32 
TRIANDRIA, MONOGYNIA. 
tenuis, 
Willd. 
Bristles white, 4, a little longer than the seed.- 
Root fibrous. MuhU 
S. capillaceus, Mich. 
S. pusillus. Vahl. and Pursh quoting him. 
S. acicularis. Pursh. 
Not S. capillaceus, Elliot, who quotes Michaux’s 
plant, which this really is. 
This little plant has the habit of S. acicularis of Europe, and 
a comparison of it with genuine specimens of the foreign 
plant, convince me that the two are very closely allied. In 
Jersey, surrounding the pool containing Utricularia cerato- 
phylla (see page 11) in great profusion, forming a kind of 
grass-plot. In other similar places in Jersey also frequent. 
More rare on the Pennsylvania side of the Delaware. Annual.? 
June. 
3. S. culm naked, four angled, with a purple sheath 
below. Sheath truncated, nearly pointed. Spike 
terminal elliptic, acute at both ends, bibracteate. 
Bracteas ovate, obtuse, black with white margins. 
CaL scales 1-valved, resembling a bractea, black, 
obtuse, margin white. Siam. 3. Pist. trifid, 
white. Seed roundish, brown, rough, two or 
more bristles at the base. . Root horizontal, creep- 
ing. MuhU 
S. quadrangulatus. Muhl. Cat. ed. 1st. ? 
S. tenuis, ditto, ed. 2d. 
S. quadrangulatus. Bart. Prod. FI. Ph. 
S. tenuis. Muhl. Descrip TJber. Gram. 
Mr. Elliot describes a plant under the name of Scirpus 
quadrangulatus, for which he quotes Michaux’s name and 
description . The size of the plant, and the spikes, which he 
says are an inch, or more long, together with other characters, 
sufficiently prove that it is different from Willdenow’s and 
Muhlenberg’s tenuis • The latter used to consider Michaux’s 
plant under the name quoted by Mr. Elliot, and the tenuis 
Willd. as identical, and so published them in the first editioii 
of his Catalogue. In the seconded, he retains the name quaA^ 
rangulatusi and that of tenuis as a synonym disappears. Fhis 
leaves some doubt of the plant designated in the second edi- 
tion, by the name quadrangulatus ; probably it is the same 
described by Mr. Eliiot under that name. In the Descriptio 
Uber. Gram, however, the S, tenuis is described, and the 
quadrangulatus is left out. The plant described in that work, 
as the tenuisf as quoted above, is the same as the European 
