SYNGENESIA SUPERELUA. 377 
Scales of the involucrum linear-lanceolate, nearly glabrous. Seed a little 
hairj r . 
Grows in rich dry soils, principally along the mountains, Canada to 
Carolina. Pursh. 
Flowers September — October. 
16. Retrorsa. Mich. 
Stem erect, terete, 
glabrous; leaves close, 
ly sessile, linear, taper, 
ing to the summit, gla- 
brous, pellucidly dot- 
ted, reflexed, rough 
along the margin; 
branches of the panicle 
recurved. 
Mich. 2. p. 11 7* Pursh, 2. p. 539. Nutt. 2. p. 159. 
Stem three to four feet high, pubescent towards the summit. Leaves ses- 
sile, somewhat amplexicaule, narrow, about two inches long, tapering almost 
from the base to the summit, slightly mucronate. Panicle composed of 
recurved racemes. Scales of the involucrum linear-lanceolate, slightly 
fringed, the interior much longer than the exterior. Florets of the ray 
three in each head, longer than the involucrum; of the disk three to four, 
yellow. Seeds a little hairy. 
Grows in dry soils very common# 
Flowers August — October. 
S. came erecto, ter- 
eti, glabro; foliis arete 
sessilibus, linearibus, 
superne attenuatis,gla- 
bris, pellucido puncta- 
tis, reflexis, margine 
asperis; paniculae ra- 
mis recurvatis. E. 
17. Tortifoua. E. 
S. caule erecto, pu- 
bescente; foliis lineari 
lanceolatis, subserratis, 
patulis, tortuosis, supra 
nervoque scabris, sub- 
tus subglabris; pani- 
cula pyramidata, ra- 
ce mis recur vis. E. 
Stem erect, pubes- 
cent; leaves linear-lan- 
ceolate, slightly ser- 
rate, expanding, twist- 
ed, the upper surface 
and midrib scabrous, 
the under nearly gla- 
brous; panicle pyrami- 
dal, racemes recurved. 
b S 
voi„ n. - 
