198 NORTH AMERICAN FLORA [Volume 24 



I. MEXICANAE 



One species. I. H. mexicana. 



II. Formosae 



Leaflets obovate, acute at the base. 2. H. formosa. 



Leaflets oblong to oval, rounded or retuse at each end. 



Leaves densely ferruginous-villous, subvelutinous beneath; branches 

 subvelutinous. 

 Leaflets 11-21. 3. II. Goldmanii. 



Leaflets 5-9. 4. //. Loeseneriana. 



Leaves sparingly villous, puberulent, or glabrate beneath. 



Leaflets 11-15. elliptic or oblong, coriaceous; lateral veins indistinct. 

 Leaf -margins not revolute; branches puberulent; corolla about 



12 mm. long. 5. H. hidalgensis. 



Leaf-margins revolute; branches ferruginous-pubescent; corolla 



about 18 mm. long. 6. H. rupicola. 



Leaflets 7-11, oval or broadly elliptic. 



Leaflets thin, not reticulate. 7. H. arborescens. 



Leaflets firm, strongly reticulate. 8. H. Fringlei. 



III. Cubenses 



Leaflets reticulate-veined beneath; pod 5-6 cm. long. 9. H. macrocarpa. 



Leaflets with indistinct lateral veins; pod 2-4 cm. long. 



Branches and lower surface of the leaves subvelutinous when young; pod 



3.5-4 cm. long, 5-7-seeded. 10. H. villosa. 



Branches and lower surface of the leaves puberulent when young; pod 



2-2.5 cm. long, 1- or 2-seeded. 11. H. cubensis. 



1. Harpalyce mexicana Rose, Contr. U. S. Nat. Herb. 

 8: 42. 1903. 



A small tree; young branches densely grayish-villous, not ferruginous, in age glabrate 

 with conspicuous white lenticels; leaves 15-20 cm. long; petiole 3-4 cm. long, as well as the 

 rachis densely white- or grayish-villous; leaflets 11-15, lance-oblong, 3-6 cm. long, 2-4 

 cm. wide, rounded at the base, obtuse or acutish and mucronate at the apex, broadest near 

 the base, sparingly pubescent on both sides when young, glabrate in age, with orange glands 

 and strongly veined and reticulate beneath; flowers not known; pod woody, oblong, 5-6 cm. 

 long, 2.5 cm.. wide, glabrous, 2-3-seeded; seeds brown, 12 mm. long, 10 mm. wide, obovoid. 

 Perhaps this species does not belong to Harpalyce. 



Type locality: West of Bolaflos, Jalisco. 



Distribution: Known only from the type locality. 



2. Harpalyce formosa DC. Prodr. 2: 523. 1825. 



Astragalus carnosus Moc. & Sesse; DC. Mem. Leg. 496; Prod. 2: 523, as synonym. 1825. 

 Astragalus formosus Sesse & Moc. PI. Nov. Hisp. 119. 1889. 



A shrub, up to 1.5 m. high, subsericeous; leaves 5 cm. long or more; leaflets obovate 

 or elliptic, about 2 cm. long, rounded at the apex, acute at the base, subsericeous, slightly 

 ferruginous; racemes 5-10 cm. long; calyx 2-2.5 cm. long; corolla rose-colored; banner obovate, 

 2.5-3 cm. long, longer than the other petals; wings oblanceolate, falcate; keel-petals linear, 

 strongly incurved; pod glabrous, about 5 cm. long and 2.5 cm. wide. 



Type locality: Warmer regions of Mexico. 



Distribution: Known only from the type locality and Yucatan. 



Illustrations: Moc. & Sesse, Calq. Dess. pi. 249; Jour. Bot. Hook. 3: pi. 5. 



3. Harpalyce Goldmanii Rose, Contr. U. S. Nat. 



Herb. 8:313. 1905. 



? Harpalyce macrobolrya Harms; Loesener, Abh. Bot. Ver. Prov. Brand. 51: 22. 1909. 



A shrub; branches when young densely ferruginous-villous, almost velutinous, in age 

 light-gray with white lenticels; stipules linear-filiform, caducous; leaves about 1 dm. long; 

 petiole 1-5.3 cm. long, as well as the rachis densely ferruginous; leaflets 11-19, oblong, rounded 

 or obtuse at each end, 2-3 cm. long, about 1 cm. wide, dark and puberulent but soon glabrate 

 above, densely ferruginous beneath, with strong midrib beneath but the veins faint; panicle 

 1-1.5 dm. long, densely flowered, densely fenuginous-villous; calyx-lips somewhat unequal, 



