FERNALD. — ELEOCHARIS OVATA. 497 



of E. ohtusa, but only about five eighths as broad as the achene : bristles 

 few and short, generally none. — Bull. Torr. Club, x. 101 ; Britton, Bull. 

 Torr. Club, xv. 100 (under E. Engelmanni^) ; Britton, Jour. N. Y. 

 Microsc. Soc. v. 102 (under E. ovata). — On high sand-bars of the Con- 

 necticut River, between Hartford and Wethersfield, Connecticut (Chas. 

 Wright). A little known species ; not satisfactorily referable, however, 

 to either of the older forms with which some authors have placed it. 



While studying the material associated with EUocharis ovata, the an- 

 nual plants passing as E. intermedia were also examined. This compar- 

 atively rare species is generally well understood, but a plant growing in 

 marshes on the Gatiueau River (a tributary of the Ottawa) has a very 

 different achene, and it may well be distinguished, in recognition of its 

 discoverer and his equally alert father, as 



E. Macounii. — Fig. 26". — Annual: culms slender, weak, the long- 

 est 2 or 2.5 dm. long: heads elliptic-lanceolate, about 1 cm. long, more 

 densely flowered than in E. intermedia (Fig. 25), the ovate-lanceolate or 

 oblong-lanceolate acutish or blunt scales dark brown : achene much com- 

 pressed, obscurely triangular in cross-section, obovate, less elongated than 

 that of E. intermedia (Fig. 26); the deltoid-conical tubercle nearly as 

 broad and one half as high as the body of the achene. — Borders of 

 marshes. North Wakefield, Quebec, Sept. 13, 1893 {James M. Macoun, 

 no. 7552). In its elongated dark heads this Canadian plant more nearly 

 resembles the European E. carniolica than the American E. intermedia. 

 From them both, however, it is clearly distinguished by its more com- 

 pressed obscurely angled achene, and its much broader tubercle. 



1 The reference here made by Dr. Britton to a note of Dr. Gray in Bot. Gaz. 

 iii. 81, must have arisen through a misapprehension, for the only plants mentioned 

 by Dr. Gray in tlie place cited are true E. Engelmanni and its var. detonsa. 



VOL. xxxiv. — 32 



