STANDLEY TREES AND SHRUBS OF MEXICO 1477 



13. Coleosanthus cuspidatus (A. Gray) Greene, Erythea 1: 54. 1893. 

 Brickellia cuspidata A. Gray in S. Wats. Proc. Amer. Acad. 22: 421. 1887. 

 Jalisco; type from Rio Blanco. 



Fruticose or siiffrutescent, 40 to 70 cm. high, puberiilous; leaf blades broadly 

 ovate, 1 to 3 cm. long, 7 to 20 mm. wide, serrate, coriaceous, nearly glabrous; 

 heads loosely panicled, 12 mm. high, about 11-fiowered. 



14. Coleosanthus hastatus (Benth.) Kuntze, Rev. Gen. PI. 1: 328. 1891. 

 Brickellia hastata Benth. Bot. Voy. Sulph. 21. 1844. 



Baja California; type from Magdalena Bay. 



Fruticose, minutely puberulous; leaf blades 3.5 to 10 cm. long, 1 to 6 cm. wide, 

 hastate-lobed at base, obtuse, thinnish, obscurely puberulous beneath; heads in 

 small terminal panicles, about 11 mm. high, 12 or 13-flowered; phyllaries obtuse 

 or obtusish. 



15. Coleosanthus coulteri (A. Gray) Kuntze, Rev. Gen. PI. 1: 328. 1891. 

 Brickellia coulteri A. Gray, PI. Wright. 1: 86. 1852. 



Sonora to Puebla, Colima, and Baja California. Arizona; type from Arizona 

 (probably) . 



Frutescent, up to 90 cm. high, the younger parts puberulous and often glandu- 

 lar; leaf blades triangular or rhombic-ovate, 1.5 to 2.5 (rarely 6.5) cm. long, 1 to 2 

 (rarely 5) cm. wide, thickish, more or less puberulous; heads slender-pediceled, 

 loosely panicled, 9 to 12 mm. high, about 17-fiowered; phyllaries mostly acute to 

 acuminate. 



16. Coleosanthus megalodontus (Greenm.) Arthur, Torreya 21: 12. 1921. 

 Brickellia megalodonta Greenm. Proc. Amer. Acad. 40: 34. 1904. 



Jalisco and Puebla; type from Guadalajara, Jalisco. 



Herbaceous or (?) sufifrutescent, pilosulous or pubescent; leaf blades triangular- 

 ovate, 4.5 to 7 cm. long, 3 to 5 cm. wide, thin, coarsely hastate-toothed; heads as 

 in C. coulteri. 



17. Coleosanthus brachiatus (A. Gray) Blake. 



Brickellia brachiata A. Gray, Proc. Amer. Acad. 21: 385. 1886. 



Chihuahua; type from southwestern Chihuahua. 



Herbaceous or suffrutescent, griseous-puberulous; leaf blades triangular-ovate, 

 3 to 4.5 cm. long; petioles 1 to 1.3 cm. long; heads loosely panicled, 12 to 15 mm. 

 high, about 16-fiowered. 

 17a. Coleosanthus brachiatus adenopodus (Robinson) Blake. 



Brickellia brachiata adenopoda Robinson, Mem. Gray Herb. 1: 63. 1917. 



Sinaloa; type from San Bias. 



Plant puberulous with gland-tipped hairs. 



18. Coleosanthus glabratus (Rose) Blake. 



Brickellia brachiata glabrata Rose, Contr. U. S. Nat. Herb. 1 : 132. 1892. 

 Brickellia glabrata Robinson, Mem. Gray Herb. 1: 63. 1917. 

 Baja California, type from Carmen Island. 



Shrubby, glabrous; leaf blades triangular-ovate, 0.8 to 2.5 cm. long, 0.3 to 

 2.2 cm. wide, acutish to obtuse; petioles 3 to 7 mm. long. 



19. Coleosanthus cymuliferus (Robinson) Blake. 



Brickellia ajmulifera Robinson, Proc. Amer. Acad. 61: 538. 1916. 



Known only from the type locality, Minas de San Rafael, San Luis Potosi. 



Subherbaceous, 30 to 40 cm. high, crisply puberulous; leaf blades hastate- 

 deltoid, 3 to 5.4 cm. long, 2.5 to 3.8 cm. wide, caudate-acuminate, coarsely 

 toothed, puberulous; petioles 1 to 4 cm. long; heads in slender, loosely 3 to 5- 

 headed, axillary cymes, about 12-fiowered. (Description compiled.) 



