100 



Sauv., Flor. Cubana, p. 176 (1868); IV. limnophila, S. Hart 

 Wright, Bull. Torr. Club, xiv, p. 135 (1887). 



When examining the specimens of this plant kindly sent me 

 by Mr. Wright, in June, 1887, I was much occupied with other 

 matters and failed to recognize them as the same as Charles 

 Wright's No. 3775, which had already received a name as cited 

 above. I do not question the validity of the genus established 

 by him, but would suggest its nearer affinity to Heleocharis, as 

 indicated by Sauvalle, than to Diilichium, as supposed by Mr. 

 Wright. 



Heleocharis Engelmanni, Steud., Syn. 79. This species was 

 described from specimens collected by Dr. Engelmann, at St. 

 Louis, Mo., and labelled by him: " £". obtusa, Schult? var. setis 

 brevioribusy It has an elongated, sub-cylindrical, often acutish 

 spike and bristles only about the length of the achenium, or even 

 shorter. In looking over a quite extensive suite of specimens of 

 Heleocharis ovata (Roth), R. Br. {H. obtusa, Schultes), I find 

 considerable variation in the relative lengths of bristles and 

 achenium, while many which would fall under H. ovata through 

 this character have heads elongated. The specimens most nearly 

 according with Steudel's description of H. Engelmanni are from 

 St. Louis (Engelmann, Riehl), Oquawka, Illinois (Patterson), 

 (the var. detonsa, Gray), Tinicum, Delaware Co., Penn. (Porter) 

 and "hills in Waltham, Mass.," (B. D. Greene) the last being the 

 H. obtusa, var. (3, Torrey, Ann. Lye, iii., 303. The material at 

 command indicates that Steudel's species is a variety of the wide- 

 spread H. ovata, as remarked by Dr. Watson, in Bot. Cal., ii, p. 

 222, but more material is needed to settle this beyond dispute. 

 The Eleocharis diandra, C. Wright, in Bull. Torr. Club, x., p. 

 10 1, seems clearly to belong here, and was so placed by Dr. 

 Gray in Bot. Gaz., iii., p. 81, before Mr. Wright's description was 

 published. 



DiCHROMENA CEPHALOTES (Walt.) {Scirpus cephalotes, 

 Walt, Flor. Car., p. 71 (1788); D. leucocephala, Michx., Flor. 

 Bor. Am., i, p. 37 (1803).) 



Dichromena pubera, Vahl. Specimens collected by Dr. Wat- 

 son in Guatemala (No. 166 a) are markedly proliferous, after the 

 manner of some other sedges, the peduncles rooting at their apices. 



