144 BOTAST. 



hemispherical involucre linear-lanceolate, acute, nearly herbaceous, sub-equal, 

 loosely imbricated in 2-3 series ; rays purplish ; style of the disk-flowers 

 with filiform branches, the hispid portion 3-4 times longer than the stigmatic; 

 achenia oblong', villous, 4-6-costate ; pappus of nearly equal barbellate setae. — 

 Near Carson City, Nevada, (Dr. C. L. Anderson.) California, (Prof Brewer 

 and Mr. Bolander.) Involucre 6-9" wide ; the heads 15-18" in diameter. 



Aster elegans, T. & Gr. Stems several from a sbort creeping rootstock, 

 1-2 J° high, very leafy ; leaves sessile, the lower ones scale-like and soon 

 withering, the others lanceolate, 1-2J' long, 4-9" wide, entire, minutely 

 puberulent like the stem, and roughened, obscurely 3-nerved or somewhat 

 ffeather-veined ; inflorescence corymbose ; heads peduncled ; involucres 

 turbinate-campanulate, 4-6" wide, the scales ovate or oblong, acute, puberu- 

 lent, the scarious margins densely lacerate-fiinged ; rays few; (6-10,) dull 

 pinkish. — Oregon to Wyoming. Mountains of the East Humboldt range, 

 and at the head of Humboldt River, Nevada, and in the Wahsatch ; 7-9,000 

 feet altitude ; August, September. (514.) 



Var. Engelmanni. (A. Engehnanni, Grray, in Sill. Journal, n. s., 33. 9.) 

 Larger in every way, the leaves 2J-3' long, often an inch wide; involucres 

 7-10" wide, and the rays 12-18 in number. This passes by insensible 

 degrees into the typical form. Cascade Mountains, latitude 49°, (Lyall,) to 

 Colorado. East Humboldt and Clover Mountains, Nevada,-Wabsatch and 

 Uintas ; 7-10,000 feet altitude ; July-September. (515.) 



Aster glaucus, T. & Gr. Stems leafy, erect, 1-14° high, from a slender 

 creeping rootstock ; lowest leaves squamiform ; the others oblong-linear, 2-3' 

 long, 4-6" wide, sessile, pointed, smooth and glaucojis, one-nerved, veins 

 prominently reticulated ; heads corymbose ; involucre campanulate, the scales 

 loosely imbricated in 3 or 4 series, lacerate-fringed, outer ones oval, herbace- 

 ous, inner ones lanceolate, membranous, acute, purple-tinged; rays 14-17, 

 pinkish- white ; achenia smooth, or slightly pubescent. — One of the most 

 distinct and elegant of the genus. Heads when fully expanded 15" broad. 

 Wyoming and Colorado. Echo Canon, in the Wahsatch, and Bear River 

 Canon, Uintas; 6-8,000 feet elevation; July, August. (516.) 



Aster angustus, T. & G. Annual or biennial, 6-20' high, branching 

 from the base ; branches panicled ; leaves linear or linear-spatulate, smooth 

 and somewhat fleshy, entire, 2-3' long, heads everywhere, crowded ; involu- 

 cres 4-6" wide, ovate-hemispherical ; the scales loosely imbricated in 2 or 3 



