19 



4. Nuphar advena (Ait.) Ait. f. Figs. 5, 7, Map 9 



Locally abundant in the intertidal zone of Merrymeeting Bay, 

 Sagadahoc Co., Maine and at a few locations along the coast of 

 Connecticut. Beal (1956) recognized this taxon as N. lutea subsp. 

 macrophylla (Small) Beal. Range extends from southern coastal 

 Maine and coastal Connecticut west to central New York, Pennsylva- 

 nia, Ohio, southern Michigan, southern Wisconsin, and southeastern 

 Nebraska, south to Florida, Texas, and eastern Mexico. 



NELUMBONACEAE 



Nelumbo (Lotus, Water Chinquapin) 



Perennial, arising from rhizomes; leaves large, circular, peltate, 

 elevated high above the water (fig. 8) or floating; flowers large, 

 showy; perianth sulfur-yellow, 12-25 cm broad, elevated above the 

 water; stamens numerous, readily deciduous; carpels numerous, 

 separate, imbedded in a broad, flat-topped receptacle; fruits indehis- 

 cent nutlets, often remaining in cavities of the woody receptacle. 



1. Nelumbo lutea (Willd.) Pers. Fig. 8, Map 10 



Widely scattered throughout southern New England in shallow 

 ponds and along shores. The localities in New England are probably 

 the result of introductions or escapes from cultivation. A large popula- 

 tion occurs at the Great Meadows National Wildlife Refuge, Concord, 

 Massachusetts. Ward (1977) notes that because the name Nelumbo 

 pentapetala (Walt.) Fern, is of uncertain application, nomenclatural 

 stability is better served by the use of Nelumbo lutea (Willd.) Pers. for 

 the American Lotus. Range extends from southeastern Maine and 

 Massachusetts west to New York, southern Ontario, Minnesota, and 

 Iowa, south to Florida, Oklahoma, and eastern Texas. 



CERATOPHYLLACEAE 



Ceratophyllum (Coontail, Hornwort) 



Perennial, free-floating submersed aquatic, lacking roots; leaves 

 whorled, sessile or with short petioles, dichotomously divided into 

 narrow segments (seedling leaves often opposite, simple); plants 

 monoecious; flowers unisexual, axillary, one to several per node; fruit 

 a 1-seeded, ovoid-oblong achene. 



