STANDLEY TEEES AND SHRUBS OF MEXICO. 461 



Sonora ; type from Los Pinitos. Arizona. 



Stems suffruticose, puberulent ; leatlets 17 to 27, linear, 4 to 6 mm. long, 

 obtuse, glabrous or spai'sely sericeous when young ; spikes dense, 1 cm. long or 

 less ; calyx sparsely sericeous ; petals white ; fruit densely pubescent above. 



78. Parosela eysenhardtioides (Hemsl.) Rose, Contr. U. S. Nat. Herb. 10: 104. 

 1906. 



Dalca eysenhardtioides Hemsl. Diag. PI. Mex. 6. 1878. 



Michoacan to Oaxaca ; type from Oaxaca. 



Shrub, 2 to 4 meters high, with finely puberulent branches; leaflets 7 to 13, 

 oblong-obovate or oblong-oblanceolate, 1 to 2 em. long, mucronate ; spikes dense, 

 1 to 3 cm. long, 6 to 7 mm. thick ; petals white ; fruit puberulent. 



79. Parosela leucostachys (A. Gray) Rose, Contr. U. S. Nat. Herb. 10: 104. 

 1906. 



Dalea leucostachys A. Gray, Mem. Amer. Acad. II. 4: 32. 1849. 



Chihuahua, Durango, and Jalisco; type from Cosihuiriachic, Chihuahua. 



Shrub, 0.5 to 1 meter high, with puberulent or short-villous branches; leaflets 

 5 to 9, oblanceolate or obovate, obtuse or retuse ; spikes 1 to 3 cm. long ; calyx 

 puberulent ; petals white ; fruit pubescent. 



80. Parosela frutescens (A. Gray) Vail; Rose, Contr. U. S. Nat. Herb. 8: 303. 

 1905. 



Dalea frutescens A. Gray, Bost. Journ. Nat. Hist. 6: 175. 1850, 



Chihuahua, Coahuila, and Nuevo Leon. Texas (type from Guadalupe River) 



and New Mexico. 



Slender shrub, 1 meter high or less, with glabrous branches; leaflets 13 to 



17, obovate, 3 to 8 mm. long, retuse, glabrous ; spikes dense, about 1 cm. long ; 



calyx tube glabroiis ; petals purple; fruit glabrous. 



81. Parosela hospes Rose, Contr. U. S. Nat. Herb. 12: 272. 1909. 



Coahuila and Nuevo Leon; type collected near Monterrey, Nuevo Leon. 



Slender shrub, 2 to 3 meters high, glabrous throughout, the branches pur- 

 plish ; leaflets 5 or 7, oblong or cuneate, 6 to 10 mm. long ; spikes lax, 2 to 4 

 cm. long, 5 to 12-flowered ; petals creamy white to pale purple ; fruit sericeous. 



82. Parosela pilosissima Rydb. N. Amer. Fl, 24: 91. 1920. 

 Known only from the type locality, near the city of Durango. 



Shrub, 20 to 40 cm. high, the branches purplish, puberulent when young; 

 leaflets 9 to 15, elliptic or oval, 2 to 4 mm. long, glabrous above, pilose be- 

 neath ; spikes dense, 1 to 3 cm. long ; calyx pubescent ; petals blue ; fruit 

 slightly pubescent. 



83. Parosela emoryi (A. Gray) Heller, Cat. N. Amer. PI. ed. 2. 6. 1900. 

 Dalea emoryi A. Gray, Mem. Amer. Acad. II. 5: 315. 1854. 

 Psorothamnus emoryi Rydb. N. Ajner. Fl. 24: 47. 1919, 



Sonora and Baja California. Arizona (type from the Gila River) and south- 

 ern California. 



Shrub. 1 to 2 meters high, with white-velvety branches dotted with red or 

 orange glands ; leaflets 1 to 13, linear-oblong to obovate, 5 to 20 nnn. long, 

 white-velutinous ; spikes dense, 1.2 to 1.5 cm. thick, 10 to 20-flowered : petals 

 dark blue ; fruit villous above. 



This and related species were used by the Indians to dye baskets, giving 

 a yellow or yellowish brown color. 



84. Parosela scoparia (A. Gray) Heller, Cat. N. Amer. PI. ed. 2. 7. 1900. 

 Dalea scoparia A. Gray, Mem. Amer. Acad. II. 4: 32. 1849. 

 Psorothamnus scoparius Rydb. N. Amer. Fl. 24: 48. 1919. 



