218 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



long, yellow; pedicel 2 mm. long; bracts and bracteoles very minute; calyx cam- 

 panulate, glabrous, 4 mm. deep; teeth deltoid, shorter than the tube; corolla 1 to 1.2 

 cm. long; standard glabrous on the back; pod 3.7 to 5 cm. long, slightly recurved, 

 glabrescent or thinly silky. 



Near Bayamon in grassy plains; near Patillas in coast districts at Guc'daraya; near 

 Sabana Grande, on the bank of Estero River; near Salinas de Cabo Rojo at Los Morillos; 

 near Mayaguez; in coast districts at Algarrobo; near Manati in meadows near the sea- 

 shore. Bermuda (Hemsley), Cuba, Jamaica, Cayman (Hitchcock), Haiti, St. Thomas, 

 St. Croix, St. John (Eggers), Antigua (Grisebach), Guadeloupe, St. Vincent, Bequia 

 (Kew Bull. No. 81, p. 247), Barbados, Grenada, Tobago. This species is common 

 from temperate North America to Argentina. Tropical and south Africa, tropical 

 Asia, and Australia. 



3. Vigna unguiculata (L.) Walp. 

 (Urban, 311.) 



Stems annual, twining, subglabrous; stipules ovate-lanceolate, subpeltate, 0.8 to 

 1.2 cm. deep; petioles 5 to 15 cm. long, glabrous; leaflets 3, the central one roundish or 

 ovate, 7.5 to 15 cm. long, acute, the base rounded; petiolule 2.5 to 5 cm. long, lateral 

 ones often unequal -sided, both sides glabrous; flowers in 6 to 12-flowered racemes on 

 glabrous peduncles 15 to 30 cm. long; bracts like the stipules; pedicels very short; 

 calyx glabrous, 4 mm. deep; teeth deltoid, acuminate, shorter than the tube, the two 

 upper ones connate; corolla yellow or reddish, 2.5 cm. deep. 



Cultivated near Yabucoa, at Guayavote, and near Mayaguez. Universally culti- 

 vated throughout the Tropics. 



Two varieties occur, one with lilac flowers and yellow seeds spotted with red, the 

 other with yellow standard, purplish white wings, and white or pale yellow seeds 

 which are brown at the hilum. 



The pods and seeds are eaten and the fibers of the long peduncles are used for ropes, 

 nets, and cloths. 



Local names, frijoles, h ntejas. 



66. PACHYRHIZUS Rich. 



Cacara Rumph.; Thou. Diet. Sc. Nat. 6: 35. 1806. 

 PachyrMzus Rich.; DC. Mem. Legum. 379. 1825. 

 Taeniocarpum Desv. Ann. Sc. Nat. 9: 420. 1826. 



Calyx campanulate, the two upper teeth subconnate, the others equal, lanceolate; 

 standard broadly obovate, appendiculate at the base with inflexed auricles; wings 

 oblong, falcate; keel incurved, obtuse, equaling the wings; stamens diadelphous or 

 monadelphous; ovary subsessile, multiovulate; style moderately thick, the apex 

 subinvolute, flattened on the inner side; stigma subglobose, oblique; pod linear, 

 subcompressed, depressed transversely between the seeds and septate within, 2- 

 valved. Herbs, twining; leaves pinnate; leaflets 3, usually more or less sinuate- 

 dentate, stipellate; flowers in elongated, sometimes panicled axillary racemes; bracts 

 and bracteoles minute, setaceous, deciduous. 



KEY To THE SPECIES. 



Root a turnip-like tuber; corolla blue; pod 15 to 22.5 cm. long. P. erosus. 



Root of long cord-like libers bearing a succession of tubers; flowers 



white; pod 20 to 30 cm. long. P. tuberosus. 



