920 . C ARDU ACE AE 



32. A. campestns Rydb. Stem low, about 1 dm. high or less: leaves of 

 the rosettes obovate-cuneate, 2^ cm. long and about 1 cm. wide, glabrate above 

 tomentose beneath; stem-leaves small, linear, acute; heads 3-6, sessile, con- 

 glomerate; mvolucres of the pistillate heads 8-9 mm. high, outer bracts oblong 

 obtuse, the mner Imear-lanceolate, acute or acuminate; staminate involucres 6-7 

 mm. high; bracts elliptic or obovate, rounded. A. LuneUii and A. athabascensis 

 Greene. Prairies: Man.— Mich.— Mo.— Kang.—Sask.—(? B.C.). Plain. My- 



33. A. marginata Greene. Stem 1-2 dm. high; leaves spatulate or ob- 

 ianceolate, obtuse or mucronate, 1-2.5 cm. long, glabrate above, densely but 

 loosely white-tomentose beneath; heads 4^8, conglomerate, but short-pedicelled ; 

 involucres of the pistillate plant 8-10 mm. high; outer bracts oblong, obtuse, the 

 inner Imear-lanceolate, acute; involucres of staminate heads 6-7 mm. high; bracts 

 obovate or rhombic-obovate, obtuse, acutish or abruptly short-acuminate. Hills 

 ^r^r^ mountain sides: N.M.— s Colo.— Utah— Ariz. Submit.— Mont. Je-Jl 



1 ^*' ■^- rosulata Rydb. Plant almost acaulescent; stem 1 cm. long or less; 

 leaves of the rosettes 5-10 mm. long, spatulate or spatulate-obovate, densely 

 and closely silveiy-tomentose; heads 1-3 together, sessile; involucral bracts of 

 the pistillate heads lanceolate, acute, milky white, those of the staminate ones 

 oval or obovate, rounded. A. Bakeri Greene. Mountains: Colo.— Utah— Ariz. 

 Ciuhmont. — Mont My-Jl. 



35. A. Sieirae-Blancae Rydb. Rosulate, almost stcmless; leaves broadly 

 spatulate, less than 1 cm. long, abruptly acute; heads subsessile in the rosettes, 

 ^i mm. m diameter; bracts broadly oblong to ahnost obovate, with a scarious 

 brown upper portion. High mountains: s Colo. Alp. 



36. A. oblanceolata Rydb. Stem 2-4 dm. high, slender; basal leaves 3-6 

 cm. long, evidently 3-ribbed, densely white-tomentose; upper stem-leaves linear; 



S'r.'^'^Hf ^' "^yoj^^re? 4-5 mm. high; bracts brownish, with white or straw- 

 colored tips, those of the pistiUate heads oblong to linear, the outer obtuse, the 



m3 """^ n f T r J ^^'^ staminate heads oval and rounded. Mountain sides : 

 Mont.— Colo.— Cahf.— B.C. Suhmont .—M out. Je-Au. 



37. A. luzulqides T. & G. Stem 2-4 dm. high; leaves 5-7 cm. lone. 1-4 



4-5 



numerous 



shining 



those of the staminate heads broader, rounded and white-tipped. Valleys and 

 hUlsides: Mont.— Wyo.— Ore.— B.C. My-Jl. 



38. A. lanata (Hook.) Greene. Basal leaves narrowly oblanceolate, 4-8 cm. 

 long loosely white-tomentose; stem-leaves Unear; heads several, conglomerate; 

 mvolucres densely tomentose below, those of the pistillate heads 6-8 mm. high, 

 those of the staminate 5^ mm. high; bracts of the former in 5 or 6 series, dark 

 brown or ahnost black with light brown tips. High mountains : Alta.— Mont.— 

 Ure. — B.C. Mont. — Alp. Je-Au. 



39. A. pulcherrima (Hook.) Greene. Stem 3-5 dm. high; basal leaves 

 oblanceolate ^12 cm. long; stem-leaves narrower; heads several, corymbose; 

 mvolucres of the pistillate heads nearly 1 cm. high, more or less turbinate; bracts 

 in b or 7 series, the outer ^broadly ovate, obtusish, the inner narrowly lanceolate, 

 acuminate aU wrth dark brown bases and light bro^v-n or dirty white tips; stam- 

 mate mvolucres 5-€ mm high; bracts with rounded obovate tips. A. mrpatUca 

 S^t^SM '^^''^''^ ^""^ mountains: Sask.— Colo.— Wash.-Yukon. 



.«.*^" 1^" ,^^^P^H°H®<? ^^^^- , ^^"^ 3-4 dm. high, stout; basal leaves 

 narrowly oblanceolate. 10-15 cm. Ions, ftniif^- Tionrlo rr,„T„, \r. „J ^™k. 



3-1 



6-8 mm 



staminate heads rounded or truncate at the apex. A. pulcherrima c'oult. & 

 Mv^Au'''' ^''''''^' ^'^^''^''^- Mont.— Colo.— Ore.— B.C. Submont.—Subalp. 



