OBSERVATIONS ON THE COMPOSITZ. 113 
17. C. junceus. Bigelovia juncea, Greene, Bot. Gaz. vi. 
184 (1881). Aster Edwardii O. Ktze, 1. ¢. 316. Taller and 
more slender, the broom-like tufts of long erect rush-like 
branches green and nearly or quite leafless: heads in small 
fastigiate cymes at summit of the branches ; involucral bracts 
in vertical ranks, all obtusish : corolla-lobes short, hairy. 
Collected only by the present writer, many years since, on 
bluffs of the Gila River in southeastern Arizona. 
18. €. Mohavensis. Bigelovia Mohavensis, Greene, in 
Gray, Syn. Fl. 138 (1884). Aster Mohavensis, O. Ktze, 1. ¢. 
318. Rush-like branches few, stout, flexuous, glutinous, 
sparingly leafy: leaves an inch long: involucral bracts 
obtuse : corolla-lobes narrowly lanceolate, glabrous. 
Mohave Desert in California ; also in adjacent Nevada. 
19. (€. leiospermus. Bigelovia leiosperma. A. Gray, 
Syn. Fl. 139 (1884). Aster leiospermus, O. Ktze, 1. ¢. very 
like the last in habit and aspect; readily distinguished by 
the very short ovate teeth of the corolla, and the completely 
glabrous achenes. 
Southern portions of Nevada and Utah. 
20. C. Parryi. Linosyris Parryi, A. Gray, Proc. Philad. 
Acad. 66 (1863). Bigelovia Parryi, A. Gray, Proc. Am. 
Acad. l. ec. Aster Harbourii, O. Ktze, 1. c. 316. Stout, a 
foot high or more, quite leafy, and with ascending branches: 
leaves linear, narrowed at base, 2 inches long or more, some- 
what tomentose like the branches, or glabrate: heads quite 
thyrsoidly disposed up and down the branches, large, 10 to 
15-flowered; involucral bracts lanceolate, attenuate-acumi- 
nate: corolla-tube hirsutulous. 
Parks of the Colorado Rocky Mountains. 
21. €. Howardii. Linosyris Howardii, Parry in Gray, 
Proc. Am. Acad. vi. 541 (1865). Bigelovia Howardii, A. 
Gray, 1. c. viii. 641 (1873). Aster Howardii, O. Ktze, 1. ec. 
318 (1891). Chondrophora Howardii, Britton, Mem. Torr. 
Club, v. 317 (1894). Similar to the last in habit, rather 
