THISTLE FAMILY 889 



hispidulous-ciliolate margins, deflexed, firm; leaves of the floral branches less than 

 1 cm. long, spreading and laecoming bract-like above; involucre turbinate, 7-8 

 mm. wide; bracts imbricate, coriaceous below, with green obovate or spatulate 

 green tips, the outer roimded at the apex; ligules pale, 5 mm. long. Salt marshes: 

 Utah. Son. S. 



67. A. Hallii A. Gray. Stem strict, 2-5 dm. high; lower leaves linear, the 

 upper linear-oblong, 2-5 cm. long, those of the branches much smaller, all entire; 

 involucres 3-4 mm. high, 4-7 mm. broad; bracts imbricate, rather thick, spatu- 

 late or oblanceolate, rounded and callous, mucronate at the apex; ligules 4-6 mm. 

 long, white or whitish. Dry places: Wash. — Mont. — Ore. Suhmont. — Mont. S. 



68. A. proximus Greene. Stem 4-6 dm. high, glabrous below, sparingly 

 pubescent above; leaves linear-lanceolate or lanceolate, entire, sessile, 5-10 cm. 

 long, smooth beneath, scabrous above, light green, spreading; disk about 9 mm. 

 high, 10-15 mm. broad; outer bracts obtuse, mucronate; ligules flesh-colored or 

 rose, 8-10 mm. long. River banks: Wyo. — Mont. Suhmont. — Mont. Au-S. 



69. A. phyllodes Rydb. Stem 5-10 dm. high, leafy, glabrous below, pubes- 

 cent in lines above; leaves thin, the lower usually more or less serrate, with small 

 distant teeth, all glabrous on both sides, auriculate-clasping ; disk 8 mm. high, 

 about 12 mm. broad; outer bracts oblanceolate, acute, foliaceous, usually slightly 

 exceeding the disk; rays violet, 8-10 mm. long. Meadows: w Neb. — e Colo. 

 Plain. Au. 



70. A. Mearnsii Rydb. Stem 3-10 dm. high, leafy, branched, glabrous 

 below, sparingly pubescent above; leaves 5-10 cm. long, ascending-spreading, 

 sessile, entire, glabrous beneath, scabrous or glabrate above; disk about 8 mm. 

 high and barely 1 cm. broad; bracts oblanceolate, acute, some longer than the 

 disk; ligules about 8 mm. long, white or pinkish. River banks: Sask. — Wyo. — 

 Ida. — B.C. Suhmont. — Mont. Jl-0. 



71. A. Douglasii Lindl. Stem 4-10 dm. high, glabrous and shining below, 

 pilose above; leaves linear-lanceolate or hnear, 5-15 cm. long, glabrous or nearly 

 so; involucres 8-10 mm. high, about 15 mm. wide; bracts linear, acute or acumi- 

 nate, with often squarrose tips, the outer scarcely longer than the inner; ligules 

 light blue, 10-12 mm. long. Moist places: Mont.— Wyo.— n Cahf.— B.C. Svh- 

 mont. Au-S. 



72. A. fulcratUS Greene. Stem decumbent at the base, red-purple, more or 

 less puberulent, 3-4 dm. high; leaves hnear, 5-10 cm. long, entire, glabrous, sca- 

 brous-ciholate; disk about 1 cm. high and broad; bracts in about 2 series, mostly 

 green, the outer foliaceous, linear, 1-2 cm. long; ligules about 1 cm. long, rose- 

 purple or rose-lilac. Valleys: Colo. Mont. Jl. 



73. A. cordalenus Henders. Stem erect, 2-3 dm. high, pubescent above; 

 leaves 5-8 cm. long, 5-10 mm. wide, entire or with a few distant serratures, 

 strongly cihate; disk 5-7 mm. high and 7-10 mm. broad; outer bracts hnear, 1-2 

 cm. long, green, the inner with white margins and foliaceous tips; ligules blue 

 or violet, 8-10 mm. long. Moist river bars: Ida. Suhmont. Au. 



74. A. Eatonii (A. Gray) Howell. Stem 3-10 dm. high, glabrous; leaves 

 narrowly linear or lance-linear, sessile, thin, entire; involucre about 7 mm. high, 

 7-10 mm. broad; bracts glabrous, linear or lance-linear, acute; ligules 7-10 mm. 

 long, lavender, rose, or whitish. Brachyactis hyhrida Greene. Moimtains: Mont. 

 — Colo. — Nev. — B.C. Suhmont. 



75. A. Hendersonii Fernald. Stem .5-10 dm. high, villous especially above, 

 branched above; leaves thin, cihate on the margins, more or less short-hairy or 

 in age glabrate; stem-leaves linear-lanceolate, 5-8 cm. long, the lower ones 1-1.5 

 cm. long, narrowed below, with clasping bases; involucres turbinate, 10-15 mm. 

 broad; bracts linear, subulate, foUaceous, ciliate on the margins; Ugules blue, 

 12-16 mm. long. Rich meadows: Ida. Suhmont. Jl-Au. 



76. A. oreganus Nutt. Stem slender, branched, 3-6 dm. high, more or less 

 pubescent; branches strongly ascending; leaves linear or lance-linear, 5-8 cm. 

 long, entire, 6-8 mm. high, 7-8 mm. broad; bracts lanceolate or lance-linear, 

 the outer about equalling the inner ones; hgules purphsh or white, 7-8 mm. long. 



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