1374 CARDUACEAE 
16. A. Lowrieanus Porter. Stem 3-12 dm. tall, glabrous or nearly so through- 
out, branched: leaf-blades thickish, firm, a little succulent, those of the basal 
leaves slender-petioled, ovate to udi ee cor ate, acute or obtusish, 
serrate, 5-15 cm. long, those of the cauline leaves ovate to elliptic, often 
cordate, dads uis “winged petioles, the uppermost lanceolate: heads 
usually n ery num , 15-25 mm. broad, loosely panicled: involucre turbi- 
nate; Ba obtuse or bu appressed: ray-flowers 12- 20; pip: i Bou 
8 — 108 but variable in len ngth qu various provin 
Plain, Ala. to Ky., Ia., Conn., and N. C.—Fall.—Resembles A. pru Ee 
leaf ades smooth and Rr more wing COT and inflorescence less 
pubesce 
A. cordifolius L. Stem 3-15 dm. high, glabrous or nearly so, much- 
aaa and bushy: leaf-blades thin, rough mainly above, pubescent, sharply 
ate ate, 5-12 cm. lo 
oe or sessile , ovate or lanceolate: heads very numerous, small, 12-18 mm. 
broad, handsome: ' involucre turbinate to cylindrie; braets yes dias linear, obtuse 
or obtusish a tipped, appressed: Siei ers 10—20; ligules 6-8 mm. long, 
blue or metimes pale, rarely whit cant te whitish Rich woods and 
thickets, various E didis) rarely Coasta " Plain, Ga. to Miss., Minn., d 
—A. cordifolius albearius, ranging from N. C. and 
Tenn. m Mass., pe "the thin leaf-blades usually smoothish, cordate bna 
lanceolate or broader: inflorescence dense, thyrsoid, not le afy n for em- 
bing that of the lilac: bracts linear, acute: heads medium- E Uguale prn) 
18. A. sagittifolius Willd. Stem rather slender, 6-15 dm. high, strict, gla- 
brous, or sparingly pubescent above, the inflorescence tall and panieulate with 
-ascending branches: leaf-blades thin, glabrous above or but slightly roughened, 
pn npn Mp those of the basal and lower leaves ovate- pic 
to lan ao ordate or rarely sagittate base, 2 serrate, acuminate, 
7—15 em. Tops ith slender naked or narrowly margined petio oles; blades of 
the upper a leaves lanceolate, sessile, or on o and usually margined 
petioles, Serato or entire, those of x bra apis Rl uch smaller, linear- 
Hae late: heads 16—20 mm. broad, o nds bp dk involucre 
urbi nae ; bracts linear- subulate, gl Nie r tips green and 
rr spreading: ray-flowers 10—15; ligules se Or ett 6-8 mm. 
long: pappus whitish Diy soil, various A N of Coastal Plain, Ala. 
to Miss., Kans., N. D., N. B., and N. 6— B sum.—fall. EO DIE A. cordi- 
but its braets n narrower, s subulate-acuminate, and its inflorescence 
, e : 
sa ; 
ss., Okla., and N. iffers from the typical form in its broader looser 
pyramidal inflorescence, its somewhat lar rger and longer-peduncled heads, and 
less serrate leaf-blades none of which may be cordate. 
19. A. plumarius Burgess. is about 3 dm. high, chiefly composed of the 
dense plume-like violet inflorescence: stem smooth, zigzag: leaf-blades very 
smooth and firm, thickish, chiefly a m E and slit-serrate, incline 
to be strongly faleate at r m unequal at the slightly cordate broadish 
d tiol 
base, measuring 7 x em. or less; veins strongly incurved; petioles narrow- 
margined; lower axile lea ns conspieuous, but rapidly diminished, soon becom- 
ing narrowly f alcate-lanceolate and entire, sessile by a taper subcuneate base: 
inflorescence othe aked, ovate ices in outline: bracts narrow, acute, 
their distinct enlarged green 2 chie d ies ulate. EN tops, chiefly on 
balds at 4,800-5,000 ft., Blue Ridge, N. C.—Fall.—Resembles a dwarf A. sagit- 
tifolius, but differs in leaves geras) and es of D als. 
