32 TRIANDRIA, MONOGYNIA. 



Bristles white, 4, a little longer than the seed. 



Root fibrous. MuhL 

 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. 



tenuis, 3. S. culm naked, four angled, with a purple sheath 

 wind. below. Sheath truncated, nearly pointed. Spike 



terminal elliptic, acute at both ends, bibracteate. 

 Bracteas ovate, obtuse, black with white margins. 

 Cat. scales 1-valved, resembling a bractea, black, 

 obtuse, margin white. Stam. 3. Pist. trifid, 

 white. Seed roundish, brown, rough, two or 

 more bristles at the base. Root horizontal, creep- 

 ing. MuhL 

 S. quadrangulatus. Muhl. Cat. ed. 1st. I 

 S. tenuis, ditto, ed. 2d. 

 S. quadrangulatus. Bart- Prod. Fl. Ph. 

 S. tenuis. Muhl. Descrip Uber. 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 of 

 Willd. as identical, and so published them in the first edition 

 of his Catalogue. In the second ed. he retains the name quad- 

 ra?igulatus, and that of tenuis as a synonym disappears. i his 

 leaves some doubt of the plant designated in the second edi- 

 tion, by the name quadrangulatus ; probably it is the same 

 described by Mr. Elliot under that name. In the Descriptio 

 Uber. Gram, however, the S. tenuis is described, and the 

 qujtdrungulaius is left out. The plant described in that work, 

 as the tenuisj as quoted above> is the same as the European 



