302 COMPOSITE v CftRYSOTHAMNUS. 



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 to California. 



10 CHRYSOTHAMNUS Nutt. Trans Am hil. viii, 323. 



Perennial herbs or suffruticose 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. Cooll<s narrow. S'yle branches with exs^'t d s-ubul^te 

 or setaceous-filiform appendages. Achenes slender somewhat 

 compressed, silky villous. Pappus simple, of copious 

 capillary bristles. 



(\ pumilus Nutt Trans. Phil. Foe. vii, 323. Bigelovia Douglasii rar 

 pumila 'ir-y. Branches erect, numerous, 6-VD inches high, glabrous, 

 very leafy: leaves an inch long or more, glabrous slightly glutinous, nar- 

 rowly linear, very acute, 3-nerved, often involute or occasionally some- 

 what twisted : involucre 2-3 lines high the bracts not very distinctly 4- 

 ranked, the outer short, ovate-lanceolate, the inner oblong-linear, not 

 acute, faintly carinate Drv plains eastern Washington to Montana and 

 Utah. 



C. puberulus (SreeneEryth iii, 93. Bigelovia Dnnjlusii >-ar vubenila 

 (Tray. Fuberulent to almost hispidulous throughout: branches numer- 

 ous,' <>-!() 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. 



C. viscidiflorus Nutt. 1. c. 324, Bigelovia Do/iglasi< ^'ray >hrub 2-6 

 feet high, fastigiately branched : leav s 2 inches long, nar owly linear, 

 very acute, rather firm, 3 nerved, their margins more or less distinctly 

 serrulate scabrous : heads numerous, in an ample fastigiate terminal cor- 

 ymb, 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. 1. c. Bigelovia graveolem Gray in part. Shrub 

 2-4 feet high with rather slender stems terminated by an ample rather 

 open cymous corymb of yellow flowers: leaves very narrowly linear and 

 branches of the inflorescence minutely white-tomentose: bracts of the in- 

 volucre firm acutish, not ciliate tpme'ntose 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. 



yar albicaulis Nutt. I.e. Stems and branches densely lanate- 

 tomentose : tu e of the corolla clothed with long villous or somewhat 

 arachnoid hairs. Idaho. 



C. nanus Aplopapf'US nanus Eaton. A low branching heath-like 

 shrub 0-8 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 small, cor mbed ; involucre turbinate,. 

 of numerous lanceolate carinate chartaceous bracts with scarious margins, 

 very acute the outer ones small and passing into the leaves : rays 4-6, disk- 



