OBSERVATIONS ON THE COMPOSIT. ee 
Santa Rita Mountains, southern Arizona, Brandegee. Per- 
haps on the strong characters of the corolla alone this should 
be admitted to specific rank. 
Var. (?) Plattensis. Low and merely suffrutescent ; 
seldom a foot high, very leafy, the long narrowly linear white- 
tomentose leaves spreading or recurved: involucral bracts 
about 3 in each vertical rank, acute, glabrous except that 
the margins are rather densely woolly-ciliate: tube of corolla 
somewhat pubescent; throat elongated, rather deeply cleft. 
Plentiful on alkaline plains of the Platte and elsewhere 
along the eastern base of the Rocky Mountains; associated 
with C. graveolens, but very distinct from that, flowering 
earlier ; referable to C. speciosus unless a distinct species. 
This will probably be the Chondrophora nauseosa of Britton 
Mem. Torr. Club. y. 317. 
14. C. Californicus. Bigelovia graveolens, var. albicaulis 
A. Gray, Bot. Calif. i. 317 (1876) as to the Californian plant, 
but not as to the description, nor of Proc. Am. Acad. (1873). 
Stout and rather low, seldom 2 feet high; flowering branches 
densely white-tomentose, the foliage also usually so; heads 
mostly in a somewhat ample terminal pyramidal panicle : 
leaves numerous, spatulate-linear or narrowly oblanceolate, 
2 inches long or more, acutish ; carinate by a rather strong 
and prominent midvein: heads large, often 7 or 8 lines high; 
involucre and the pedicels distinctly glandular-puberulent, 
often also tomentulose; bracts about 3 in each vertical rank, 
all acute: corolla 5 lines long, the slender sparsely short-hairy 
tube not as longas the subcylindric rather deeply cleft throat; 
filiform style-appendages scarcely longer than the stigmatic 
part: achenes with a dense but short appressed pubescence ; 
pappus dull-white, hardly scabrous. 
Common in the higher Sierra Nevada of Placer and Nevada 
Counties, California, and very distinct from all forms of C. 
speciosus by its low stout habit, broad leaves, glandular 
involucres, etc. Itis solely on the strength of a glabrate-leaved 
state of this that ‘“ Bigelovia graveolens var. glabrata” has 
been credited to California. 
