Part 2, 1920] FABACEAE : PSORALEAE 109 



155. Parosela fuscescens Rydberg, sp. nov. 



A shrub, probably 1 m. high or more; branches glabrous, leafy; leaves 1-2 cm. long; 

 stipules subulate, persistent, 1-2 mm. long; rachis glabrous; stipels conic, gland-like; leaflets 

 5-11, oblong-obovate, often retuse, 4-6 mm. long, glabrous on both sides, glandular-dotted 

 beneath; spikes terminal, dense, 1.5-2.5 cm. long, 1 cm. thick, short-peduncled ; bracts lanceo- 

 late, pilose and glandular, acute; calyx-tube campanulate, 3 mm. long, 10-ribbed, pilose, con- 

 spicuously glandular-dotted in the intervals; lobes filiform from a broad base, 4 mm. long, 

 plumose; corolla yellow, the petals usually with a large gland near the tip; blade of the banner 

 broadly rhombic-ovate, 4 mm. long, the claw 3 mm. long; blades of the wings 5 mm. long, 

 those of the keel-petals broader, 6 mm. long, with a smaller reflexed basal lobe; pod densely 

 and finely pilose above, glabrous below. 



Type collected in Coahuila, in 1880, Edward Palmer 209 (U. S. Nat. Herb. no. 24309). 



156. Parosela zimapanica (S. Schauer) Rydberg. 



Dalea microphylla Schlecht. Linnaea 12: 296. 1838. Not D. microphylla H.B.K. 1823.* 



Dalea zimapanica S. Schauer, Linnaea 20: 746. 1857. 



Parosela microphylla Rose, Contr. U. S. Herb. 10: 106, in part. 1906. 



Dalea adenophylla Moric. MS., in herb. 



A shrub, 1-3 m. high, often much branched; branches glabrous, terete; leaves 2-5 cm. long, 

 spreading; stipules subulate, 2 mm. long; petiole 2-5 mm. long; rachis rather thick, glabrous, 

 slightly glandular-dotted; stipels gland-like; leaflets 11-19, somewhat fleshy, 2-6 mm. long, 

 elliptic or oblong, rounded to acutish at the apex, glabrous on both sides, glandular-dotted 

 beneath; peduncles terminal, 1-3 cm. long; spikes short, subglobose or oblong, 1.5-3 cm. long, 

 12-15 mm. thick; bracts lanceolate or ovate-lanceolate, acute or somewhat acuminate, glabrous 

 and conspicuously glandular-dotted on the back, ciliate at the base and on and near the mar- 

 gins, about equaling the calyx; calyx-tube turbinate, 2.5 mm. long, silky- villous, with yellow 

 glands between the 10 ribs; lobes subulate-filiform from a broad base, slightly longer than the 

 tube; corolla yellow, fading purplish-brown or brownish-rose-colored; blade of the banner 

 3 mm. long, rounded-cordate; wings and keel-petals each with a gland near the apex, the blades 

 of the wings obliquely elliptic, with a large basal lobe, 5 mm. long, those of the keel-petals 

 obliquely obovate, 6 mm. long, the claws of both 3 mm. long; pod villous. 



Type locality: In the neighborhood of Zimapan [Hidalgo]. 



Distribution: Southern Mexico. 



157. Parosela diversicolor Rydberg, sp. nov. 



A shrub, 1 m. high or more; branches glabrous, very sparingly glandular-dotted; leaves 

 ascending, 3-7 cm. long, ascending; stipules subulate; rachis glabrous, glandless except 

 the gland-like stipels; leaflets 13-35, oblong, glabrous, 7-9 mm. long, glandular-dotted beneath; 

 peduncles terminal, 2-5 cm. long; spikes dense, short, 1-2 cm. long; bracts lanceolate, acumi- 

 nate, conspicuously glandular-dotted, glabrous except the ciliate margins; calyx-tube turbinate, 

 3 mm. long, silky- villous, 10-ribbed, with yellow glands between the ribs; lobes filiform from 

 a triangular base, plumose, 5 mm. long; corolla yellow, turning rose and purple; blade of the 

 banner round-cordate, 4 mm. long, the claw 4 mm. long; blades of the wings 6-7 mm. long, 

 those of the keel-petals 7-8 mm. long, the claws of both 4 mm. long; pod silky villous. 



Type collected in Sierra de Clevellinas, State of Oaxaca, October 1894, Charles L. Smith 549 

 (U. S. Nat. Herb. no. 312833). 



XXXVIII. Leucostomae. Glabrous or pubescent shrubs. Leaflets of several pairs. 

 Spikes rather dense, usually elongate and often acute; bracts glabrous or sparingly pubescent, 

 usually dark, almost black, and conspicuously glandular-dotted. Calyx-tube glabrous or 

 sparingly pubescent below the strongly pubescent throat, strongly ribbed and conspicuously 

 glandular between the ribs. Corolla yellow, turning purplish, brown, or blackish in drying, 

 in two species purple apparently from the beginning; some of the petals often with a gland near 

 the apex, and the banner with a semicircle of glands near the base. Wings and keel-petals 

 inserted far below the middle of the staminal tube, the latter the larger. Pod densely pubes- 

 cent and conspicuously glandular above, less so or glabrous at the base. 



* The Mexican plant is apparently different from the South American and true P. microphylla, 

 the description of which does not agree with our plant. Good South American material wanting. 



