49 6 AMERICAN JOURNAL OF BOTANY [Vol. 10, 



Pods 2-seeded, with thin margins, lance-elliptic; seeds oblong- 

 reniform enclosed in the inner membranous layer of the 

 valves; calyx decidedly oblique. 12. Glottidium. 



Pod 4-angled, often 4-winged, not torulose. II. Daubentonia. 



8. Sesban Adans. Fam. 2:327. 1763 



Herbs or shrubs with abruptly pinnate leaves and numerous leaflets. 

 The flowers are borne in axillary racemes, with deciduous bracts, and a pair 

 of deciduous bractlets under the flowers. The corolla is yellow or the 

 banner dotted, streaked, or tinged with purple. The banner has often one 

 or two callosities at the base of the suborbicular reflexed blade; the wings 

 are short-clawed, the blades obliquely oblanceolate or oblong, with a basal 

 auricle; the keel-petals have long claws, the blades are strongly and broadly 

 lunate with a lateral auricle on the upper side. The pod is slender, terete 

 or slightly compressed, short-stipitate, many-seeded, with cross-partitions 

 between the seeds, 2-valved. Seeds cylindro-oblong, subtruncate at the 

 ends. 



Illustration: Plate XXXIV H. Sesban Sesban (L.) Rydb., X 1/2; 

 I. calyx, 2. stamens, 3. pistil, X 2; 4. banner, 5. wing, 6. keel-petal, X 1; 

 7. pod, X 1/2; 8. cross section of pod; 9. seed, X 2. 



The genus was established on Aeschynomene Sesban L. Scopoli (Introd. 

 308. 1777) changed the name to Sesbania, the latter being better Latin 

 form. 



Synonyms : 

 Darwinia Raf. Fl. Ludov. 106. 1817. Type: D. exaltata Raf., which has 



been known under the name Sesbania macrocarpa Muhl. 

 Monaplectra Raf. Fl. Ludov. 106. 18 17. This was proposed instead of 



Darwinia in case the latter happened to be preoccupied. 



The genus consists of perhaps 20 species of the warmer regions of both 

 hemispheres. It is represented in North America by 4 native and 3 intro- 

 duced species. 



9. Agati Adans. Fam. 2:326. 1763 



Small trees, having abruptly pinnate leaves, with many entire leaflets 

 and deciduous stipules. The flowers are large, borne in small axillary 

 racemes, and with two deciduous small bractlets subtending the calyx. The 

 calyx is in structure the same as in Sesban. The petals are comparatively 

 narrower, the banner is without callosities, its blade oval in outline, and 

 retuse at the apex; the blades of the wing- and keel-petals are obliquely 

 lanceolate-lunate, tapering at the base without any distinct auricle. The 

 staminal sheath and the pistil resemble also those of Sesban, except that 

 they are more gradually arcuate. The pod is the same as in that genus. 



Illustration: Plate XXXV I. Agati grandiflora (L.) Desv., X 1/2; 

 1. stamens, 2. pistil, 3. banner, 4. wing, 5. keel-petal, X 1/2; 6. pod, X 1/4; 

 7. cross section of the same, X 1 ; 8. seed in position in the pod, X I. 



The genus was based on Robinia grandiflora L. 



Synonym : 

 Resupinaria Raf. Sylva Tell. 115. 1838. Type: R. grandiflora Raf. or 



Robinia srandifiora L. 



