STANDLEY TREES AND SHRUBS OF MEXICO 1483 



42. Coleosanthus argutus (Robinson) Blake. 



Brickellia arguta Robinson, Mem. Gray Herb. 1: 102./. 79. 1917. 



Northern Baja California. Southern California; type locality not definitely 

 stated. 



Fruticose, glandular-pubescent; leaf blades ovate, about 1.5 cm. long, cori- 

 aceous, reticulate, sharply toothed; heads 13 mm. high, about 15 mm. wide, 

 about 50-fiowered, solitary at tips of branches; outer phyllaries coriaceous- 

 herbaceous, lance-ovate. 



43. Coleosanthus brandegei (Robinson) Blake. 



Brickellia brandegei Robinson, Mem. Gray Herb. 1: 106./. 82. 1917. 



Baja California and Espiritu Santo Island; type from La Paz. 



Fruticose, densely glandular-puberulous; leaf blades broadly ovate, 1.4 to 

 2.5 cm. long, obtuse, subcoriaceous, crenate-dentate, griseous-puberulous, reticu- 

 late; panicle terminal, few-headed; heads 1 cm. high, about 28-flowered. (Descrip- 

 tion compiled.) 



44. Coleosanthus macromerus (Robinson) Blake. 



Brickellia tnacromera Robinson, Mem. Gray Herb. 1: 107. /. 83. 1917. 

 Known only from the type locality, head of Concepcion Bay, Baja California. 

 Fruticose, whitish-barked, hirtellous, with very long internodes; leaf blades 

 1.5 to 3 cm. long, chartaccous, hirtellous, slightly reticulate beneath; heads 



1.4 cm. high, pedicellate, in few-headed terminal umbellate panicles. (Descrip- 

 tion compiled.) 



45. Coleosanthus peninsularis (T. S. Brandeg.) Blake. 

 Brickellia -peninsularis T. S. Brandeg. Zoe 5: 160. 1903. 

 Baja California and Socorro Island; type from La Chuparosa. 

 Frutescent, griseous-scabrid-pubescent and glandular, about 2.5 meters high; 



leaf blades ovate, 3 to 8 cm. long, chartaceous, reticulate, griseous-puberulous; 

 heads corymbose-panicled, 14 mm. high, about 30-flowered; phyllaries acute to 

 acuminate, the outer glandular-puberulous, recurved at tip. 



46. Coleosanthus rhomboideus Greene, Erythea 1: 54. 1893. 

 Brickellia rhomboidea Greene, Pittonia 2: 103. 1890. 



Known only from the type locality and vicinity, Guaymas, Sonora. 



Fruticose, whitish-barked, puberulous; leaf blades deltoid-ovate to broarlly 

 rhombic-ovate, 3 to 6 cm. long, rather thin, entire or bluntly undulate-serrate, 

 slightly puberulous; heads umbellate-panicied, 12 mm. high, about 50-flowered, 

 on stipitate-glandular pedicels 1 to 4 cm. long; phyllaries acute (outer) to obtuse. 



47. Coleosanthus lanatus (DC.) Kuntze, Rev. Gen. PL 1: 328. 1891. 

 Bulhostylis lanata DC. Prodr. 7: 268. 1838. 



Bidbostylis rigida Hook. & Arn. Bot. Beechey Voy. 297. 1840. 



Brickellia lanata A. Gray, PI. Wright. 1 : 84. 1852. 



Jalisco, Guanajuato, and (?) Tepic; type from vicinity of Guanajuato. 



Suffrutescent, canescent-lanate; leaf blades oblong to oval, 2.5 to 5.5 cm. long, 

 coarsely serrate, coriaceous, canescent-lanate and reticulate beneath, narrowed 

 at base, very short-petioled; heads in a narrow panicle, solitary in the upper a.xils, 



1.5 cm. high, about 50-flowered; phyllaries strongly graduate, ovate to oblong, 

 arachnoid-cihate, chiefly obtuse and mucronulate, usually purplish. 



47a. Coleosanthus lanatus microdontus (Robinson) Blake. 



Brickellia lanata microdonta Robinson, Mem. Gray Herb. 1: 119.f.94,^. 1917. 



Cohma and Jalisco; type from Colima. 



Leaves subsessile, cordate at base and more or less amplexicaul, merely 

 denticulate. 



