52 Karl M. Wikgand and Arthur J. Eames 



Ditches on the Inlet Marshes (H. D. Lord. D.\) Beebe Lake; Renwick; Myers 

 Point; King Ferry (D.) ; Sheldrake (D.) ; Canoga (D.) ; Union Springs; Cayuga 

 (D,) ; near Indian Salt Springs (D.) ; Montezuma; Lowery Ponds. 



Throughout N. A., chiefly in brackish water ; nearly cosmopolitan. 



4. Najas L. 

 a. Leaves coarsely and distantly toothed, the auricles large ; seeds very finely lineate, 

 oblong in outline. 

 b. Auricles without conspicuous teeth ; blades ascending or spreading, as also the 

 stems. 

 c. Leaves 2 mm. wide; auricles entire. 1. N. marina 



c. Leaves 0.5 mm. wide; auricles denticulate. la. N. m., var. gracilis 



b. Auricles with a single strong projecting tooth on each side ; blades recurved, 

 coarsely toothed, purplish ; stem also recurved. lb. N. m., var. rccurvata 



a. Leaves minutely serrulate, the auricles scarcely dilated ; seeds smooth, oval- 

 lanceolate in outline. 2. N. flexilis 



1. N. marina L. 



Shallow lake waters, probably influenced by the salt springs of the neighborhood ; 

 local. Fr. July-Sept. 



Frequent near Canoga Marshes (D. !), and north of the railroad bridge, Cayuga 

 (£>.!) ; Duck Lake {A.J. E., K. M. W ., & L. F. Randolph) ; Crusoe Lake (/. G. 

 Needham & C. W. Leister). 



In the vicinity of salt springs : N. Y., Mich., Minn., and Fla., and from Utah to 

 Calif, and Mex. Found also in W. I., Eurasia, and Australia. 



la. N. marina L., var. gracilis Morong. 



"Off Canoga Marshes" (D.). 



Cent. N. Y. and Fla. 



The validity of this and the following variety may be questioned. They should 

 receive further study. 



lb. N. marina L., var. recurvata Dudley. 



"In the shallow water of Black L. Cayuga Marshes" (D.) ; "Cayuga Lake" 

 (Morong in Gray Herb.). 



N. Y., Utah, and Ariz. 



2. N. flexilis (Willd.) Rostk. & Schmidt. 

 Pools and lakes ; common. Fr. July- Aug. 



Lab. to B. C, southw. to Fla., Tex., and Calif. Found also in Eurasia. 



15. JUNCAGINACEAE (Arrow Grass Family) 



a. Carpels nearly distinct, broad, divaricate, follicular ; anthers linear ; raceme few- 

 flowered ; rootstocks strongly creeping. 1. Scheuchzeria 

 a. Carpels united until maturity, then separating from the persistent axis, the fruit 

 subcylindrical ; anthers oval ; raceme many-flowered ; rootstocks but slightly 

 developed. 2. Triglochin 

 1. Scheuchzeria L. 

 1. S. palustris L., var. americana Fernald. (See Rhodora 25: 177. 1923.) 

 Sphagnum bogs, in acid soils ; rare. May 25- June. 



Junius peat bogs (D.\) ; n. end of Duck Lake (K. M. IV., L, H. MacDaniels, & 

 F. P. Metcalf) ; Featherbed Bog (F. P. Metcalf). 



Newf. to Hudson Bay and Alaska, southw. to N. J., Pa., Wis., and Calif.; 

 rare on the Atlantic Coastal Plain. Found also in Eurasia. 



