76 SPARGANIACEAE 



Conn. Rare or wanting near the coast, increasing northwestward. 

 N. Y. Throughout, except on L. I. and S. I., rare southward, 



increasing northward. 

 N. J. Bergen Co., increasing northward. 

 Pa. Not recorded from Delaware Co., increasing and common 



northward. 



Tertiary, o: Cretaceous, only in Bucks Co., Pa.: Older Formations, 

 common, particularly northward. 1 17-179 days. Sea level-3,000 

 ft. 



ANGIOSPERMAE 



MONOCOTYLEDONES 



TYPHACEAE 



1. Typha [Tourn.] L. 



Racemes with staminate and pistillate portions usually separated; 

 pollen of simple grains; fruiting pedicels short, rigid, 1 mm. long 

 or less. I. T. angiistifolia. 



Racemes with staminate and pistillate portions usually contiguous; 



pollen grains in 4's; fruiting pedicels bristle-like, 2-3 mm. long. 2. T. latifolia. 



1. T. angiistifolia L. Marshes, chiefly along the coast: Nova 



Scotia to Fla., westward to Cal. Also in Tropical Am., 

 Europe and Asia. 

 Throughout the range, always decreasing inland. 



2. T. latifolia L. In marshes: Throughout the United States 



and most of Canada. Also in Europe and Asia. 

 Throughout the range. 



SPARGANIACEAE 

 1. Sparganium [Tourn.] L.* 



Achenes broadly obovoid or cuneatc-obpyramidal, sessile, dis- 

 tinctly beaked; inflorescence compound; fruiting heads 2-3 

 cm. in diameter; leaves somewhat keeled. 1. S. eurycarpum. 



Achenes fusiform (in S. minimum somewhat obovoid, but then 

 short beaked and short stipitate). 

 Stipes and beaks each 2 mm. long or more; fruiting heads 1.5 

 cm. in diameter or more; anthers 3-4 times as long 

 as broad. 



* The difficulty of correlating ecological factors in aquatic or semi-aquatic genera, and 

 the comparatively limited material, make it advisable to omit such data in Sparganium, 

 Potamogeton, Sagittaria, Utricularia and a few others. 



