CALIFORNIA ACADEMY OF SCIENCES. 275 



On the mountains near San Luis Obispo, July, 1885. 



The appearance of this plant is strikingly different from 

 any form of the species to which I have referred it, but no 

 sufficient grounds for its separation have been found. 



C. Thurberi, Watson, var. cryptantha. "Whole plant yel- 

 lowish, forming a thick, often nearly globular mass of in- 

 terwoven branches: flowers entirely included: stamens, 3. 



Mojave Desert, Lancaster Station, July, 1884. 



C. (mucronea) insignis. Slender branching, glandular- 

 puberulent, 2 — 4 inches high: radical leaves in a rosulate 

 tuft 6 — 12 lines long, linear-spatulate, glabrous: involucres 

 glandular-puberulent, of five linear somewhat corrugated seg- 

 ments, united in the intervals by membranous bands, and 

 terminating in equal straight diverging awns: flowers six in 

 each involucre: pedicels about as long as the tube: peri- 

 anth pale rose-color, villous, exserted: segments oval or 

 oblong: stamens, 9: akenes lenticular. 



Indian Valley, near the Salinas River, June, 1885. 



Whole plant of a reddish color like E. Calif arnica, Gray. 

 It is most nearly related to C. leptaceras, Watson, though 

 with no trace of spurs at the base of the involucre, the pecu- 

 liar structure of which admits of considerable expansiou, 

 so much that in the living plant it appears rather broadly 

 turbinate. 



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