crepis COMPOSITE 397 



below to short petioles, or the cauline sessile, villous-crinite and tomen- 

 tose-canescent both sides : heads rather numerous, in an open panicle few- 

 flowered : involucre about 5 lines high cylindrical of 6-8 linear-lanceolate 

 obtuse principal bracts and a few shorter ones at their base, all hoary with 

 close stellular pubescence, without any setose bristles: pappus white when 

 young. Open Rocky ridges, Mooney Mountain, Josephine county, Oregon. 



106 CREPIS L. Gen. n. 9. 14, 



Perennial or annual herbs with alternate or all radical mostly 

 toothed or pinnatifid leaves and small or middle-sized heads of 

 yellow flowers. Involucre few- to many-flowered, cylindric, cam- 

 panulate, or swollen at base, its principal bracts in one series, 

 equal, with a number of exterior smaller ones. Receptacle mostly 

 flat, naked or short-fimbrillate. Achenes from columnar to fusi- 

 form, 10-20-ribbed or nerved, not transversely rugose, narrowed 

 at the base and apex. Pappus of copious w T hite and usually soft 

 capillary bristles. 



* Bracts of the involucre thickening and becoming more or less 

 rigid at base in age : achenes beakless or nearly so. 



C. virens L. Sp. ed. 2, 1134. Glabrous annual; stems leafy 1-2 feet 

 high corymbosely branched above: radical leaves spatulate to lanceolate, 

 from dentate to laciniate pinnatifid, 2-8 inches long, narrowed below to 

 petioles : cauline smaller and narrower, clasping by a sagittate base the 

 upper usually very small and entire : heads numerous, slender-peduncled : 

 involucre 4-5 lines high, oblong, more or less pubescent or glandular, its 

 principal bracts lanceolate, the outer mostly appressed achenes oblong, 

 10-striate, smooth slightly contracted at both ends. In fields and waste 

 places, British Columbia to California. Naturalized from Europe. 



* * Perennials: achenes beakless or short-beaked. 



C. naua Richards, App. Franklin Journ. ed. 2, 62. Glaucescent and 

 wholly glabrous : low and depressed, forming tufts and bearing numerous 

 clustered and narrow short peduncled heads: leaves chiefly radical, ob- 

 ovate to spatulate, entire, repand-dentate or lyrate, commonly equalling 

 the clustered scapes or stems : involucre cylindrical 8-14 flowered, of 8-10 

 smooth and narrowly linear obtuse bracts in a single series and 3 or 4 short 

 calyculate ones at base : achenes linear, unequally costate, obscurely con- 

 tracted under the moderately dilate i pappiferous disk. Alaska to the 

 Wallowa Mountains of Oregon and to California. 



C. runcinata T. & G. Fl. ii, 438. Slightly if at all glaucous: stems 

 scape-like, 1-3 feet high, paniculately branched above: radical leaves ob- 

 ovate-oblong to oblong-lanceolate, 2-^6 inches long, from repand-dentate to 

 runcnate-pinnatifid, with short lobes or teeth; cauline none or small and 

 narrow at the forks : involucre half-inch high or less, pubescent, often hir- 

 sute, sometimes glandular-hispidulous : achenes narrowly oblong, moder- 

 ately narrowed upward, somewhat evenly 10-costate. In moist soil, south- 

 eastern Oregon to Manitoba and Iowa. 



Var. hispidnlosa. whole plant hispidulous and glandular. Moist 

 places, southeastern Oregon. 



C. Andersoni Gray Proc. Am. Acad, vi, 436. u Xot glaucous, afoot 

 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 : 

 achenes fusiform, usually 8-10-costate, tapering into a short but manifest 

 beak. " Eastern Oregon to Nevada and eastern California. 



