= are S : 
ae ay Fix, 
‘174 2 SYNGENESIA, FRUSTRANEA. 
florets minutely. 5-toothed, viscid. Seed short and obco- 
nic, shorter than the chaffy calicle. Pappus about 5 or 
6-leaved, awned.t Receptacle hemispherical, naked. Has. 
On high ‘gravelly hills near Fort Mandan, Missouri. Flow- 
ering in June and July. 
Of this genus, which does not appear to have any natu- 
ral affinity with Hymenepappus, there is a second species 
indigenous to Buenos Ayres. 
+ mn 
_ Onpen ILI.—POLYGAMIA FRUSTRANEA. 
(Discal florets bisexual; rays neutral, gtenite.) 
586. * LEPTOPODA. 
Calix simple, many-parted. Rays 20 or more, 
semitrifid, broader at the summit. Receptacle , 
naked, hemispherical. ee paleaceous, 8 to “ 
- 10-leaved, awnless. — : 
_ Herbaceous; stem 1 Tomered, Cedsedle very long: _ 
leaves alternate, decurrent, very entire and smooth; flower 
entirely yellow. 
L. Helentum. Galardia fimbriata?. Mich. Flor. 2. p. 142. a 
Oss. Perennial. Very smooth. Stem attenuated, and * 
oved, about 2 feet long. Peduncle 12 inches, a little 
nder the calix. Leaves few, eee 
+The number of paleaceous leaflets crowning the aie of 
) many syngenesious genera, will often be found to constitute. 
essential generic distinctions, than m y others which are 
