140 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Style glabrous or pilose below; upper sta- 

 men free; leaves gland-dotted. (Cajan- 



INAE.) 



Seeds 4 to many. 

 Seeds 2, very rarely 3. 

 Style bearded longitudinally on the inner 

 side or penicillate at the apex. (Phaseo- 

 linae.) 



Keel twisted spirally. 

 Keel truncate or with a curved beak, 

 not spirally twisted. 



Stigma subsessile, oblique, inflexed 

 or inserted below the apex of the 

 style. 



Stigma very oblique, inflexed. 

 Stigma subsessile, on the inner 

 side of the style which is 

 dilated at the apex. 

 Stigma terminal, not oblique. 



62. Cajanus (p. 210). 



63. Rhynchosia (p. 211). 



64. Phaseolus (p. 213). 



65. Vigna (p. 216). 



66. Pachyrhizus (p. 218). 



67. Dolichos (p. 219). 



DESCRIPTIONS OF THE GENERA AND SPECIES. 



1. INGA Scop. 



Inga Scop. Introd. 298. 1777. 

 Arnosa Neck. Elem. 2: 459. 1790. 



Flowers 5 or 6-merous; calyx tubular or campanulate, dentate or broadly lobed; 

 corolla tubular or funnel-shaped, the petals connate to the middle or beyond it; 

 stamens indefinite, more or less united and forming a tube, long-exserted ;. ovary 

 sessile; seeds numerous; legume linear, straight or somewhat curved, flat, quadrangu- 

 lar or almost terete, coriaceous or somewhat fleshy, almost always with thickened 

 sutures, sub-dehiscent, pulpy between the seeds or rarely without pulp. Trees or 

 -shrubs with pinnate leaves; rachis winged between the leaflets or sometimes not, 

 almost always bearing sessile or stipitate glands; flowers often very large and tomen- 

 tose, in umbels or globose heads, sometimes in oval elongated spikes, solitary or in 

 fascicles, axillary or in crowded compound racemes on the ends of the branches. 



KEY TO THE SPECIES. 



Stem, leaves, and (lowers rusty brown tomentose or pubescent; 



rachis winged between the leaflets. 1. / vera. 



Stem, leaves, and flowers glabrous; rachis not winged between the 



leaflets. 2. /. laurina. 



1. Inga vera Willd. 



(Urban, 263.) a 



A large tree; leaflets 1 to 6-jugate, oval or elliptical-oblong, the largest 17 cm. long, 

 7 cm. wide, sessile, spikes 10 to 13 cm. long; flowers 4.5 to 5.5 cm. long; calyx 1 cm. 

 long; corolla 1.5 cm. long; stamens while, legume about 20 cm. long. 



In woods near Bayamon; near dwellings on Mounl Jimenez, at Sierra de Luquillo; 

 near Los Mameyes; between Aguas Buenas and Caguas, along roads; on Mount. Mesa, 

 near Mayaguez. Jamaica, Haiti, Trinidad (Grisebach), Central America, Colombia. 



a The references under the species names are to the full synonymy given by Urban, 

 Symbolae Antillanae, volume 4. All the pages cited. 262 to 312, were issued in 1905. 



