426 DESCRIPTIONS OF NEW SPECIES 



*SCORZONELLA. 



Capitulum many-flowered. Involucrum ovate, imbricate, the sepals acumi- 

 nate, the outer, or those of all the series ovate, the margins membranaceous. 

 Receptacle naked, alveolate. Achenium not rostrate, quadrangular, strongly 

 and obtusely ten-ribbed. Pappus paleaceous, five to ten parted, united at 

 base into a rigid cup, the segments short ovate, terminating in very long, 

 slender awns. Style exserted, slender, filiform, the branches of the stigma 

 rather short. — Perennial herbs of Oregon, with fusiform, tuberous roots, and 

 sheathing, slenderly pinnatifid, smooth leaves; pedicels very long, naked and 

 scapoid. Flowers yellow, the liguli longer than the involucrum, the apex 

 five-toothed. (The name alludes to the general aspect of Scorzonera.) Al- 

 lied, though somewhat remotely, to Calais, from which they differ wholly in 

 habit and duration, having large, conspicuous flowers, like those of Scorzo- 

 nera; the achenium is also truncate and strongly angular. 



Scorzonella laciniata; leaves deeply pinnatifid, with entire, narrow segments; 

 sepals all broad ovate, acuminate, in about three series; segments of the pap- 

 pus ovate, the awn scarcely scabrous. Hymenonema? laciniatum, Hook. Flor. 

 Bor. Am., Vol. I., p. 301. 



Hab. On the plains of the Oregon, near the outlet of the Wahlamet. Twelve to sixteen inches 

 high; the pedicel often eight inches to a foot long, a little enlarged beneath the involucrum. Stem 

 bearing one to three or more flowers. Segments of the leaves often as slender as threads, and 

 very long. Florets very numerous, nearly as much so as in the common Dandelion, of a bright 

 sulphur yellow; sepals very much acuminated. Achenium light brown, a little scabrous towards 

 the summit. Root tap-shaped, nearly like that of Salsafy. 



Scorzonella *leptosepala; leaves, as in the preceding, slenderly divided; in- 

 volucrum with the sepals in two series, the outer about five-leaved, ovate; the 

 inner eight-leaved, lanceolate, acuminate; segments of the pappus oblong-lan- 

 ceolate, with scabrous awns; achenium wholly smooth. 



Hab. With the above, and scarcely distinguishable from it, except by the involucrum. 



Scorzonella glauca. Hymenonema? glaucum, Hook. Flor. Bor. Am., Vol. I,, 

 p. 300. With, this plant I am unacquainted. 



