STANDLEY TREES AND SHEUBS OF MEXICO 1475 



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

 Brickellia squamulosa A. Graj^, Proc. Amer. Acad. 15: 30. 1879. 

 Chihuahua to Guanajuato; type from City of San Luis Potosf. New Mexico 



and Arizona. 



Shrub 50 cm. high; stem leaves sessile, parallel-veined, 3 to 7 cm. long, 1 to 

 1.5 mm. wide, mostly absent in flowering specimens; panicle dense, narrow, 

 elongate; many of the pedicels bearing small cypress-like bulblets; heads about 

 12 mm. high. ^ 



2. Coleosanthus spinulosus (A. Gray) Kuntze, Rev. Gen. PL 1: 328. 1891. 

 Clavigera spinulosa A. Gray, Mem. Amer. Acad. n. ser. 4: 63. 1849. 

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



Chihuahua to Zacatecas and San Luis Potosi; type collected near Chihuahua 

 City. 



Similar to C. squamulosus; leaves linear to linear-lanceolate, spinulose-serrate, 

 petiolate, glabrous, 1 to 1.7 cm. long, 1 to 3 mm. wide. 

 2a. Coleosanthus spinulosus asperatus (Robinson) Blake. 



Brickellia squamulosa asperaia Robinson, Mem. Gray Herb. 1: 35. 1917. 



Known only from vicinity of City of Chihuahua. 



Leaves papillose-asperate. 



3. Coleosanthus vernicosus (Robinson) Blake. 



Brickellia vernicosa Robinson, Proc. Amer. Acad. 36: 487. 1901. 



Durango; type from Santiago Papasquiaro. 



Shrub 50 cm. high, resinous-puberulous; leaves short-petioled, the blades 

 ovate or oval-ovate to (on the branches) narrowly lanceolate, 1 to 1.7 cm. long, 

 4 to 12 mm. wide, serrate, short-petioled; heads racemed on the branches, 13 to 

 16 mm. high. (Description compiled.) "Barba de chivo." 



4. Coleosanthus frutescens (A. Gray) Kuntze, Rev. Gen. PI. 1: 328. 1891. 

 Brickellia frutescens A. Gray, Proc. Amer. Acad. 17: 207. 1882. 



Baja California; type from Tantillas Canyon. Nevada and California. 



Low much-branched shrub, griseous-tomentellous; leaves alternate, the blades 

 spatulate, 3 to 12 mm. long, 1.5 to 4 mm. wide, 1-nerved, entire or sparsely 

 denticulate; heads pedunculate, loosely panicled, 14 mm. high, about 26-flowered. 



5. Coleosanthus microphyllus (Nutt.) Kuntze, Rev. Gen. PL 1: 328. 1891. 

 Bulbostijlis microphylla Nutt. Trans. Amer. Phil. Soc. II. 7: 286. 1840. 

 Brickellia microphylla A. Gray, PI. Wright. 1: 85. 1852. 



Brickellia cedrosensis Greene, Bull. Torrey Club 10: 86. 1883. 



Coleosanthus cedrosensis Greene, Erythea 1: 54. 1893. 



Brickellia grayana Hieron. Bot. Jahrb. Engler 28: 583. 1901. 



Cedros Island, Baja California. Oregon to California; type from Blue 

 Mountains, Oregon. 



Shrubby, viscid-pubescent, about 50 cm. high; leaves alternate, the blades 

 thick, toothed, those of the branchlets reduced; heads mostly terminating short 

 branchlets, 10 to 12 mm. high, about 22-flowered; at least the outer phyllaries 

 with short herbaceous spreading tips. 



6. Coleosanthus cylindraceus (Gray & Engelm.) Kuntze, Rev. Gen. PL 1 : 



328. 1891. 



Brickellia cylindracea Gray & Engelm. Proc. Amer. Acad. 1: 46. 1847. 



Coahuila. Texas; type from Guadalupe River, near New Braunfels. 



Shrubby at base, 0.2 to 1.2 meters high, griseous-puberulous; leaves chiefly 

 opposite, the blades 2 to 6 cm. long, 1.2 to 3 cm. wide, crenate-serrate; heads 

 racemose or thyrsoid-panicled, slender-pediceled, about 12 mm. high, about 

 10-flowered. 



