194 GENUS CHRYSOTHAMNUS. 



long, lanceolate, nearly erect, glabrous; anther-tips lanceolate, acute, about 0.6 mm. 

 long; style-branches long-exserted, the slender appendage about the length of the stig- 

 matic portion, achenes nearly prismatic, 4-angled, and with strong vertical ribs between 

 the angles, 6 to 7 mm. long, smooth and glabrous to minutely but densely puburulent 

 (various degrees on the same plant) ; pappus exceeding the corolla, fine and soft, tawny. 

 {Linosyris pulchella Gray, PI. Wright. 1 :96, 1852; Torrey, Sitgreaves Rep., plate 4, 1853.) 

 Southern Rocky Mountains and western Kansas south into Mexico; southern Colorado, 

 Kansas, New Mexico, western Texas, northern Chihuahua, Utah. 



SUBSPECIES. 

 Chiefly because of the small amount of field work that has been given to this species, 

 its forms and their relationships to one another are not well understood. Three species 

 have been described and are here taken as subspecies, as follows: 



Key to the Sxibspedes of Chrysothamnus pulchellua. 

 Leaves glabrous on the faces; shrub low. 



Margins of the leaves glabrous (a) typieus (p. 194). 



Margins of the leaves scabrous-ciliolate (6) baileyi (p. 194) . 



Leaves finely and densely puberulous on both faces; shrub tall (c) elatior (p. 194). 



8a. Chrysothamnus pulchellus typicus. — Shrub low, probably under 5 dm. high, 

 openly branched; leaves filiform to narrowly linear, perfectly glabrous; peduncles 

 glabrous; involucre 10 to 13 mm. or less high; bracts gradually acuminate. {Linosyris pul- 

 chellus Gray, 1. c). Throughout the range of the species, except easterly. Type locality, 

 prairies below El Paso (western Texas), according to Gray (PI. Wright. 2:80, 1853). 

 Collections: Type collection, October, 1849, Wright 287 (Gr, US); White Sands, Otero 

 County, New Mexico, Wooton 2501 (US) ; north of Deming, New Mexico, Goldman 1505 

 (US); Colonia Diaz, Chihuahua, Nelson 6454 (Gr). 



Sb. Chrysothamnus pulchellus baileyi (Wooton and Standley). — Shrub low, 

 probably under 5 dm. high, densely branched; leaves linear or linear-oblong, minutely 

 ciliolate with short stout hairs, otherwise glabrous; peduncles glabrous ; involucre 10 to 12 

 mm. high; bracts abruptly acuminate, mostly bristle-pointed. (C. baileyi Wooton 

 and Standley, Contr. U. S. Nat. Herb. 16: 181, 1913.) Kansas to New Mexico and Texas. 

 Type locality, north end of the Guadalupe Mountains, New Mexico. Collections: 

 Kearney County, Kansas, 1897, Hitchcock (Gr, NY, US); dunes south of Mustang 

 Spring, Texas, September, 1881, Havard (NY, US); type collection, September 4, 1902, 

 Vernon Bailey 490 (US); bad lands at Ojo Alamo, northwestern New Mexico, Hall 

 111S3 (UC); White Mountains, Lincoln County, New Mexico, Wooton 508 (NY, US). 



8c. Chrysothamnus pulchellus elatior (Standley). — Shrub tall, about 7.5 to 10 

 dm. high, slender; leaves linear, finely and densely puberulous on both faces; peduncles 

 puberulous; involucre 9 to 12 mm. high; bracts abruptly acuminate. (C elatior Standley, 

 Proc. Biol. Soc. Wash. 26:118, 1913.) Southern New Mexico. Type locality, sandhills 

 north of Goldenbergs, San Andreas Mountains, Dona Ana County, New Mexico. Col- 

 lection: Type collection, October 12, 1912, E. 0. Wooton (US). 



SYNONYMS. 



The synonymy of this species is so limited that it is all included in the above text, with the single exception 

 of Bigelovia pulchella Gray (Proc. Am. Acad. 8:643, 1873), which is C. pulchellus typicus. 



RELATIONSHIPS. 

 There can be no question that this species is more closely related to C. depressus than 

 to any other. The connection between them and their relation to other forms will be 

 taken up under that species. C. bigelovi also has been associated with this species, 



