STANDLEY TREES AND SHRUBS OF MEXICO. 457 



46. Parosela atrocyanea Rydb. N. Amer. Fl. 24: 111. 1920. 

 Known only from the type locality, San Luis Tultitlanapa, Puebla. 



Low shrub with strigose branches; leaflets 9 to 17, oblong or obovate, 4 to 7 

 mm. long, glabrous above, strigose beneath ; spikes dense, 1.5 to 3.5 cm. long, 

 1 cm. thick ; calyx tube nearly glabrous, the lobes ciliate ; petals at first yel- 

 low (?), turning dark blue, the banner wholly or partly yellow; fruit pubescent 

 above, glabrous below. 



47. Parosela gigantea Rose ; Rydb. N. Amer. Fl. 24: 110. 1920. 

 Michoacan and Puebla ; type from Tarascon, Michoacan. 



Shrub, 2 to 5 meters high, the branches villous ; leaflets 11 to 17, oval or 

 obovate, 6 to 10 mm. long, pilose ; spikes 3 to 6 cm. long, 1 cm. thick, dense, 

 acute; calyx tube glabrous, the lobes long-pilose; petals yellow, turning black- 

 ish; fruit sparsely pilose. 



48. Parosela macrostachya (Moric.) Rose, Contr. U. S. Nat. Herb. 12: 273. 

 1909. 



Dalea macrostachya Moric. Mem. Soc. Geneve 6: 543. pi. 5. 1833. 



Dalea leucostoma Schlecht. Linnaea 12: 294. 1838. 



Hidalgo. 



Shrub, 0.3 to 1 meter high, the branches at first pubescent, becoming glabrate ; 

 leaflets 17 to 25, oblong or elliptic, 5 to 7 mm. long, glabrous above, pilose be- 

 neath ; spikes 2 to 4 cm. long ; petals yellow ; fruit sericeous. 



49. Parosela crassifolia (Hemsl.) Rose, Contr. U. S. Nat. Herb. 12: 272. 1909. 

 Dalea crassifolia Hemsl. Biol. Centr. Amer. Bot. 1: 238. 1880. 



Sinaloa and Jalisco ; type from the Sierra Madre of Sinaloa or Durango. 



Shrub, 50 cm. high or more, with long glabrous branches ; leaflets oblong, 3 

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

 pilose, the lobes plumose; petals pale pink or nearly white; fruit densely pilose 

 above. 



50. Parosela roseiflora Rydb. N. Amer. Fl. 24: 10-5. 1920. 

 Type from the Sierra Madre of Durango or Sinaloa. 



Plants glabrous, 40 cm. high or more ; leaflets 25 to 41, elliptic. 5 mm. long, 

 obtuse ; spikes dense, 2 cm. long ; calyx tube sericeous, the lobes plumose ; petals 

 rose ; fruit silky-villous. 



51. Parosela long-ifolia Rose; Rydb. N. Amer. Fl. 24: 105. 1920. 



Known only from the type locality, between Altenguilla and Jacala, Jalisco. 



Stems glabrous, 1 meter high or more; leaflets 31 to 37, oval, 3 to 4 mm. long, 

 glabrous; spikes dense, 2 to 3 cm. long, 1 cm. thick; calyx tube silky-pilose; ban- 

 ner yellowish, the other petals light ro.se; fruit sericeous. 



52. Parosela saflfordii Rose, Contr. U. S. Nat. Herb. 12: 273. 1909. 

 Coahuila (type locality) and Durango. 



Low shrub with glabrous branches ; leaflets 9 to 13, oblanceolate or obovate, 

 2 to 3 mm. long, glabrous ; calyx tube pilose ; petals rose-colored ; pod pubescent. 



53. Parosela formosa (Torr.) Vail, Trans. N. Y. Acad. Sci. 14: 34. 1894. 

 Dalea formosa Torr. Ann. Lye. N. Y. 2: 177. 1827. 



Chihuahua and Sonora. Colorado to Texas and Arizona ; type from the 

 Platte River, Colorado. 



Crooked shrub, 0.3 to 1 meter high, with glabrous branches ; leaflets 7 or 9, 

 oblong-spatulate, 1.5 to 2 mm. long, glabrous; calyx tube pilose, the lobes 

 plumose; petals purple-rose; fruit pilose. 



A very handsome shrub when in flower. 



