436 COMPOSITE. Crepis. 



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

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

 runcinately pinnatilld 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 Eep. 392, t. 8 (the akene 

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

 slender forms. 



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

 (Bolandcr, kc), to Oregon and the Eocky Mountains. Akenes generally rather longer than 

 the pappus. 



•V: % Glahroiis or slightly hairy : stems or mostly nalced scapes and a croivn of radical 

 leaves from a solitary and tJdch prohahly hiennicd root, bearing a few long-peduncled 

 heads. 



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

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

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

 about 12 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 glaucuvi, 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 exijeeted. 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 ijito 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 {Leinmon) : extending into Nevada, M'ahon. 

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

 rather deciduous. 



Crepis rxincinata, 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 

 Kocky Mountain district, and j)robably does not appi'oach California. 



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

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

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

 of California. 



'k * * Glabrotcs or nearly so, dwarf, p)erennial : heads from the crown among the 

 radiccd 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 IMountains, extending to the Arctic coast, and in Siberia. The nar- 

 row heads nearly half an inch long. 



