SYNGENESIA FRUSTRANEA. 
433 
COREOPSIS. Gen. Pe. 
Involucrum duplex, 
poly phy Hum, exterius 
aequale. Flores radia- 
ti. Semina compressa, 
eraarginata, bidentata, 
vel bisetosa, setis nec 
retrorsum aculeatis. 
Receptaculum paleace- 
um. 
Involucrum double, 
many leaved, the ex- 
terior one equal. 
Flowers radiate. Seeds 
compressed, emargin- 
ate, two toothed or two 
awned; awns not re- 
trorsely aculeate. Re- 
ceptacle chaffy. 
* Foliis oppositis , I * Leaves opposite , 
indivisis. I undivided . 
1. Lanceolata, Lin. 
C. foliis sessilibus, 
lanceolato - linearibus, 
integerrimis, ciliatis; 
pedunculis elongatis, 
nudis; seminibus orbi- 
culatis, scabris, alatis, 
apice bidentatis, emar- 
ginatis. 
Leaves sessile, lan- 
ceolate-linear, entire, 
ciliate; peduncles long, 
naked; seed orbicular, 
scabrous, winged, two 
toothed at the summit, 
emarginate. 
Sp. pi. 3. p. 2256. Walt. p. 215. Mich. 2. p. 137- Pursh, 2. p. 567, 
Nutt. 2. p. 179. 
Root perennial, (bi-triennial, Dill.) Stem very short, divided at the base, 
procumbent, sprinkled with a few long hairs, the summits naked. Leaves 
opposite, sessile, linear-lanceolate, acute, entire, sometimes slightly undulate, 
fringed toward the base. Flowers solitary, on naked branches about a foot 
long. Involucrum , each about eight-leaved, all nearly of the same length, lan- 
ceolate, glabrous, membranaceous and coloured, (particularly the interior) 
along the margin. Florets of the ray about eight, bright yellow, dilated and 
toothed at the summit; of the disk somewhat numerous, yellowish. Seeds 
compressed, nearly black, winged and crowned with two small, subulate, 
hairy, deciduous awns. Chaff of the receptacle very narrow. 
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VOL. IT, 
