962 . Compositae. 
Branches of the style somewhat flattened and pointed. Anthers 
without tails. Achenes flattened with a pappus of many hairs. 
A very numerous North American genus, with a few species spread 
over northern Asia, Europe, and some other parts of the world. Several of 
the North American ones are known among the autumnal plants in our flower- 
gardens under the name of Michaelmas Daisies. 
A. Involucre well imbricated; the bracts appressed 
and coriaceous, with short and abrupt mostly ob- 
tuse herbaceous or foliaceous spreading tips (the 
outermost sometimes loose and more foliaceous): 
achenes narrow. 5—10-nerved, from minutely pu- 
bescent to glabrous: pappus mostly more rigid 
than in any of the following: rays showy, blue 
or violet: leaves of firm texture, more or less 
SCADROUS. cites. ciehe | sper ey tiers: sie) 5) gato) eeu gee 
B. Involucre and usually branchlets viscidly or prui- 
nose-glandular, therefore more or less graveolent, 
either well imbricated or loose: rays showy, violet 
to purple: achenes mostly several-nerved and nar- 
row: pubescence not sericeous: leayes all entire 
or lower with few and rare teeth, except in 
some forms; cauline all sessile or partly clasping: 
true perennials, mostly multiplying by  sub- 
terranean rootstocks or other shoots ... . . 2. A. integrifolius, 
©. Heads and inflorescence various: no cordate 
petioled leaves: radical leaves all acute or at- 
tenuate at base: not glandular nor viscid, nor 
silky-canescent: akenes compressed, few-nerved. 3. A. Novi-Belgii. 
1319. (1.) Aster radula Ait. Hort. Kew. III (1811), p.210. — 
DC. Prodrom. V, p. 230. — Torr. and Gray Flor. II, p. 106. — Aster 
nudiflorus Nutt. Gen. Il, p. 157. —- Nearly glabrous or with some 
scattered hairs: stem slender and strict, 30—70 cm or more high, 
bearing few or solitary mostly slender-pedunculate heads: leaves 
veiny, oblong-lanceolate or narrower, acuminate, somewhat hispidulous- 
scabrous, thinnish (inclined to be rugulose in drying, about 5 cm 
long, 6—18 mm wide), each margin with 3—7 serratures toward 
the middle; upper cauline sometimes oblong-ovate with subcordate 
sessile base involucre nearly hemispherical, 6—10 mm _ high; its 
bracts in few series, obtuse, ciliolate; the outermost oblong, inner 
narrower, shorter than the disk: rays 5mm to 10 cm long, pale 
violet; achenes glabrous, striate-nerved. — Flow. March to April. 
N. d. Rosetta; Zaqaziq, naturalized. 
An North American native. 
i, 
4 
] 
