462 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



On sandhills, Chihuahua and Coahuila, New Mexico ; type from the Jornada 

 del Muerto. 



Shrub, 0.5 to 1 meter high, with erect canescent branches ; leaves 1 cm. long 

 or less, linear or oblanceolate, canescent; spikes 1.2 to 1.5 cm. thick; calyx 

 white-villous ; petals dark blue ; fruit pubescent. 



85. Parosela juncea (Rydb. ) Standi. 



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



Known only from the type locality, Esperanza Canyon, San Pedro MS,rtir 

 Mountains, Baja California. 



Shrub with glabrous branches ; leaflets 1 to 5, oblong or narrowly oblanceo- 

 late, 1 to 1.5 cm. long, glabrous ; spikes subglobose, 1 cm. thick ; petals dark 

 blue, 



86. Parosela tinctoria (T. S. Brandeg.) Standi. 



Dalea tinctoria T. S. Brandeg. Proc. Calif. Acad. II. 2: 147. 1889. 

 Psorothamnus tinctorius Rydb. N. Amer. Fl. 24: 47. 1919. 

 Baja California ; type from San Gregorio. 



Shrub, 1 to 2 meters high, with gray branches; leaflets 3 or 5, 4 to 10 mm. 

 long ; spikes subglobose, 1 cm. thick ; calyx villous ; petals dark blue. 



87. Parosela dentata (Rydb.) Standi. 

 Psorothamnus dent at us Rydb. N. Amer. Fl. 24: 47. 1919. 



Known only from the type locality, Santo Domingo, Baja California. 

 Shrub with velutinous-canescent branches ; leaflets 9 to 17, 1 to 2 cm. long, 

 canescent ; spikes subglobose, 1 cm. thick ; petals dark blue. 



88. Parosela arenaria (T. S. Brandeg.) Standi. 



Dalea tinctoria arenaria T. S. Brandeg. Proc. Calif. Acad. II. 2: 147. 1889. 



Psorothamnus arenarius Rydb. N. Amer. Fl. 24: 47. 1919. 



Southern Baja California ; type from Boca de Soledad. 



Shrub, the branches glabrous or nearly so ; leaflets 5 to 9, 1 to 3.5 cm. long, 

 sparsely canescent; spikes short, 1 cm. thick; calyx silky-villous ; petals blue; 

 fruit pubescent. 



89. Parosela pectinata (Kunth) Rose, Contr. U. S. Nat. Herb. 10: 104. 1906. 

 Dalea pectinata Kunth, Mimos, PI. Leguni. 169. pi. 49. 1819. 

 Durango, Jalisco, and San Luis Potosf ; type from Villapando. 



Stems sulfruticose, 0.5 to 1 meter high, glabrous ; leaflets 41 to 65, linear, 2 to 

 4 mm. long, glabrous ; spikes dense, 2 to 3 cm. long, 1 cm. thick ; calyx silky- 

 villous; petals blue or bluish purple; fruit short-villous. 



90. Parosela abietifolia Rose; Rydb. N. Amer. Fl. 24: 92. 1920. 

 Known only from tbe type locality, mountains above Etzatian, Jalisco. 

 Stems suffrutieose, 30 to 40 cm. high, villous-tomentose ; leaflets 31 to 35, 5 



to 8 mm. long, short-villous ; spikes 1 to 3 cm. long ; calyx densely silky-villous ; 

 petals rose-purple; fruit densely villous. 



91. Parosela tomentosa (Cav.) Rose, Contr. U. S. Nat. Herb. 12:273. 1909. 

 Psoralca tomentosa Cav. Icon. PI. 3:21. pi. 2JfO. 1794. 



Dalea tomentosa Willd. Sp. PI. 3: 1341. 1803. 



Dalea verhcnacea Schlecht. & Cham. Linnaea 5:579. 1830. 



Dalea argentea Don, Hist. Dichl. PI. 2: 225. 1832. 



Tepic and .Jalisco to Veracruz and Guerrero. 



Shrub, 1 meter high, with villous branches ; leaflets 3 to 7, obovate, 8 to 12 

 mm. long, acute or mucronate, silky-villous ; spikes dense, 1 to 3 cm. long, acute ; 

 calyx villous; petals purple or pink; fruit pubescent above, 



92. Parosela psoraleoides (Moric.) Rose, Contr. U. S. Nat. Herb. 10: 104. 1906. 

 Dalea vcrbenacea sericea Schlecht. Liunaea 5 : 579. 1830, 



