86 ALISMACEAE 



Conn. Common along the coast. 

 N. Y. Along the coasts of L. I., N. Y. City and S. I. 

 N. J. Hudson Co. to Ocean Co. along the coast; reported also 

 from Sussex Co. 

 The reported occurrence of T. palustris L. at Pine Plains, Dutchess Co., has never 

 been satisfactorily established. 



2. Scheuchzeria L. 

 I. S. palustris L. In cold bogs: Labrador to Alaska, N. J., Pa., 

 Wise, Mont., Cal. Also in Europe and Asia. 

 Conn. New Haven, Hartford and Litchfield counties, increasing 



northwestward. 

 N. Y. Bingham Mt., Dutchess Co., and Tannersville, Greene Co. 

 N. J. Budd's Lake, Morris Co., decreasing southward and local in 



Camden and Gloucester counties. 

 Pa. Pike, Wayne, Monroe and Carbon counties. 



Tertiary, o: Cretaceous, localized in thermally favorable bogs:* 

 Older Formations, common, increasing northward. 123-176 days. 

 Sea level-1,824 ft. 



ALISMACEAE 



Carpels borne in 1 series; achenes verticillatc. 1. Alisma. 



Carpels borne in several series; achenes capitate. 



Flowers perfect. 2. Helianthium. 



Flowers polygamous, monoecious or dioecious, the lower 

 perfect or pistillate, the upper staminate. 

 Lower flowers of inflorescence perfect . 3. Lophotocarpus. 



Lower flowers of inflorescence pistillate. 4. Sagittaria. 



i. Alisma L.* 

 1 . A. subcordatum Raf . (not the Old World A . Plantago-aquatica 

 L. until recently credited to America). In mud or shallow 

 water: Mass., Minn., Fla. and Tex. 



Common throughout the range in favorable situations. 



2. Helianthium Engelm.* 

 1. H. parvulum (Engelm.) Small. (H. tenellum Britton). A 

 rare and local plant: Mass. to western Ont., Minn., Fla., 

 Tex. and Mex. Also in Cuba and Porto Rico. 



Maple Grove and Flushing, L. I., and Delanco, Burlington Co., 

 N. J., are the only stations known in our area. 



* See Introduction paragraph 36. 

 t See footnote, page 76. 



