214 NORTH AMERICAN FLORA [Volume 24 



13. Diphysa macrocarpa Standley, Contr. U. S. Nat. Herb. 

 23: 479. 1922. 



Diphysa senuioides Benth.;Jienih. & Oerst. Vidensk. Meddc-1. 1853: 12, in part, as to the fruit. 1853. 

 A shrub or small tree; young branches densely glandular- viscid and pilose; leaves 1-1.5 

 dm. long; stipules subulate, 7-8 mm. long; rachis densely glandular-viscid; leaflets 25-33, 

 oblong or elliptic, 10-15 mm. long, rounded at each end, mucronate, minutely hispidulous- 

 denticulate on the margins, otherwise glabrous; peduncles and pedicels densely glandular- 

 viscid; bracts deciduous; bractlets oblong, 3 mm. long, hispidulous-ciliolate; calyx glabrous, 

 except the ciliolate margins of the lobes; tube (including the hypanthium) 5 mm. long; upper 

 two lobes ovate, obtuse, 2.5 mm. long, the lateral ones ovate, acute, the lowest one lanceolate, 

 acute, 3 mm. long; pod 5-10 cm. long, 1.5 cm. broad, 3-4-seeded, more or less glandular- 

 hispid, the hairs with postulate bases, the stipe twice as long as the calyx. 



Type locality: Tecozantla, Hidalgo. 

 Distribution: Hidalgo. 



14. Diphysa racemosa Rose, Contr. U. S. Nat. Herb. 

 1: 97. 1891. 



A shrub, 2-3 m. high; young branches densely glandular-viscid; leaves about 4 cm. long; 

 leaflets 9-17, oblong, 3-5 mm long, viscid-pubescent, obtuse; racemes 1-2 dm. long, many- 

 flowered ; peduncle and pedicels densely glandular- viscid ; bracts oblong to obovate, glandular, 

 4—5 mm. long; bractlets ovate to obovate, densely glandular, 5 mm. long; calyx densely glan- 

 dular; hypanthium and calyx-tube together 8 mm. long; upper two calyx-lobes ovate, acutish, 

 4 mm. long, the lateral ones lanceolate, acute, the lowest one lanceolate, acuminate, 5 mm. 

 long; corolla 12 mm. long; pod 3-4 cm. long, 15-18 mm. thick, glandular-pubescent and 

 black-dotted; stipe 10-12 mm. long; seeds almost white, 7 mm. long, 3 mm. wide. 



Type locality: Hill-slopes near Alamos, Sonora. 

 Distribution: Sonora, Sihaloa, and Durango. 

 Illustration: Contr. U. S. Nat. Herb. 1: pi. J. 



15. Diphysa puberulenta Rydberg, sp. nov. 



A low shrub; branches densely glandular as well as grayish-puberulent when young, in 

 age brown or gray; stipules caducous, lanceolate; leaves 2-5 cm. long; rachis puberulent and 

 somewhat glandular; leaflets 7-11, oblong to broadly oval, from rounded to acutish at each 

 end, finely puberulent, 4-10 mm. long; racemes numerous, 4-10 cm. long; peduncle and 

 pedicels densely glandular as well as puberulent; bracts oblong or lanceolate, 3-4 mm. long; 

 bractlets oblanceolate, obtuse; calyx densely puberulent and glandular; tube and hypanthium 

 together 6 mm. long; calyx -lobes 2-3 mm. long, the uppermost two lobes ovate, obtuse, the 

 lateral ones lanceolate, acute, the lowest one lanceolate-subulate, acuminate; corolla yellowish, 

 about 1 cm. long; pod 3-5 cm. long, black-dotted and glandular; stipe about 1 cm. long. 



Type collected at Acaponeta, Tepic, February, 1S95, F. H. Lamb 520 (herb. N. Y. Bot. Gard., 

 flower) ; same locality, April,- 1910, Rose. Standley &• Russell 14417 (fruit). 

 Distribution: Sinaloa to Guerrero. 



16. Diphysa villosa Rydberg, sp. nov. 



A low shrub; young branches densely glandular-viscid and somewhat short-villous, in 

 age with straw-colored bark; stipules subulate, 2-3 mm. long, caducous; leaves 7-12 cm. long; 

 rachis glandular and short-villous; leaflets 17-29, elliptic or oval, 9-12 mm. long, rounded at 

 each end, finely villous on both sides; racemes 4-8 cm. long; peduncles and pedicels densely 

 glandular; bractlets oblanceolate, 7 mm. long, glandular and villous; hypanthium 5 mm. 

 long, villous; calyx villous and with scattered glands, the tube 3 mm. long, the lobes 6-7 mm. 

 long, the upper two lobes broadly oblong, obtuse, the lateral ones narrower, similar, the lowest 



