SYNGENESIA NECESSARIA. 
473 
Semina compressa, 
apice subdentata, stylo 
persistente aristata. 
1. Stolonifera? 
G. herbacea, pro- 
cumbens, repens, gla- 
bra; foliis pinnatifidis, 
floribus ad radicem 
sessilibus. 
Seeds compressed, 
slightly toothed on the 
summit, awned with 
the persistent style. 
1 Herbaceous, pro- 
I cumbent, creeping, 
glabrous; leaves pin- 
natifid; flowers sessile 
■ at the root. 
Nutt. 2. p. 134. 
Hippia Stolonifera? Sp. pi. 3. p. 2383. Persoon, 2. p. 497* 
Root perhaps perennial, shooting out short runners (stolones) on all sides 
just under the surface of the ground, which produce new plants; each plant 
bearing five to six radical leaves and one sessile capitulum in the centre of the 
leaves. Leaves small, pinnatifid, with the segments linear and sometimes 
toothed, somewhat succulent and sprinkled with soft cottony hairs, the peti- 
ole-like base of the leaves four to eight lines long. Involuerum twelve to 
sixteen leaved, in a simple series; leaflets oblong, rather obtuse, hairy. Ste- 
rile florets in the centre of the capitulum, corolla funnel shaped, very slen- 
der, anthers closely united. F emale florets in the circumference, corolla 
and stamens 0, germ dilated and woolly at the summit, margined. Style 
long, incurved, slightly two-cleft. Receptacle naked. Seed inversely 
wedge-shaped, crowned with the persistent style, winged, margin corrugate. 
R. Brown is disposed to consider Gymnostyles as only a section of the 
genus Soliva. The character of that genus, however, as given in Persoon, 
must be reformed before it can include this plant. 
Grows in damp sandy soils. On Harleston’s Green, Charleston. Mf„ 
Middleton’s, Ashley River. Mr. Pinckney’s, Ashepoo. 
Flowers February— May. 
PARTHENIUM. 
Gen. Pe. 1428. 
Involuerum 5-phyl- 
lum. Radii corollulce 
minimae. Semina ob- 
ovata. Pappus nullus. 
Recep taculum palea- 
ceum, planum. 
Involuerum 5-leav- 
ed. Florets of the ray 
very small. Seed obo- 
vate. Pappus 0. Re- 
ceptacle chaffy, flat. 
VOR. II. 
o 3 
