Part 2, 1920] FABACEAE: PSORALEAE 75 



54. Parosela polygonoides (A. Gray) A. Heller, Cat. N. Am. PI. 

 ed. 2. 6. 1900. 



Dalea polygonoides A. Gray, PI. Wright. 2: 39. 1S53. 



A slender annual; stem 1-2 dm. high, erect, branched, glabrous; leaves 2-3 cm. long; 

 stipules subulate, 2 mm. long; petiole 5-10 mm. long; rachis glabrous, slightly glandular- 

 dotted; leaflets 3-9, broadly linear or linear-oblong, 6-15 mm. long, glabrous on both sides, 

 sparingly glandular-dotted beneath; peduncles terminating the branches, 3-8 cm. long; spikes 

 dense, 1-2 cm. long; bracts ovate or obovate, acuminate, equaling the calyx, persistent, dark- 

 colored, with a few large glands, ciliate; calyx-tube narrowly turbinate, somewhat extended 

 by the fruit, silky-villous, 1.5 mm. long, 10-ribbed; lobes subulate, acuminate, about equaling 

 the tube; corolla bluish, pinkish, or white; blade of the banner about 1 mm. long, rounded- 

 ovate, truncate or subcordate at base, slightly longer than the claw; wings and keel-petals 

 inserted at the middle of the staminal tube, the blades obliquely oval, with a rounded basal 

 lobe, about 1 mm. long, those of the keel-petals united along tKilower edge, the claws 1 mm. 

 long; pod villous, obliquely obovate, equaling the calyx. 



Type locality: Copper Mines [Santa Rita del Cobre], New Mexico. 

 Distribution: New Mexico, Arizona, and Chihuahua. 



55. Parosela Bigelovii Rydberg, sp. nov. 



A low annual; stem 1-3 dm. high, glabrous, branched; leaves 2-5 cm. long; stipules subu- 

 late, 1 mm. long; rachis glabrous; stipels conic, gland-like; leaflets 7-21, broadly oblong- 

 oblanceolate, often retuse, 3-6 mm. long, glabrous on both sides, minutely glandular-dotted 

 beneath; peduncles 2-8 cm. long; spikes dense, 2-4 mm. long, 8-9 mm. thick; bracts lanceolate, 

 acuminate, pilose and glandular-dotted, deciduous, equaling the calyx; calyx-tube campanu- 

 late, 2.5 mm. long, pilose, glandular-dotted between the 10 dark ribs, the lobes filiform from 

 a broad base, nearly equaling the tube; corolla white; blade of the banner 2 mm. long, oval, 

 the claw 2 mm. long; wings and keel-petals inserted near the middle of the staminal tube, the 

 blades obliquely oblong, with the basal lobes rather poorly developed, 1.5 mm. long; pod mem- 

 branous, slightly pilose above. 



Type collected near the Copper Mines [Santa Rita del Cobre], New Mexico, Bigelow, Mexican 

 Boundary Survey 226, in part (U. S. Nat. Herb. no. 125432, in part). 

 Distribution: New Mexico and Chihuahua. 



XIII. Alopecuroides. Slender annuals. Leaflets several to many, linear to elliptic. 

 Spikes dense, from subglobose to cylindric; bracts lanceolate to ovate, often dark, more or 

 less scarious-margined. Calyx-tube usually dark-ribbed, not split on the back; lobes subulate, 

 or filiform from a broad base, silky-plumose. Corolla blue to rose-purple and white, small. 

 Blade of the banner rounded-cordate to ovate. Wings and keel-petals inserted at or a little 

 below the middle of the staminal tube, the blades obliquely oval or oblong, with small basal 

 lobes and short claws. Pod pilose above, glabrous or less hairy below. 



56. Parosela pilifera Rydberg, sp. nov. 



An annual; stem about 3 dm. high, sparingly long-pilose, terete, often purple-tinged, 

 with ascending branches; leaves ascending, 2-5 cm. long; stipules subulate-setaceous, 5-7 mm. 

 long; rachis sparingly long-pilose; stipels minute, obsolete; leaflets 5-11, narrowly elliptic, 

 mucronate, 6-10 mm. long, glabrous above, sparingly pilose and minutely or obsoletely glandu- 

 lar-dotted beneath; peduncles terminal, 4—10 cm. long; spikes dense, 2-5 cm. long, 8 mm. thick; 

 bracts narrowly lanceolate, acuminate, pilose, almost black, with narrow whitish margins, 

 equaling the calyx; calyx-tube campanulate, 2 mm. long, silky-pilose, not glandular; lobes 

 filiform with a triangular base, about equaling the tube; corolla purplish-blue; blade of the 

 banner orbicular-cordate, nearly 2 mm. long, equaling the claw; blades of the wings with a 

 large rounded basal lobe, 2 mm. long, those of the keel-petals much broader, with an acute basal 

 lobe, nearly 3 mm. long, the claws of both 1-1.5 mm. long; pod pilose above, glabrous below. 



Type collected at Pachuca, Hidalgo, September 1905, Purpus 1741, in part* (herb. N. Y. Bot. 

 Gard.). 



Distribution: Hidalgo, Morelos, and Mexico. 



* This number is also partly represented by P. leporina. 



