968 CARDUACEAE 



r 



J 



brown margins; corollas yellow, loosely pubescent. A, norvegica A. Gray, not 

 Fries. Higher mountains: Colo. — Alta. MonL — Alp. Jl-S. 



21. A. arctica Less. Perennial, with a cespitose caudex; stem 2-4 dm. high,. 

 glabrous or sparingly pubescent above; lower leaves petioled, 5-15 cm. long,, 

 twice pinnately parted, with lanceolate, acute or acuminate divisions, slightly 

 pubescent or glabrate, the upper leaves less divided, smaller and sessile; heads 

 several, in racemose inflorescence, nodding, the lower usuallv on elongated 

 peduncles; involucres 8-10 mm. broad; bracts elhptic, sparingly hairy , T^dth black 

 or dark bro^^^a margins; corollas yellow, usually pilose. A. norvegica pacifica A. 

 Gray. A, longepedunculata Rudolphi. Arctic, subarctic, and alpine situations: 

 Yukon— B.C. (Selkirk Mts.)— Wash.— Alaska; Asia. Au-S. 



22. A. laevigata Standi, A low perennial, with a rootstock; stems -2.5-3 

 dm. high, glabrous, reddish, striate; basal leaves slender-petioled, twice pinnatifid 

 mto oblong-linear, acute divisions, glabrous, 2-6 cm. long; stem-leaves mostly 

 once pinnatifid mto narrow acute divisions; heads 5-8, nodding, in a racemose 

 mflorescence; involucre 8-10 mm. broad; bracts glabrous, ovate, obtuse, green 

 on the back, with broad dark browm erose margins; ray-flowers 5-10. Moun- 

 tams: Alta. Subalp. 



A^^' \^^^^^ -^' Gray. Perennial, with a cespitose caudex; stem glabrous^ 

 2-4 dm. high; leaves twice to thrice pinnatifid , with linear divisions, glabrous; 

 heads rather many racemosely or paniculately disposed, nodding; involucres 

 5-7 mm. broad, glabrous; bracts elliptic or oval with light brown margins; cor- 

 ollas yellow, glabrous. Alpine peaks: Colo.— e Utah. Subalp. An. 



24. A. franserioides Greene. Perennial, with a rootstock; stem 3-10 dm. 

 high, minutely puberulent or glabrous; leaves twice or thrice pinnatifid, with 

 oblong, obtusish divisions, green and glabrous above, pale and usually minutely 

 tomentulose beneath; heads numerous, in a narrow panicle, nodding; involucres 

 about 6 mm. broad, sparingly tomentose; outer bracts hnear, green, the inner 

 oblong, scarious-margmed; corollas 40-90, glabrous; marginal flowers few. Moun- 

 tarns: Colo.— N.M.; Mex. SubmonL J1~S. 



25. A. vulgaris L. A stout perennial, with a rootstock; stem 5-15 dm. 

 high, sparingly t9mentose when young; lower and middle leaves ovate in outhne, 

 pinnately or bipmnately divided to near the midrib, green and glabrate above, 

 white-tomentose beneath, 5-10 cm. long; primary divisions 5-7, obovate, oblong, 

 or oblanceolate, acute, the ultimate lanceolate, often few-toothed; upper leaves 

 pinnatifid, with lanceolate or linear divisions, or simple; heads very numerous in 

 a leafy panicle; involucre about 4 mm. high, 3-4 mm. broad, more or less tomen- 



6-12. Waste 



w^^Vj"^^'^'~*^^~^^-' ^-^-J escaped from cultivation; native of the Old 



World. 



k- ^^* A' "^^^™LP*^ ^^tt. Perennial, with a creeping rootstock; stem 3-6 dm. 

 high, glabrate or at first slightly floccose; leaves soon glabrate above, tomentose 



outline 

 divisions 



^ — ^ ^.^ **j^wv.v^^.*^,^, iA.K.y^Kj^ Via V ioj-uxia, Wit; upper nmruwcr ana meieiy pin- 



nately cleft; heads numerous, in a narrow panicle; involucres glabrous or nearly 

 so, about 4 mm. broad; bracts oval, scarious-margined ; corollas brownish. A. 

 discolor mcompia A. Gray. Hillsides: Mont.— Colo.— Calif.— B.C. Jl-Au. 



^f] ^'J^}^^^^ ^' ^ ^•) Rydb. Perennial, with a creeping rootstock; stem 



5-10 



; beneath, acuminate, 5-10 cm. long, the lower pinnatifid, with 

 ■acuminate 



* 7 jj^ ^ 1 — --J -"^ v*^^i-rv.i KiiLx^rj, ux ciitiic, iit;£tua iiuiiieruus, in a pan- 



icle, nodding; involucres about 5 mm. broad, shining, nearly glabrous; bracts 

 "^^^^y^^^ovnah or brownish scarious margins, oval; corollas yellow or brownish. 

 A. Itlesti elatior T. & G. Valleys: Mack.— Hudson Bay—Mont —Wash — 

 Alaska, SubmonL—Suhalp, Jl-S. 



28. A. Leibergii Rydb. A suflFmtescent perennial, 3-6 dm. high, with a 

 woody caudex and short perennial stems; branches erect, simple, sparinely 

 tomentulose or glabrate, striate; leaves 3-6 cm. long, oblanceolate, coarsely 



