414 DESCRIPTIONS OF NEW SPECIES 
inches high, somewhat angular. Nearly allied to S. coronopifolius: may it not be a variety of that 
plant introduced by accident? It is not, however, glaucous. . 
Senecio * filifolius; 2, stem leaty, striated, and, as well as the leaves, arach- - 
noidly tomentose; leaves pseudopinnate, sessile, segments linear, almost fili- 
form, about two pair, the margin revolute; corymb few-flowered; involucrum 
smooth, minutely bracteolate, subcampanulate; the sepals obtusely carinate, 
acuminate, about twenty; rays few and revolute; ie ots hirsute, pappus 
copious, as long, or longer than the florets. : 
Has. The banks of the Missouri, towards the Rocky Mountains. With much the aspect of 
some of the species from the Cape of Good Hope. Leaves a good deal like those of 8. abrotanifolius, 
‘but whitely tomentose, and divided into a very few simple besa about an inch long, and a 
quarter of a line wide. (I have seen but a single = speci 
_ CROCIDIUM. (Hooker. ) 
Capitalam cat radiate ; : apys feminine, in a single series, (eight to 
twelve.) Involucrum in one series, subimbricate, eight it to twelve-parted, 
the divisions ovate, somewhat spreading, at length reamed, the margins of 
the inner series membranaceous. Receptacle conic, elevatec 
ed, naked, mi- 
nutely: papillose. Branches of the stigma very short, lanceolate e, acuminate, 
slightly pubescent, not exserted, in the ray very short. Achenium subey- 
lindric, pentagonal, the intervals of the ridges densely squamellose at the 
summit, appearing almost like an external pappus. Pappus deciduous, bar- 
bellate, almost plumose, very white, and little more than the length of the 
_ achenium; the radial achenia wholly similar, (not compressed,) but without 
pappus.—A_ remarkably distinct genus, approaching more to the ANTHE- 
“MIpE# than the present group, but, in fact, a new type, and a = in 
each of the present orders. 
Has. On the shelving rocks of the Oregon, at the confluence of the Wahlamet; common. A 
y elegant but fugacious annual, six to eight inches high, sending‘up numerous.simple branches 
the base, each terminating in a single clear yellow flower. 
Radical leaves spathulate, incisely 
‘indented, the abide small, linear, acuminate or subulate, sessile; pedicel very long, naked. 
ails of the feaves floccosely lanuginous. Involucrurh smooth and greenish. Rays oblong, nearly 
entire, twice as long as the involucrum. All parts of the capitulum, except the persisting invo- 
luerum, caducous. Border of the discal florets campanulate, deeply five-cleft, the divisions linear- 
