HIERACIUM COMPOSITAE 395 



and few- to many-flowered. Achenes in a few species slender or 

 tapering to the summit. Pappus of more or less scanty equal 

 bristles. 



* Crinite-hirsute with long and whitish or yellowish shaggy hairs, 

 especially on both sides of the entire leaves : flowers yellow : achenes 

 columnar and short, but not at all narrowed upward. 



H. longiberbe. Whole plant sparsely covered with long soft hairs : 

 stems usually slender and ascending or suberect, 6-18 inches long : leaves 

 lanceolate, entire or sparingly dentate, 3-6 inches long: heads rather few, 

 in an irregular panicle : involucre campanulate, 6 lines high, of 10-20 lan- 

 ceolate acuminate principal bracts with smaller calyculate ones at their 

 base, all densely clothed with long spreading hairs, not glandular. On 

 cliffs along the Columbia river near the Cascades. 



H. Scouleri Hook. Fl. i, 198. Sparingly pubescent with long crisp 

 hairs, pale and more or less glaucescent : stems 1-2 feet high, very leafy : 

 leaves lanceolate, sessile or the lowest short-petioled, 2-6 inches long: 

 heads rather few, in a loose irregular panicle : involucre 6 lines high ; its 

 bracts linear-lanceolate, often acuminate, imbricate in 2 or 3 series, the 

 outer successively shorter, all beset with long bristly hairs, and more or 

 less glandular : pappus whitish. Brit. Columbia to Oregon and Montana. 



* * Crinitely long-villous with soft-woolly and blackish smooth 

 hairs above, wanting below : without stellate or glandular pubescence : 

 flowers yellow : pappus fuscous. 



H. triste Cham, in herb. Willd. Stems simple, 4-12 inches high, few- 

 leaved, bearing solitary or 2-4 racemosely disposed small heads : radical 

 leaves obovate to spatulate, entire, green and glabrate, or with sparse 

 pale hairs ; cauline oblong, upper ones and stem more or less villous- 

 lanate : heads half-inch high, livid : involucre and peduncle densely clothed 

 with long dark-brown or partly grayish soft wool. Aleutian Islands to 

 northern Washington. 



* * * Dark-hirsute and somewhat glandular on the involucre : 

 leaves and lower part of stems glabrous, or at most pubescent : flow- 

 ers yellow. 



H. gracile Hook. Fl. i, 298. Pale green and more or less pubescent : 

 stems tufted, slender, 2-18 inches high : leaves mostly in radical cluster, 

 obovate to oblong-spatulate, 1-3 inches long, attenuate below to petioles, 

 entire or repand-dentate : heads few to several, racemously disposed, the 

 lower linear-bracteate : involucre about 4 lines high, its numerous linear 

 bracts all nearly equal, beset with short black somewhat hispid hairs 

 and also tomeritose and glandular : achenes short-columnar : pappus al- 

 most white. In open places on the highest peaks, Alaska to California 

 and the Rocky Mountains. 



* * * * Not crinite but at least the radical leaves and base of the 

 stem sparsely or even thickly setose-hirsute with spreading hairs. 



■^ Flowers white : stems leafy, and in large plants loosely branching. 

 H. albiflorum Hook. 1. c. Stems slender, 1-3 feet high, bearing few 

 to numerous small heads in an open, simple or compound paniculate 

 cyme : leaves oblong to broadly lanceolate, thin, 1-4 inches long ; the 

 upper sessile by a broad base, the lower tapering into slender petioles : 

 involucre campanulate, 4-5 lines high, of several linear-lanceolate acute 

 bracts, imbricated in 2 or 3 ranks, the outer successively shorter, glabrous 

 or nearly so, not rarely with a few bristly hairs: achenes black, a line 

 long. Common in dry wooded districts, Alaska to California and the 

 Rocky Mountains. 



