92 NORTH AMERICAN FLORA [Volume 24 



4 mm. long, 3 mm. wide; blades of the other petals nearly alike, obliquely oblong, 4 mm. 

 long, with a basal lobe on each side, that on the upper side somewhat larger; pod slightly pubes- 

 cent. 



Type collected at the city of Durango and vicinity, 1896, Palmer SOS (Gray Herbarium). 



XXV. Pectinatae. Perennials, woody at the base. Leaflets numerous, linear, involute. 

 Spikes at the ends of the branches, short, dense ; bracts lanceolate or ovate, caducous, more or 

 less pubescent. Calyx-tube campanulate, densely villous; lobes lanceolate or subulate, about 

 equaling the tube. Corolla purple. Wings and keel-petals inserted far below the middle of 

 the staminal tube. Pod villous. 



106. Parosela pectinata (Kunth) Rose, Contr. U. S. Nat. 

 Herb. 10: 104. 1906. 



Dalea pectinata Kunth, Mimoses 169. 1819. 



A herbaceous perennial, with a woody thick base; stems several, 5-10 dm. high, branched 

 above, glabrous, striate; leaves spreading, 3-5 cm. long; stipules subulate-setaceous, about 



2 mm. long; petiole 1-3 mm. long; rachis slightly- winged, glabrous, glandular-dotted on the 

 wings; stipels gland-like; leaflets 41-65, linear, involute, 2-4 mm. long, glabrous, glandular- 

 dotted; peduncles axillary or terminating axillary branches, 2-8 cm. long, glabrous except in 

 and just below the spike; spikes dense, 2-3 cm. long, about 1 cm. thick; bracts lanceolate, 

 acuminate, caducous, silky-villous; calyx-tube turbinate, 2 mm. long, rather prominently 10- 

 ribbed, silky-villous; lobes lanceolate, acuminate, nearly equaling the tube; corolla blue or 

 bluish-purple; blade of the banner cordate, 3 mm. long, about equaling the claw; blades of 

 the wings 4.5 mm. long, those of the keel-petals with a less distinct basal lobe, the claws about 



3 mm. long; pod broadly obliquely obovate, with a minute beak, short- villous. 



Type locality: Villapando, Mexico. 



Distribution: Durango to Jalisco and San Luis Potosi. 



Illustration: Kunth, Mimoses pi. 49. 



107. Parosela abietifolia Rose, sp. nov. 



An undershrub; stems simple below, branched above, villous-tomentose, very leafy, 

 3-4 dm. high; leaves 2-3 cm. long; stipules filiform, 2 mm. long; rachis villous-canescent; 

 stipels obsolete; leaflets 31-35, linear-filiform, involute, 5-8 mm. long, less than 1 mm. wide, 

 densely grayish short- villous; spikes short-peduncled in corymbiform cymose leafy panicles, 

 1-3 cm. long; bracts ovate, acuminate, densely silky-villous, obscurely glandular-dotted, about 

 equaling the calyx; calyx-tube broadly campanulate, somewhat more deeply cleft on the back, 

 2 mm. long, densely silky-villous, obscurely glandular-dotted; lobes subulate, about equaling 

 the tube, densely silky; corolla rose-purple; blade of the banner cordate, 2 mm. long, about 

 equaling the claw; blades of the wings 3.5 mm. long, those of the keel-petals 4 mm. long, the 

 claws 1.5 and 2 mm. long respectively; pod densely villous with a few rather large glands. 



Type collected on dry chalkv summits of mountains above Etzatlan, Jalisco, October 27, 1903, 

 Pringle S774 (U. S. Nat. Herb. 460S16). 



XXVI. Arenariae. Decumbent or spreading perennial herbs. Leaflets several, mostly 

 obovate or cuneate. Spikes elongate, lax and slender, on peduncles arising opposite the 

 leaves; bracts obovate, acuminate, persistent, with a few conspicuous glands. Calyx-tube 

 turbinate, not conspicuously ribbed. Corolla purple, red or rarely white, each petal with a 

 gland at the apex. Blade of the banner rounded-cordate, more or less cucullate. Wings and 

 keel-petals inserted at or below the middle of the staminal tube, the blades very broad, with 

 rather obsolete basal lobes, short-clawed. Pods half-reniform. 



