é : a 
8 AND GENERA OF PLANTS. 339 
very few similar, empty scales. Scales membranaceous, diaphanous, shining, yellowish-white, 
with a greenish oblong centre, internally with a cleft fold, usually enclosing the greater part of the 
floret, and always the seed, on the back, at and towards the base, densely tomentose. The recep- 
tacle, from which the fructiferous scales readily become detached, appears to be a narrow punctate 
cylinder, or rachis, like that $f a spike, round which the scales are imbricated. Stigmas bifid, fili- 
form, very slender. Of the floret it is difficult to detect more than a mere hyaline rudiment. Seed 
(rather than achenium) dark brown, minute, cylindric-oblong, somewhat compressed, obtuse, 
smooth and shining, very acute at base, with only a single thin integument and its lining, as in a 
naked seed. Somewhat allied to Evax and Micropus, but at the same time very distinet. 
MICROPUS. (Linn.) 
Capitulum few-flowered, heterogamous, flowers all tubular; rays about five, 
feminine, filiform; discal florets three to five, masculine, five-toothed. Inyo- 
lucrum about five-leaved, conspicuous or minute. Receptacle small, brac- 
teolate, except the centre, the bractes at length cartilaginous, folded inwards 
closely over the achenium, gibbous and compressed at the sides, (sometimes 
rostrate,) tomentose. Achenium obovate, flatly compressed, naked, without 
pappus, and deciduous with the bractes.—Small annuals of Europe and 
North America, arachnoidly tomentose, resembling Filago or Gnaphalium. 
Leaves alternate, capituli clustered. The | presence of an involucrum, and 
the supposed involucrum being bractes, this genus approaches Evaz. 
§ III. * Ruyncnotepis.—Involucrum five-leaved, paleaceous, fructiferous fais 
rostrate, with chaffy points. 
Micropus *angustifolius; © erect, simple or branching from the base, tall a # 
slender, tomentose; leaves linear, acute, above linear-lanceolate; clusters of 
flowers lateral and terminal, densely lanuginous; discal florets aan sa mas- 
culine three to five. 
Has. St. Barbara, Upper California. Six to eight inches high, leaves erect and. somewhat 
crowded, about an inch long and a line wide. Stem often simple. The capituli like comes round 
’ masses of wool. Female florets almost obsolete. Stigma scarcely exserted. Acheni : 
and compressed. 
