110 NORTH AMERICAN FLORA [Volume 24 



158. Parosela argyrostachya (H. & A.) Rydberg. 



Dalea argyrostachya H. & A. Bot. Beech. Voy. 285. 1836. 



A shrub, 5 dm. high or more; branches glabrous, sparingly glandular-dotted; leaves 3-5 cm. 

 long; stipules subulate, 2 mm. long; rachis glabrous; stipels conic, minute; leaflets 15-21, ob- 

 long or oblong-obovate, rounded or retuse at the apex, glabrous on both sides, glandular-dotted 

 beneath; peduncles terminal, 1-5 cm long; spikes dense, acute, 3-6 cm. long; bracts black, 

 glabrous, ovate, rather abruptly long-acuminate, exceeding the calyx; calyx- tube broadly 

 campanulate, 2.5 mm. long, glabrous, 10-ribbed, with a row of conspicuous, often confluent 

 glands in each interval; lobes filiform from a broad base, plumose, 3-3.5 mm. long; corolla 

 yellow, turning brownish; blade of the banner rounded-ovate or cordate, 3.5-4 mm. long, the 

 claw 2.5 mm. long; blades of the wings 5 mm. long, those of the keel-petals 6 mm. long and with 

 a smaller basal lobe, the claws of both 2-3 mm. long; pod densely pubescent above, glabrous 

 below. 



Type locality: Jalisco. 



Distribution: Chihuahua, Zacatecas, Chiapas, and Guerrero. 



159. Parosela Botterii Rydberg, sp. nov. 



A shrubby perennial ; branches with scattered glands, glabrous or the younger part some- 

 what brownish-villous; leaves about 2 cm. long; stipules subulate, 2 mm. long; rachis glabrous; 

 stipels conic, gland-like; leaflets 17-21, elliptic, 2-4 mm. long, glabrous, glandular-dotted be- 

 neath; peduncles at the ends of the branches, 2-3 cm. long; spikes dense, 3-5 cm. long, pyrami- 

 dal, acute; bracts ovate-cordate, acuminate, glabrous, with a few glands, about equaling the 

 calyx; calyx-tube campanulate, sparingly hirsute, more densely so at the mouth, glandular in 

 the intervals, 3 mm. long; lobes linear-subulate from a deltoid base, 2.5 mm. long, plumose; 

 corolla dark rose-purple; blade of the banner cordate, 4 mm. long, with an elongate gland at 

 the apex and a semicircle of small glands near the base; blades of the wings and keel-petals with 

 an acute basal lobe, the latter in the wings somewhat salient, in the keel-petals reflexed; blades 

 of the wings 5 mm., those of the keel-petals 7 mm. long, the claws of both 3-4 mm. long. 

 (Though the petals are rose-purple, the structure of the calyx and the more or less gland- 

 bearing petals associate this with the yellow-flowered species of the Leucostomae.) 



Type collected ar Orizaba, Mexico, Bolter i 973 (Gray Herbarium). 



160. Parosela gigantea Rose, sp. nov. 



A shrub, 2-5 m. high; branches long-villous and glandular-dotted, in age gray and striate; 

 leaves 3-5 cm. long; stipules subulate-setaceous, 3-5 mm. long; leaflets 11-17, oval or obovate, 

 6-10 mm. long, long-pilose on both sides, dotted with black glands beneath; stipels gland- 

 like; peduncles terminal, 2-4 cm. long; spikes 3-6 cm. long, dense, acute, fully 1 cm. thick; 

 bracts broadly ovate, almost black, glabrous, and conspicuously glandular-dotted, abruptly 

 acuminate into a subulate tip, longer than the calyx, deciduous; calyx-tube broadly turbinate, 

 3 mm. long, glabrous, 10-ribbed, with 3-4 black glands in each interval; lobes long-pilose, 

 subulate-filiform from a triangular base, 2 mm. long; corolla yellow, turning blackish; blade 

 of the banner suborbicular, 3 mm. long, equaling the claw; blades of the wings 4 mm. long, 

 those of the keel-petals 6 mm. long; pod sparingly pilose and with a few glands. 



Tvpe collected at Tarascon, Michoacan, October 11, 1904, Pringle 884S (U. S. Nat. Herb. no. 

 461346). 



Distribution: Michoacan to Puebla. 



161. Parosela macrostachya (Moric.) Rose, Contr. U. S. Nat. 

 Herb. 12: 273. 1909. 



Dalea macrostachya Moric. Mem. Soc. Geneve 6: 534. 1833. 



Dalea leucostoma Schlecht. Linnaea 12: 294. 1838. 



Parosela leucostoma Rose, Contr. U. S. Nat. Herb. 10: 106. 1906. 



A shrub, 3-10 dm. high; branches short-pubescent when young, in age glabrate and pale- 

 gray, sparingly glandular-dotted; leaves 2-3 cm. long; stipules subulate; rachis sparingly short- 

 pubescent and slightly glandular-dotted; stipels gland-like, conic; leaflets 17-25, oblong or 



