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; 
ote all broad ovate, acuminate, in about three series; segments of the pap- 
pus ovate, the awn scarcely scabrous. Hymenonema? laciniatum, Hoox. Flor. 
Bor. Am., Vol. L., p. 301. | 
Has. 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 
pa yellow; sepals very much acuminated. Achenium light brown, a little scabrous towards 
the summit. Root tap-shaped, nearly like that of Salsafy. 
_ Scorzonella * ; leaves, as in the preceding, sient divided; in- 
volucrum with the sepals j in two series, the outer about five-leaved, ovate; the 
inner pea lanceolate, acuminate; segments of the pappus a 
ate, with scabrous awns; achenium wholly smooth. 
His. With the above, and scarcely distinguishable from it, exeept by the ete, 
ep 
*) 
" Scorzonell glauca. Hymenonema? glaucum, Hoox. Flor. Bor. Ait Vol. L., 
p. 300. With this plant I am unacquainted. 
