SYNGENESIA SUPERFLUA. 
335 
yellow, afterwards white. Stigmas nearly acute. Seed and Pappus exact- 
ly similar to those of the preceding species; the pappus, however, is less 
coloured. 
These two species are probably distinct, yet they are so nearly allied 
that it is not easy to point out their specific distinction. I have never seen 
an individual of either species without glands on the leaves of the involucrum. 
The one which I have seen most nearly naked, belonged to this species. 
Judging from the specimens now before me, I should say that the leaves of 
the C. Argentea are narrower, thicker, and the nerves so close as not to be 
very distinct, that the flowers, and consequently the seed are much larger, 
and the stem nearly naked towards the summit. In the C. Graminifolia the 
leaves are conspicuously nerved, the corymbs generally more compact, and 
the heads more numerous. 
Grows in dry sandy soils. 
Flowers July — October. 
3. PlNIFOLIA. E. 
Very glabrous; stem 
rigid; leaves linear, 
crowded, rigid; corymb 
large; scales of the in- 
volucrum woolly at the 
summit. 
Root perennial. Stem eighteen to twenty-four inches high. Leaves 
very numerous, crowded on the stem, four to six inches long, on the branches 
small, linear, with the midrib somewhat conspicuous, under a lens finely ser- 
rulate. Corymbs terminal. Floioers nearly as large as in any species of this 
genus. Involucrum imbricate, scales linear-lanceolate, a little woolly near 
the point. Florets of the ray about fifteen, of the disk very numerous, all 
bright yellow. Stamens of the disk longer than the corolla. Anthers white, 
with their projecting summits very conspicuous, lanceolate. Style longer than 
the stamens, two-cleft. Stigma glandular. Seeds all similar, long, hairy, 
hispid. The exterior pappus subulate, lacerate, whitish, the interior very 
scabrous, reddish brown. Receptacle naked. 
Grows on the summits of the sand bills, between the Flint and Chatahoo- 
chee rivers. 
Flowers September — October. 
C. glaberrima; caule 
rigido; foliis linearibus, 
confertis, rigidis; co- 
rymbo majusculo; in- 
volucri squamis apice 
lanosis. E. 
4. Mariana. 
C. pilosa; foliis ob- 
longolanceolatis, ser- 
ratis, superioribus ses- 
Hairy; leaves ob- 
long, lanceolate, ser- 
rate, the upper sessile, 
