302 COMPOSI? At CHRYSOTHAMNUS. 
- 
olate to linear, all but the innermost with conspicuous and spreading 
‘mostly elongated-subulate foliaceous tips: rays 2-7, 3 or 4 lines long: disk- 
flowers 10-16. Achenes soft-pubescent. In the mountains of eastern 
Oregon and Washington tu California. . 
10 CHRYSOTHAMNUS Nutt. Trans Am hil. viii, 323. 
Perennial herbs or suffiuticose plants with linear or oblong 
sessile alternate leaves and rather small corymbose heads of 
yellow flowers. Heads 5-flowered, rarely 6- or 7-flowered in- 
volucre campanulate, its bracts imbricated mostly concave or 
carinate, dry and chartaceous, destitute of green tips. Recep- 
tacle flat, alveolate-toothed, the teeth fleshy or somewhat lacer- 
ate. Co oll:s narrow. Style branches with exs+:t-d -ubulate 
or setaceous-filiform appendages. Achenes slender somewhat 
compressed, silky villous. Pappus simple, of copious 
capillary bristles. 
C. pumilus Nutt Trans. Phil. Soc. vii, 323. Bigelovia Douglasii var 
pumila ‘ir y. Branches erect, numerous, 6-10 inches high, glabrous, 
very leafy: leaves an inch long or more, glabrons slightly g!utinous, nar- 
rowly linear. very acute, 3-nerved, often involute or occasionally some- 
what twisted: involucre 2-3 lines high the bracts not very distinetly 4- 
ranked, the outer short, ovate-lanceolate, the inner ob!ong-linear, not 
acute, faintly carinate Dry plains eastern Washington to Montana and 
Utah. i 
C. puberulus (:reene Eryth iii, 93. Bigelovia Douslasii car puberula 
Gray. Pubernlent to almost hispidulous throughout: branches numer- 
ous, j-10 inches high, very leafy: leaves narrowly linear very acute 10-15 
lines long, 3-nerved: involucre 2-% lines high, the br cts 4-ranked, the 
outer ovate-lanceolate, the inner oblong-linear On desert plains, Idaho 
to Utah and Nevada. 
€. viscidiflorus Nutt.].c. 324, Bigelovia Douglasi: Gray > hrub 2-6 
feet high, fastigiately branched: leay s 2 inches long, nar owly linear, 
very acute, rather firm, 3 nerved, their margins more or less distinctly 
serriulate scabrous: heads numerous, in an ample fastigiate terminal cor- 
yml, 3-4 lines high: bracts of the involucre linear-oblong, abruptly acute, 
2-4 in each vertical rank. Plains of the “olumbia. 
C. speciosus Nutt. |.c. Bigelovia graveolens Gray in part. Shrab 
2-4 feet high with rather slender stems terminated by an ample rather 
open cymous corvmb of yellow flowers: leaves very narrowly linear and 
branches of the inflorescence minutely white-tomentose: bracts of the in- 
volucre firm acutish, not ciliate. tomentose on the back. at least near the 
tip, in 3-4 vertical ranks: tube of the corolla slender, almost glabrous, 
the limb rather deeply 5-lobed. Dry plains Washington to California 
and Idaho. . 
var albicaulis Nutt. l.c. Stems and branches densely lanate- 
tomentose: tu e of the corolla clothed with long yillous or somewhat 
arachnoid hairs. Idaho. 
C. nanus Ap opappus nanus Eaton. A low branching heath-like 
shrub 3-8 inches high, glabrous and somewhat glutinous: leaves crowded, 
3-6 lines long, linear-spatulate. rigid channelled, acute and with minute 
leaves fascicled in their axils: heads smal], cor. mbed; involucreturbinate, 
of numerous lanceolate carinate chartaceous bracts with scarious margins, 
very acute the outer ones small and passing into the leaves: rays 4-6, disk- 
