312 
SYNGENES1A iEQUALIS. 
SPARGANOPHORUS. Goert. 
Involucrum, subglo- 
bosum imbricatum; 
squamis apice recurva- 
tis. Semina coronata 
cupula subcartilaginea 
nitida. Receptaculum 
nudum. 
Involucrum some- 
what globose, imbri- 
cate; scales recurved 
at the summit. Seeds 
crowned with a carti- 
laginous shining cup. 
Receptacle naked. 
1. Verticillatus. 
S. foliis linearibus, 
verticillatis; capitulis 
paucis, terminalibus; 
cupula campanulata, 5- 
dentata. 
Leaves linear, verti- 
cillate; heads few, ter 
minal; cup campanil- 
late, 5-toothed. 
Mich. 2. p. 95. Pursh, 2. p. 518. Nutt. 2. p. 139- 
Ethulia Uniflora. Walt. p. 195. 
An aquatic plant, growing in shallow water. 
Roots fibrous, creeping. Stem scarcely exceeding a foot in height, pube- 
scent towards the summit, simple. Leaves linear, about an inch long, gla- 
brous, verticillate, generally six in each whorl. Heads terminal, sometimes 
solitary, frequently accompanied with other heads near the summit. Invo- 
lucrum imbricate, containing many flowers, leaves lanceolate, acuminate, 
pubescent, the summits recurved, coloured. Corolla tubular, not much lon- 
ger than the involucrum, pale purple. Seed glabrous, five angled, crowned 
with a membranaceous pappus, deeply five-cleft. 
The pappus in this species appears to me to be composed of five distinct, 
ovate, membranaceous, denticulate scales, forming a proper calyx. 
Grows in the flat pine barrens in the middle districts of Carolina. 
Flowers-— 
HYMENOPAPPUS. L’Heritier. 
Involucrum polyphyl- 
lum, foliolis obovatis 
coloratis, patentibus, } 
Involucrum many 
leaved, leaves obovate 
coloured, expanding, 
