436 COMPOSITE. Crepis. 



2. C. acuminata, Nutt. Less tomentose : stem slender, 1 to 3 feet high, 

 bearing an open cyme of numerous and slender-peduncled narrow heads : leaves 

 runcinately pinnatiiid into lanceolate or linear lobes below, and the apex prolonged 

 into an entire tail-like acumination : involucre 5 - 15-flowered, either tomentulose 

 or glabrous, narrow-cylindrical, 5 to 7 lines high ; the'principal scales 5 to 8 : akenes 

 10-striate, with a tapering summit. Torr. in Stansbury Rep. 392, t. 8 (the akene 

 too tapering at summit). C. occidentals, var. gracilis, Eaton in Bot. King Exp. 203, 

 slender forms. 



Dry ground, from near Clear Lake (Newberry, Torrey, &c.) and Yosemite and Sierra Valleys 

 (Bolander, &c.), to Oregon and the Rocky Mountains. Akenes generally rather longer than 

 the pappus. 



* * Glabrous or slightly hairy : stems or mostly naked scapes and a crown of radical 

 leaves from a solitary and thick probably biennial root, bearing a few long-pedunded 

 heads. 



3. C. glauca, Torr. & Gray. Glabrous, except a slight pubescence on the young 

 heads : leaves all radical, glaucous, oblong or oblanceolate, runcinate-pinnatifid or 

 denticulate, thickish, hardly petioled : heads small: involucre 15 20-flowered, of 

 about 1 2 narrow and equal scales and 3 or 4 small accessory ones : akenes oblong, 

 incurved, slightly narrowed at both ends, 10-ribbed, shorter than the rather scanty 

 deciduous pappus. Crepidium glaucum, Nutt. 1. c. 



Low grounds in saline soil, Western Nevada ( Watson) to the Platte : not yet found on the 

 borders of California, but it may be expected. Involucre 3 to 5 lines long. Akenes only 2 

 lines long. 



4. C. Andersonii, Gray. Glabrous, or with some woolly pubescence when young : 

 leaves mainly radical, oblong-obovate or lanceolate, laciniately-toothed or rarely run- 

 cinate-pinnatifid, nearly sessile : heads rather large : involucre many-flowered, mostly 

 glandular-pubescent when young; the scales imbricated in about 3 series, linear- 

 lanceolate or oblong-linear : akenes fusiform, many-striate, smooth, tapering gradu- 

 ally into a short but rather distinct beak. Proc. Am. Acad. vi. 553 ; Eaton in 

 Bot. King Exp. 203. 



Low grounds, near Carson City (Anderson), and a caulescent form in uplands (which may be 

 Crepidium caulescens, Nutt.), and Sierra Valley (Lemmori) : extending into Nevada, Watson. 

 Heads half to two thirds of an inch long. Akenes 3 lines long, including the beak : pappus 

 rather deciduous. 



CREPIS RUNCINATA, Torr. & Gray, is most like C. glauca ; but has a hispidly glandular and 

 pubescent involucre, narrower akenes, and the thinner leaves not glaucous. It belongs to the 

 Rocky Mountain district, and probably does not approach California. 



C. COOPERI, Gray, is the Malacothrix crepoides. Gray in Pacif. R. Rep. xii. 49, a small-flowered 

 species with the aspect of Mnlacothrix obtusa, but not the characters of that genus. It is in E. 

 Hall's collection from near Portland, Oregon, and may perhaps be expected in the northern part 

 of California. 



* * * Glabrous or nearly so, dwarf, perennial : heads from the crown among the 



radical leaves, or on scapes hardly exceeding them. 



5. C. nana, Eichardson. Leaves in a depressed cluster, rather glaucous, oblong 

 or spatulate and lyrate or lyrately toothed, or sometimes roundish and small, the 

 lateral divisions being wanting, commonly long-petioled : heads clustered at the 

 crown, or several on a scape or stem an inch or two high : involucre cylindraceous, 

 10- 14-flowered, of 6 to 8 linear obtuse glabrous scales, and a few short calyculate 

 ones at base : flowers yellow turning pink : akenes slender, linear and obscurely 

 fusiform, not beaked, finely striate. Hook, in Parry's 2d Voy. 397, t. 1; Torr. 

 & Gray, 1. c. 



High Sierra Nevada, at Sonora Pass (a single and somewhat ambiguous specimen), Brewer. 

 Also in the northern Rocky Mountains, extending to the Arctic coast, and in Siberia. The nar- 

 row heads nearly half an inch long. 



