OBSERVATIONS ON THE COMPOSITR. 109 
nearly cylindric throat cleft a fourth to a third the way down; 
pubescence of the achenes abundant, long, appressed, not 
very fine : style-appendages at least twice the length of the 
stigmatic portion. 
Abundant on alkaline plains east of the Rocky Mountains, 
from the upper Arkansas and Platte, ranging northeastward 
to Dakota, then westward along the line of the British 
boundary possibly as far as British Columbia. Apparently 
not in the Great Basin unless eastwardly about Salt Lake. 
It was doubtless this species which Pursh mistook for the 
Asiatic Chrysocoma dracunculoides (now Aster dracuncu- 
loides) and which in consequence of this error became Bige- 
lovia dracunculoides, DC., and Chrysothamnus dracun- 
culoides, Nutt. 
13. C. speciosus, Nutt. Trans. Am. Phil. Soc, vii. 323 
(1840). Chrysocoma nauseosa, Pall. in Pursh FI. ii. 517 
(1814)?? Size of the preceding, but stems more slender, 
inflorescence more open: leaves very narrowly linear, and 
with the branchlets of the inflorescence minutely white- 
tomentose: involucral bracts firm, acutish, not ciliate, tomen- 
tose on the back, or the inner ones glabrous except near the 
tip, all in vertical ranks of 3 or 4: corolla with slender almost 
glabrous tube rather longer than the subcylindric throat, this 
cleft a third of the way down: pappus copious, fine, only 
delicately scabrous, fuscous at least in age. 
A far-western species, the type being of the upper Missouri, 
but common in Idaho, eastern Oregon, northwestern Cali- 
fornia and adjacent Nevada. Easily distinguished from C. 
graveolens by its slender habit, and almost filiform white 
leaves. 
Var. ALBICAULIS Nutt.1.c. Linosyris albicaulis, T. & G. 
Fl. ii. 234 (1842). Bigelovia graveolens, var. albicaulis, 
A. Gray, Proce. Am. Acad. l.c., not of Bot. Calif. Stem and 
Branches densely lanate-tomentose ; foliage as in the type: 
tube of corolla clothed with delicate long-villous or somewhat 
arachnoid hairs. 
