298 COMPOSITAE 
long, 0. = mm. wide; heads paniculate, very numerous, 5-8-flowered; involucre subcylindric, 
igh; phyllaries ane — wid aracuate, the vertical it not sha rply defined, oblong, 
obtuse, whitish, indurate, t na obscure, scarcely or not at all glandular- thickened 
above; achenes appressed- pec . sericea pappus brownish white 
tony open deserts, not com Low oran Zone; oo: and Boleendies Deserts, California, east to 
southwestern Utah and Arizona. Syne eins: etthernis, ”* June—Dec 
2. Chrysothamnus teretifélius (Dur. & ye Oe H. M. Hall. Needle-leaved 
Rabbit-brush. Fig. 5 
errs dts ets vps & Hilg. + gabe Acad. Phila. II. 3: 41. 1855; also Pacif. R. Rep. 329. ploy... 1857. 
Bigelovia teretifolia A. Gray, Proc. Amer. Acad. 8: 644, 1873. 
cies dus andit K e, Rev. Gen. PI. “v4 a ” 
Chrysoma veal Shea Erythea 3: 895. 
Chrysothamnus teretifolius H. M. Hall, a Calif. Pub. Ag 3: 57. 1907, 
Ericameria tcretifolia Jepson, Man. FI. Pl. Calif. 1024. 1925. 
Fastigia = bak a d, globose or spreading shrub 2-15 dm. high, the age ice densely 
glandular-punctate, ba Isamic- -resinous, dark green. Leaves terete, obtuse, not mucronate, 1-2.5 
; heads in fl 
yet wi ; Cal : lu 
gh; eo ries 4s. seriate, strongly graduate in rather definite vertical ranks, obldng, 
obtuse, ineieat stramineo obscurely ener Sore ed with a conspicuous, green, sinuduiar 
spot; achenes a acd vile pappus stram 
Ca anyon walls and rocky slopes, Lower Sonoran Zon bias Rosa Mountains, Riverside County, to Tehachapi 
Mountains and across the Mojave Desert to southern Sins County and _ Kingston Mountains, Califor ‘a east 
to Utah and Arizona. Type locality: ‘‘all over the mountains around Tejon Valley, California.’’ Sept.— 
3. Chrysothamnus albidus (M. E. Jones ex A. a Greene. White-flowered 
Rabbit-brush. Fig. 5505 
Bigelovia albida M. E. Jones ex A. Gray, Proc. Amer. Acad. 17: 209. 1882. 
Chrysothamnus aibidus Greene, Ripe: 3: 107. 1895. 
Shrub 3-10 dm. high, easier branched, white-barked, glabrous, resinous-viscid, aromatic. 
Leaves filiform, 1.5-3 cm. long, mm, wide, terete, mucronate, impressed-pun unctate, crowded, 
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Hp, ‘he inner oblong, acuminate-tipped, t rrow hyaline margin somewhat erose; corollas 
-8 aie Mast ng, the lobes about 2 mm. Tae achenes pilose, glandular saeviek pappus copious, 
ssbb the co 
Dry, alkal Sak or silty soils, Sonoran Zones; Owens Valley and — Valley region, California (rare), 
east to the Salt 5 aes He Desert, Utah. Type locality: Wells, Nevada. Aug.—Oct 
4. Chrysothamnus viscidiflérus (Hook.) Nutt. Sticky-leaved Rabbit-brush. 
Fig. 5506 
Crinitaria viscidifiora Hook. F1. Bor. Amer. 2: 24. 1834. 
elovia viscidifiora DC. Tres Y ie eno 1838. 
hrysothamnus viscidiflorus Nutt. Trans. Amer. Phil. Soc. II. 7: 324, 1840. 
Sscidi 
Linosyris ora Torr. &G N —. 2:2 
elovia douglasit A. Gray, Proc. A : 645. 1873. 
PvE Su douglasit var. tortifolia A. Gray, si ci ca 
er viscidifiorus Kuntze, R n. 18 
idi, ev. 
" ide Sasa viscidiflorus var. tortifolins Greene, ‘Erythes 3:96. 1895. 
Chrysothamnus tortifolius Gre 18 
Chr ysothamans douglas Cea & iat gi sariay Mt. Fis. 266. 1914. 
Ri fastigiately branched, white-barked shrub usually less than 1 m. high, the plo 
brittle. Leaves linear or i re er olate, flat or twisted, erect, spreading, or reflexe 2-5 c 1 
long, 2-5 mm. wide, 1-3-n d, glabrou oar sometimes scabrous -ciliolate, viscid, sometimes with 
punctate e glands ventrally ; ends about 5-flowered, in term phere broad cymes; involucre 5-7 mm. 
high; phyllaries ihear'ctdote to lanceolate, obtuse i a purse monly mucronate) to acute, not 
keeled, strongly graduate but in o| re cal rank chartaceous; achenes + ie villous ; 
pus brownish white. A highly sat com ies 
Dry plains and hillsides, at low or moderate elevations, Upper Sonoran and Arid lg cong ~ age east of 
the Cascade-Sierran axis from soabieeret British Columbia to southern Castor. east to New Mexico and ogre 
tana; this CO haa subspecies most frequent in Pood by in in Rocky Mountain Type locality: Garren: Slain of t 
Columbia, from the Great Falls to the Mountains.” Collected by Douglas. tae rae A fk of several te x 
intergrading subspecies of overlapping distri Rosen 
Key to Subspecies 
Leaves glabrous (sometimes viscid or with punctate glands ventrally) at least on the faces, the margin sometimes 
scabrociliate. 
Shrubs mostly 4-12 dm. high (shorter in some wide-l re wide. 
Leaves Ante to linear-lanceolate, tian to base and apex, 2-5 mm. wite: 4a we aaneks acute 
acumi- 
widespread. su ubsp. Ciciditorss 
Pop Seoniity elliptic to elliptic-oblong, 6-12 mm. wide, 3—5-nerved, -obtuse but mucronate; shrubs often 
only 2-4 dm. high; nearly limited to northeastern Nevada. subsp. latifolius. 
