple-streaked and 

 purple-dotted; blades of the wings broadly obliquely oblanceolate, with a triangular basal 

 auricle; those of the keel-petals with a small tooth-like basal auricle; pod 10-15 cm. long, 3 mm. 

 wide, 15-20-seeded; seeds 4 mm. long, 2 mm. high. 



Type locality: Guaymas, Sonora. 



Distribution: Arizona, southern California, Sonora, Sinaloa, and Lower California. 



7. Sesban sericeus (Willd.) Britton & Wilson, Sci. Surv. 

 Porto Rico 5: 395. 1924. 



Coronilla sericea Willd. Enum. 773. 1809. 



Sesba7iia sericea Link, Enum. 2: 244. 1822. 



Agati sericea Hitchc. Rep. Mo. Bot. Card. 4: 75. 1893. 



Stem sufTrutescent below, slightly angled, more or less pubescent, sometimes slightly 

 spiny; stipules subulate, 5 mm. long; leaves 5-15 cm. long; leaflets 20-40, oblong, rounded at 

 both ends, mucronate, 1-2.5 cm. long, 3-6 mm. wide, glabrous above, silky-villous beneath; 

 racemes 2-6 cm. long, 1-6-flowered; bracts and bractlets linear-lanceolate, acuminate; calyx 

 5 mm. long and broad, glabrous, the lobes deltoid, short-acuminate, fully 1 mm. long; corolla 

 dull-yellow, 9-12 mm. long; blades of the wings oblong-oblanceolate, those of the keel-petals 

 with an acute basal auricle; pod 10-16 cm. long, 3 mm. wide, 20-30-seeded; seeds 3 mm. long, 

 2 mm. high. 



Type locality: Unknown. 



Distribution: Houston, Texas; British Guiana; West Indies; native of Ceylon. 



9. AGATI Adans. Fam. PI. 2: 326. 1763. 



Resupinaria Raf. Sylva Tell. 115. 1838. 



Small trees. Leaves abruptly pinnate, with many leaflets and lanceolate caducous 

 stipules. Flowers large, in small axillary racemes, with a caducous bract at the base of the 

 pedicel and two bractlets under the calyx. Calyx campanulate, truncate, slightly bilabiate, 

 the upper lip with 2, the lower with 3 short or obsolete lobes. Banner clawed, with an oblong 

 blade, shorter than the wings. Wings and keel-petals almost equal, clawed, with lunate, 

 acutish blades, the latter united at the middle along the lower edge. Stamens diadelphous, 

 the staminal sheath with large rounded auricles near the base. Style filiform, glabrous. Pod 

 linear, elongate, compressed, somewhat 4-angIed by the thick sutures, with partitions between 

 the seeds, short-stipitate ; seeds oblong-reniform. 



Type species, Robinia grandiflora L. 



1. Agati grandiflora (L.) Desv. Jour, de Bot. Desv. 

 II. 1: 120. 1813. 



Robinia grandiflora L. Sp. PI. 722. 1753. 

 Aeschynomene grandiflora L. Sp. PI. ed. 2. 1060. 1763. 

 Aeschvnomene coccinea L.f. Suppl. 330. 1781. 

 Coronilla grandiflora Willd. Sp. PI. 3: 1145. 1803. 



