414 COMPOSITAE 
20. oeneigy tripartita Rydb. Cutleaf Sagebrush. Fig. 5712. 
Artemisia trifida Nutt. Trans. Amer. Phil. Soc. II. 7: 398. a Not Turez. 1832 
Artemisia 'tripartita mae Mem. N.Y. Bot. Gard. 1: 432. 
Artemisia tridentata ahs trifida Hall & Clem. Carne . os . Wash. Publ. Mo,.326:_137:; 1923; 
Artemisia tridentata trifida McMinn, Ill. Men. Calif. Snrace 608. 1939 
A low ad evergreen shrub, 2-8 dm. high with a shiek central trunk or with numerous 
br anches : ssbstbudiver from the base, frequently root- cbircastiags mildly aromatic, bark light brown 
or grayish, shredding on older branches ; twigs canescent. Leaves of vegetative shoots 0.5-3 cm. 
long o r rarely onger, canescent, sorely ‘divided into 3 linear or narrowly linear-lanceolate lobes 
i i mselves be 3-cleft or som i i 
meng g paniculiform; involucre campanu age no nig -3 mm. wide, the phyllaries canes- 
cen ci uter ones broadly ovate: sometimes with a w herbaceous tip, the inner ones oblong 
ray- “hon: absent ; disk-florets 4-7 (r: ane ee, fertile ehenes taste or nearly cylindrical 
resinous- beam uliferous ; sation glabrous. n= 9, 18. 
Dry hills and ohana Upper Sonoran and aie Transition Zones; eastern Washington and no rtheastern 
Oregon, through noe yout Ida = Wg Wyoming, northern Utah, and western Mostiie: Type locality: ‘‘Plains of 
21. Artemisia cana Pursh. Hoary Sagebrush. Fig. 5713. 
Artemisia cana Pursh, FI. ign nary 521. 1814. 
Artemisia columbiensis Nutt ~at 142. 1818. 
Low, rounded, evergreen (at least in our area) shrub, 4-9 = rarely to 15) dm. high, often 
root- audio: freely branching, somewhat fastigiate, mill aromatic; twigs striate, canescent ; 
older a hes covered with a brown fibrous bark. Leaves of “vegetative shoots cm. long, 
0.1-0.7 cm. wide, linear or linear - obla iiiiate, — amie oh ute or acuminate or sometimes with 
1-2 ietdentas teeth or lobes, silvery-canescent, sometimes becoming wieciduboas with age; leaves 
of the inflorescence similar, reduced above ; in erences Bi Sa or i reduced, in 
the extreme aay aan volucre campanulate, 2.3-4.5 mm. wide, 3.5-5 mm. high, the outer 
ee or ovate as an acute or acuminate tip and eniely cancscent: or only sparsely 
ner phyllaries elliptic to ae nea ate with a broad scarious margin, canescent 
ee ne sar iG se 8 us; ray-florets absent ; disk-florets 8-20, rarely fewer, fertile; achenes cylindric- 
tur ee: granuliferous : receptacle glabrous. » = =. 3 
Mostly on low ground, Upper Sonoran, Transitio: nadia southea n Oregon and eastern 
California south to Mono County east to Saskatchew am Tease, =i Caloskdo; ncaa foi ouster sites t gw n 
A. tridentata and also more tolerant of alkali. Type locality: bluffs of the Missouri River. Collected by Lewis. 
Artemisia cana subsp. dolbadent (A; crs y) G. Ward, Contr. Dudley Herb. 4: 192. 1953. (Artemis: 
neg A. — Proc. Am 19; 50. 1883; A, “ipudentat or. bolandcri Hall & Clem. D oveait eg 
ash. Publ. No. 326: 139. Ts23 — WideWiels var. bolar di ot Mags pis Calif. Shr . - . vn 
She ub 2-6 high, much branched, often root-spro vatiae neg 1— long, 0. 1-0 m. 
linear or bean: oblanceolate and entire or sometimes dilated at the ip oa divided into 3 “narrow = Mes apees. 
canescent; involuc A i sely canescent; disk-florets 8-16. This neces differs from A. cana suhep. cana 
mainly in its sm = ke e and usually somewhat more ee lea = 9. Limited t a the area around Mono 
Lake, Mono Coanty, California, Type locality: Mono . Me fe a alige County ail Sierra Nevada. 
22. Artemisia rothréckii A. Gray. Timberline Sagebrush. Fig. 5714. 
Artemisia rothrockii A. Gray, Bot. Calif. 1: 618. 
Artemisia tridentata subsp. rothrockit Hall & Cle Cocueats tout, Wash. Publ. No. 326: 139. 1923. 
Artemisia tridentata var. rothrockii McMinn, Ill. "Man. Calif. Shrubs 608. 1939 
Low, spreading, evergreen shrub, 2-6 dm. high, often sage? “sprouting, mildly aromatic, bark 
light gray or straw-colored to dark grayish brown, fibrous o older stems ; twigs striated, “re — 
.5-5 
with a dense tomentum at least when young. Leaves of vereiative chooks cm. long, 5 
cm. wide, broadly cuneate or flabelliform, 3-toothed ti ceolate or 
oblanceolate and entire, 1 escent, someti becoming glabrate or viscidulous with age; 
leaves of flowering shoots similar or all lanceolate and ntire; in ence s m to narrowly 
paniculiform ; involucre campanulate, m, wide, 4-5.5 high, the nites phyllaries ovate with a 
acute or acuminate rea and canescent or only sparsely tomentose, the in = phyllaries elliptic to nar- 
rowly obovate and usually sparsely tomentose labrous; ray-florets absent; disk-florets nee 
to glabro: 
oe wae: fertile: achenes cylindric-turbinate, granuliferous ; poche: glabrous. 2 | 
y sites or sometimes in moist pockets at lower Ts Boreal Zone; mostly at high elevations in 
the Bowed Nevada and the White and San Ferns eee Mountains of California. Type locality: Monache 
Meadows, Tulare County, Sierra Nevada. Aug.—Sep' 
23. Artemisia rigida (Nutt.) A. Gray. Scabland Sagebrush. Fig. 5715. 
Ariomisis trifida or rigida Nutt. ap Amer. Phil. rao II. 7: 398. 1841 
A. Gray, Proc. Amer. Acad. 19: 49. 18 
Low, spreading, ie ah ub, 1-4 dm ot probably never root-sprouting, pungen ntly aro- 
matic ; ce thick and rigid, the older covered with dark gray, shredding bark, the twigs striated 
and covered with a dense tomentum at least when Leaves of ucts shoots silvery- 
— . lon i i ie: into 
