886 _ CARDUACEAE 



+ 



34. A. brevibracteatus Rydb. Stem 5-6 dm. high, glabrous, tinged with 

 purple; basal leaves about 1 dm. long, with short winged petioles; blades spatu- 

 late or oblanceolate, crenate-serrate, glabrous; upper stem-leaves lanceolate, 

 half clasping; involucre 5-7 mm. high, nearly 1 cm. broad; bracts linear-lanceo- 

 late, firm, with a narrowly rhomboid green tip; ligules blue, 8 mm. long. Low 

 groimd: Wash. — Mont. Submont. Au-S. 



35. A. laevis L. Stem 3-12 dm. high, rigid, glabrous, glaucous; basal leaves 

 with wmged petioles; blades ovate or lanceolate, more or less serrate, glabrous 

 and glaucous; upper stem-leaves ovate, subcordate or auriculate-clasping; invo- 

 lucres 8-9 mm. high, about 1 cm. broad; ligules blue. Open woodlands: Ont.— 

 La.— N.M.— B.C. Plain— Mont. Au-0. 



36. A. Geyeri (A. Gray) Howell. Stem 5-10 dm. high, glabrous; lower 

 leaves 1-2 dm. long, with winged petioles; blades oblanceolate, entire or sparingly 

 serrate, glabrous, glaucous; involucres about 8 mm. high and 1 cm. wide- ligules 

 blue, 8-10 mm. long; achenes glabrous. Valleys: Alta.—S.D.— Colo.— Wash. 

 Submont. — Mont. Jl-S. 



. ^ 37. A. subsalignus Rydb. Stem &-10 dm. high; leaves nearly erect, gla- 

 brous, glaucous, entire, clasping, 5-10 cm. long, 6-7 mm. wide; involucres about 

 7 mm. high and 8 mm. wide; ligules bluish or bluish purple, about 8 mm. long; 

 disk-flowers dark, red-purple. Valleys : Colo. Submont. Au. 



38. A. Scribneri Rydb. Stem 3-6 dm. high, glabrous; basal leaves 1-2 dm. 

 long, with wmg-margmed petioles; blades thin, ovate, acute, sharply serrate- 

 dentate, glaucous, glabrous; stem-leaves ovate or ovate-lanceolate, sessile and 

 clasping; panicle small, with 5-10 heads; bracts glabrous; ligules about 8 mm. 

 long. Valleys: Mont. Submont. Au. 



39. A. Porteri A. Gray. Stems 2-4 dm. high, glabrous, simple or branched 

 above; leaves linear, or the lower oblanceolate, 5-10 cm. long, divergent, glabrous, 

 or the lower hirsute-ciliate; heads numerous; involucres 4-5 mm. high 6-7 mm' 

 broad; ligules white, 5-6 mm. long. Mountains: Colo. Submont.— Mont. Jl-o! 



40. A. subracemosus Rydb.- Stem 5-6 dm. high, simple, strict, sparingly 

 stngose; leaves oblanceolate or the upper linear, sessile, 4r-8 cm. long more or 

 less scabrous, scabrous-ciliate on the margins, entire; involucres about 8 mm 

 high and 1 cm. broad; bracts in 3-4 series, with oblanceolate green tips. Rocky 

 hillsides: Mont. Submont. S. <= i- j 



41. A. salicifolius Lam. Stem 5-20 dm. high, paniculately branched; 

 leaves lanceolate, farm, glabrous or scabrous, 6-10 cm. long, the lower more or 

 less dentate; involucres 6-8 mm. high, 8-10 mm. broad; bracts with narrowlv 

 oblanceolate green tips or the outer nearly wholly green; ligules purple or violet, 

 rarely w-hite, 6-8 mm long. Wooded banks: Me.— Fla.— Tex.— Colo.— B c! 

 Jrlam — S ubmont. Au-O . 



42. A. paniculatus Lam. Stem 5-20 dm. high, paniculately branched; 

 leaves oblong-lanc^eolate to narrowly Imear-lanceolate, mostly attenuate, thin! 



5-6 



pink 



gul 



rareiy pioK^ or pale lilac, 7-8 mm. long. Wooded banks: N.B.— Va.— Colo.— 

 oasK. flam — ^ ubmont. Au-O. 



l^^.^c'if; ^^^P«"^s A- Gray. Stem 4-10 dm. high, paniculately branched; 

 l?Jrf If "^.^.-linear entire or rarely denticulate, 5-15 cm. long, thin, glabrous o; 

 nearly so, hispid-ciliolate on the margins; involucres 7-8 mm high, nearly 1 cm. 

 broad; ouer bracts green, the inner ones with narrowly lanceolate green tips "f 

 the same length or the Puter slightly shorter; ligules Violet or white 7-8 mm 

 long. Along streams: N.M.-Colo.-Calif.; n Mex. Son Au-O. 



u«.**' 1^" fi"'^**^^s Osterh. Stem slender, 6-10 dm. high, leafy and branched; 

 nSv i^^.^-'^^^^'-' ^^^^^1^' .somewhat clasping, the larger 1 dmf long, entire o^ 

 near y so mflorescence paniculate; involucres 6-7 mm. high, nearly 1 cm. broad; 

 bracts m 4 series, oblanceolate, acute, with oblanceolate green tips- ligules Ulac 



