Part 1, 1919] FABACEAE: PSORALEAE 63 



petioles 3-5 mm. long; rachis strigose-canescent; stipels apparently wanting; leaflets 9-17, 

 oblong-obovate, 2-4 mm. long, often folded, glabrous above, strigose beneath; peduncles 1-1.5 

 em. long, strigose; racemes dense, 1-2 cm. long; bracts lanceolate, hirsute; calyx hirsute- 

 pilose; tube turbinate, 1.5 mm. long, strongly 10-ribbed; lobes lanceolate, acuminate, longer than 

 the tube; banner purple; wings and keel-petals whitish with purple margin; blade of the banner 

 suborbicular-reniform, 1 mm. long, 1.5 mm. broad, the claw 2 mm. long; wings and keel-petals 

 inserted near the middle of the staminal tube, the blades with a small basal lobe, those of the 

 former 3 mm. long, those of the latter 4 mm. long, the claws 1.5 mm. long. 



Type locality: Topo and in Canon Camillas, Lower California. 

 Distribution: Extreme southern California and northern Lower California. 



38. Parosela alamosana Rose, sp. nov. 

 A perennial herb, branched at the base; stems several, decumbent or prostrate, 1-3 dm. 

 long, slender, strigose; leaves 2-3 cm. long, spreading; stipules minute, subulate; petioles 2-3 

 mm. long; raehis strigose-canescent; stipels obsolete; leaflets 15-21, oblong, 2 mm. long, striate 

 and glabrous above, strigose beneath, rounded at the apex; peduncles 1-2 cm. long, terminal or 

 opposite the leaves; bracts lanceolate, strigose, caducous; calyx-tube turbinate, 1.5 mm. long, 

 strongly 10-ribbed, canescent; lobes lanceolate, acute, the upper four 2 mm. long, the lowest 3 

 mm. long; corolla apparently white; blade of the banner subreniform, 1.5 mm. long, 2.5 mm. 

 broad, the claw 2 mm. long; wings and keel-petals inserted far below the middle of the staminal 

 tube; blades of the wings 3 mm. long, those of the keel-petals 4 mm. long, the claws 1.5 mm. long. 



Type collected at Alamos, Sonora, September 1S90, Edward Palmer 711 (U. S. Nat. Herb. no. 

 24314). 



Distribution: Type locality and vicinity. 



IX. Lachnostachydes. Perennials, often more or less woody at the base. Leaflets many, 

 with rather prominent glands. Racemes dense, often curved in fruit; bracts silky-pubescent. 

 Flowers short-pedicelled or subsessile, reflexed in fruit, subtended by 1-3 prominent acute 

 glands. Calyx silky, with minute glands; lobes filiform from a triangular base, plumose. 

 Blade of the banner cordate, shorter than the wings, often with a few glands towards the base. 

 Wings and keel-petals inserted near the base of the staminal tube; keel-petals somewhat larger 

 than the wings. 



39. Parosela lachnostachys (A. Gray) A. Heller, Cat. N. Am. PI. 

 ed. 2. 6. 1900. 



Dalea lachnostachys A. Gray, PI. Wright. 1: 46. 1852. 



A herbaceous perennial, with a deep root; stem erect, branched, 1-3 dm. high, straw-colored, 

 conspicuously glandular-pustulate and finely villous; leaves spreading, 4-8 cm. long; stipules 

 subulate, 3-5 mm. long; petioles 1-3 cm. long; rachis glandular-pustulate and villous; stipels 

 gland-like; leaflets 9-11, oval or obovate, silky- villous on both sides, conspicuously glandular- 

 dotted along the margins beneath, 8-15 mm. long; peduncles opposite the leaves and terminal, 

 3-6 cm. long; racemes dense, cylindric, 4-8 cm. long, fully 1.5 cm. thick; bracts ovate, concave, 

 scarious-margined, often tinged with lilac, pubescent, long-acuminate, longer than the buds, 

 deciduous; calyx-tube turbinate, 3 mm. long, silky-pilose, strongly 10-ribbed; lobes twice as 

 long as the tube; corolla purple; blade of the banner broadly oval, cordate at the base, 4 mm. 

 long, the claw 3 mm. long; blades of the wings and keel-petals obliquely oval, with a rounded 

 basal lobe, about 4 mm. long, the claws 3 mm. long; pod very villous. 



Type locality: Hills about 80 miles west of Pecos, Texas. 

 Distribution: Western Texas to southern Arizona and Chihuahua. 



40. Parosela sericocalyx Rydberg, sp. nov. 



Dalea lachnostachys Seem. Bot. Voy. Herald 279, in part; hyponym. 1857. 



A shrubby perennial; stem erect, 5 dm. high or more, straw-colored, not conspicuously 

 glandular-dotted, silky-villous when young; leaves spreading, 3-7 cm. long; stipules setaceous; 

 rachis silky-villous; leaflets 9-21, oval, silky on both sides, acutish at each end, 10-15 mm. long; 



