340 DESCRIPTIONS OF NEW SPECIES 
* PSILOCARPHUS. 
Capit Peaydiowered: heterogamous; flowers all tubular; rays in several se» 
‘ries, filiform, etemns: discal florets hermaphrodite, sterile, about five. In- 
volucrum none, or mere foliaceous, irregular bractes. Receptacle convex, 
elevated, bracteolate, except the centre, bractes gibbous, subcylindric, reti- 
culately membranaceous, folded inwards over the female florets and achenia. 
Achenium cylindric-oblong, smooth and shining, loosely infolded and decidu- 
ous wit the bracteoles.—Dwarf stat of abe ee America, with 
the whole “aspect of Micropus, diffusely branched, and canescently tomen- 
tose; flowers glomerate, lateral end minal. —(The name from Ao, slen- 
der, and xapoos, chaff. In — to the membranous bracteal scales. ) 
Piitichiphiis * globiferus; Gaisicisn Cy tomentose, beneath more densely ; 
prostrate and diffusely branched, leaves oblong-linear, the floral ones broader, 
obtuse; capituli lateral and terminal; female florets twenty-five to twenty-eight; 
nace five to eight; scales of the receptacle gibbous, rostrate, involute.— 
DU globiferus? Decanp. and Bertero, Vol. N., p. 460. 
as. Round St. Barbara, Upper C nia. Flowering in April. Not an inch high, spread- ° 
ing out five or six inches, beneath covered ¥ 
tha long, soft, white wool, above less densely canes- 
f the receptacle naked, convex ae masculine florets very minute. Fruc- 
tiferous scales reticulately Se not in the least Baia, subeylindric, gibbous, with a 
short rostrum. 
Psilocarphus *brevissimus; canescently and very softly tomentose; stem 
minute and very dwarf, producing mostly a single capitulum; leaves oblong- 
lanceolate, acute; female florets about. eight; fructiferous scale ovate-oblong, 
without beak; achenium almost lin ar.—Micropus minimus? Decanp., Vol. V., 
p- 461. ; me 
Has. Plains of the Oregon River, in inundated tracts. Extremely dwarf, ‘cena not Siways 
80+) About four lines high, the solitary capitulum, though rather large, sessile on about the third 
ee and so downy as to look like a pellet ‘of cotton, the fruit-bearing scale nearly quite 
cely gibbous, larger than usual; the achenium narrow, but longer than in the pre- 
which it, in fact, is closely allied. It does not appear to branch at all, and therefore is 
scarcély the Micropus minimus; which, however, as well as the WM. globiferus, no doubt belongs 
to the present genus, 
* 
