Flora of the Palonse Region 1S1 



300. CREPIS. 



Annuals or biennials with milky juice, not pilose: heads several- 

 many flowered: flowers yellow: involucre usually double: recep- 

 tacle flat, naked, sometimes alveolate: pappus simple, of copious 

 and white capillary bristles which are not plumose: corollas all 

 ligulate: akenes oblong, linear or fusiform, nearly terete or obtusely 

 angled, 10-20-ribbed, generally contracted at base and more taper- 

 ing at the apex, sometimes even beaked. 



Heads 5-10-flovvered. C. INTERMEDIA. 



Heads 25-30-flowered. C. occidentals. 



C. OCCidentalis Nutt. Perennial, erect, thinly white-tomentose through- 

 out, 8-30 cm. high: stems usually with few erect branches: leaves broadly 

 lanceolate, acute or acuminate, 5-10 cm. long, pinnately toothed or cleft into 

 narrow lobes, short-petioled or sessile: heads on stout peduncles: involucre 

 oblong-cylindric, 12-18 mm. long, tomentose and with a few large black 

 glandular hairs, the principal bracts lanceolate, acuminate, the smaller basal 

 bracts relatively broader: flowers 25-30: akenes brownish, fusiform, 8-10 

 mm. long, 10-18-ribbed, longer than the bright white pappus. In loose 

 rocks near Wawawai. 



C. intermedia Gray. Perennial, erect, thinly canescent or glabrate, 

 30-60 cm. high: leaves lanceolate, attenuate-acuminate, with few or numer- 

 ous slender teeth or lobes, or divided into narrow segments, rarely entire, 

 10-20 cm. long, the basal ones petioled: heads 5-10-flowered, loosely or 

 somewhat compactly corymbose: involucre oblong-cylindric, ashy-puberu- 

 lent, the principal bracts 5-9 in number, 10-12 mm. long, with a few small 

 ones at base: akenes acutely 10-ribbed when mature, oblong-fusiform, atten- 

 uate toward the apex, a little longer than the bright white soft pappus. 

 Rather common, very variable. 



301. HIERACIUM. 



Hispid and hirsute often glandular perennials with milky juice: 

 leaves merely toothed or entire: heads small to medium, panicu- 

 late or rarely solitary: flowers yellow or sometimes white: bracts 

 of involucre in two rows: receptacle flat, naked: pappus of a single 

 row of rough tawny bristles which are not plumose: corollas all 

 ligulate: akenes oblong or columnar, terete or 4 5-angled, mostly 

 10-ribbed or striate, the apex truncate. 



Plant covered with long soft hairs. H. SCOIT.ERI. 



Plant pubescent or glabrous. H. canadkn.sk. 



H. SCOUleri Hook. Perennial, erect. 30-60 cm. high, densely beset 

 throughout with long soft white hairs with swollen liases: basal leaves 

 lanceolate or oblanceolate, entire, acute or obtuse, 10-20 cm. long, tapering 

 into margined petioles; cauline similar, sessile, 5-12 cm, long: inflorescence 

 corymbose or paniculate, glandular: involucre 1 cm. high, very glandular 

 anil often villous: corollas yellow: akenes columnar: pappus fuscous. Com- 

 mon on hillsides. Very variable in the amount and length of the pub- 

 escence. 



