Crepis. COMPOSITE. 431 



narrow, 10-striate, the summit with a more or less dilated disk bearing the soft deciduous pap- 

 pus. Younyia, Ledeb., &c., not Cass. 



C. nana, RICHARDS. Forming depressed tufts on slender creeping rootstocks : leaves 

 diielly radical (iucli or two long, including petiole or attenuate base), obovate to spatulate, 

 entire, repand-dentate, or lyrate, commonly equalling the clustered scapes or stems : heads 

 in fruit half-inch high or nearly : akeues linear, unequally costate, obscurely contracted 

 under the moderately dilated pappiferoua disk. App. Fraukl. Journ. ed. 2, 92; Hook. 

 App. Parry Voy. 397," t. 1, & Fl. i. 297 ; Torr. & Gray, Fl. ii. 488. Hlerucium, etc., Gmel. Fl. 

 Sibir. ii. 20, t. 7. Prenanthes pygmaa, Ledeb. in Mem. Acad. Petrop. v. 553. P. polymor/iha, 

 Ledeb. Fl. Alt. iv. 144. Barkhausia nana, DC. Prodr. vii. 156. Yoitngia pyytmea, Ledeb. 

 Fl. Ross. ii. 838. Arctic coast aud islands, ami alpine mountain summits south to Colorado 

 and the Sierra Nevada in California. (X. Asia.) 



C. elegans, Hooic. Many-stemmed from a perennial tap-root, a span to a foot high, 

 diffusely branched : leaves entire or nearly so; radical spatulate, cauline from lanceolate to 

 linear: heads smaller or narrower than in the preceding: akenes linear-fusiform, miuutelv 

 scabrous on the equal narrow ribs, attenuate into a short slender beak, which is discoid 

 dilated at summit. Fl. i. 297 ; DC. Prodr. vii. 172 ; Torr. Gray, 1. c. Barkhausia elegans, 

 Nutt. Trans. Am. Phil. Soc. vii. 435. Saskatchewan district to Dakota and Montana; first 

 coll. by Drummond. 



+- -l More robust and taller, with scapiform or few-leaved stems and larger heads: akenes 

 thicker, not discoid-dilated at the insertion of the pappus. 



-H- No furfuraceous or canescent pubescence: foliage mostlj- glabrous: involucre campanulate, 

 many-flowered; its bracts lanceolate or linear, acute, Ihlle thickened below after flowering: 

 thick root possibly biennial, probably perennial: heads few or several and loosely corymbosely 

 cymose: pappus not remarkably copious. Crepidium, Nutt. 



C. glaiica, TOUR. & GRAY. Usually scapose, a foot or two high, glaucescent or glaucous : 

 radical leaves from obovate-spatulate to lanceolate, from entire to laciuiate-pinuatifid : invo- 

 lucre 4 lines high, glabrous or nearly so, as also the peduncles: akenes oblong, with slightly 

 narrowed summit, strongly and evenly 10-costate. Fl. ii. 488 ; Eaton, Bot. King Exp. 203 ; 

 Gray, Bot. Calif, i. 430. Crepidium ylaucum, Nutt. Trans. Am. Phil. Soc. vii. 43G. Moist 

 and saline ground, Saskatchewan and Nebraska, Utah and Nevada. Probably Arizona 

 (Rutlirock), but specimen too young and leafy, and peduncles sparingly hispidulous-glandu- 

 lar. Crepidium caulesccns, Nutt. 1. c., is probably a somewhat leafy-stemmed form. 



C. ruiicinata, TORR. & GRAY, 1. c. Not glaucous or slightly so, a foot or two high: radi- 

 cal leaves obovate-oblong to oblong-lanceolate, from repand to runcinate-pinnatifid with short 

 lobes or teeth; cauliue none, or small and narrow at the forks : involucre half-inch high or 

 smaller, pubescent, often hirsute, sometimes (with peduncles and upper part of scape) 

 glandular-hispidulous : akeues narrowly oblong, moderately narrowed upward, somewhat 

 evenly 10-costate. C. Unmis, var., Hook. Fl. i. 297, not L. C. bicnn/s, var. Americana, 

 DC. Prodr. vii. 1G3. Hieracium runcinatuin, James in Long Expcd. i. 453 ; Torr. in Ann. 

 Lye. N. Y. ii. 209. Crepidium runcinatuin, Nutt. I.e. Saskatchewan to Montana and 

 south to Colorado and Utah, in subalpine swamps; first coll. bv James. 



C. Anderson!, GRAY. Not glaucous, a foot or more high; leaves laciniately pinnatifid or 

 dentate, but not runcinate : involucre half to three-fourths inch high, cinereous-pubescent, of 

 broader and firmer bracts, more imbricated, outermost oblong- to ovate-lanceolate : akenes 

 fusiform, unequally S-10-costate, tapering into a short but manifest beak. Proc. Am. 

 Acad. vi. 553, & Bot. Calif, i. 436. Eastern Sierra Nevada, California and adjacent Nevada, 

 in low grounds : a form with a cauline leaf or two in uplands ; first coll. by Anderson. 



-H- -K- Furfuraceous- or cinereous-pubescent, at least the foliage, sometimes also hirsute, deep- 

 rooted perennials, more or less leafy-stemmed: akenes oblong to fusiform, beakless, 10-12-eos- 

 tate : pappus of very copious bristles, persistent: bracts of involucre at length with more or 

 less thickened or carinate midrib, at least the base: leaves usually laciniate-pinuatifid. Crtpis 

 Leptoiheca & Psilochenia, Nutt. Trans. Am. Phil. Soc. vii. 437, but false character of akenes 

 of the latter, and outer flowers not sterile. Species dillicult. 



= Principal bracts of the narrow involucre and flowers 5 to 8 : no hirsute pubescence: pappus 

 moderately copious and soft. 



C. acuminata, NCTT. 1. c. Minutely ciuereously-puberulent below, but green: stem slen- 

 der, 1 to 3 feet high, 1-3-leaved, bearing a fastigiate or corymbiform cyme of numerous 



