Flora of the Palouse Region 



Leaves ternatel}- dissected into linear lobes. E. compositus. 



Leaves entire or nearly so. 



Tall perennials, sparingly hirsute. R. SPECIOSUS. 



Low perennials. 



Leaves harshly pubescent. E. CORYMBOSUS. 



Leaves softly long-hairy. K. CONCINNUS. 



Tall annuals or biennials. 



Pappus brownish, copious. E. acris. 



Pappus white, sparse. 



Ray-flowers about ioo, their pappus like that of the disk-flowers. 



E. DIVERGENS. 

 Ray-flowers fewer, their pappus very short, scant or wanting. 



E. STRIGOSUS. 



E. COmpOSituS Pursh. Perennial, tufted from a woody crown: leaves hir- 

 sute or glabrous; basal leaves long-petioled, the blade 1-3-times ternately 

 divided into linear obtuse lobes, 4-10 mm. long; cauline sessile, mostly linear 

 and entire: flowering stems 6-15 cm. high, bearing solitary heads: involucre 

 sparsely hairy, 6-8 mm. high: rays 30-50, pink or white, 6-10 mm. long: 

 akenes short-pubescent: pappus simple. Rocky banks of Snake River. Or- 

 iginally found by Lewis and Clark on the banks of the Clearwater. 



E. speciOSUS DC. Perennial, tufted, sparingly hirsute or nearly glabrous: 

 stems 30-50 cm. high, leafy to the top, erect: leaves lanceolate, rarely linear, 

 entire, acute or acuminate, usually ciliate at least at the base: the 

 upper cauline sessile by a broad base; the lower and radical petioled, 5-15 

 cm. long: heads few, in a loose corymb: involucre hirsute or nearly glabrous, 

 5-6 mm. high: rays about 100, narrow, violet, about 1 cm. long: akenes 

 pubescent: pappus double, the outer bristles very short. Gravelly soil along 

 the Palouse from Guy to below Colfax. 



E. COrymbOSUS Nutt. Perennial, tufted, erect or decumbent, 15-50 cm. 

 high, harshly pubescent throughout: radical leaveslinear, spatulate, 3-nerved, 

 6-15 cm. long: cauline linear, i-nerved, acuminate, sessile, gradually smaller 

 to the top: heads slender-peduncled, sometimes solitary, mostly in loose 

 corymbs: involucre 7-8 mm. high, whitish, hirsute: rays 30-50, violet, rarely 

 white, 6-12 mm. long: pappus double, the outer bristles very short, some- 

 times wanting. Common on the hills. 



E- COncinnus Torr. & Gray. Perennial, erect, commonly tufted from a 

 stout crown, 10-30 cm. high, very pubescent, with long and soft hairs: leaves 

 spatulate-linear, entire, 2-8 cm. long, nearly erect: heads loosely corymbed: 

 involucre hirsute, 5 mm. high: rays white, pink or violet, numerous, 5-6 

 mm. long: pappus double, the outer short but conspicuous. Dry ground, 

 very rare in our limits. 



E. acris L. Biennial, erect, glabrous or sparsely pubescent, 30-60 cm. 

 high: basal leaves spatulate-lanceolate; cauline lanceolate, sessile, all entire, 

 acute or obtuse, 5-10 cm. long: heads paniculate or corymbose, 6-8 mm. 

 broad: involucre puberulent and somewhat hirsute: rays very narrow, pink- 

 ish, equalling the disk, within them a series of tubular filiform pistillate 

 flowers: akenes smooth: pappus copious, brownish. Open woods, Thatuna 

 Hills. 



E. divergens Torr. & Gray. Annual, usually tufted and branched, soft- 

 hirsute throughout, leafy to the top: lower leaves spatulate, obtuse, 2-8 cm. 

 long; upper cauline lanceolate, sessile, smaller, all entire or sometimes 



