206 Karl M. Wiegand and Arthur J. Eames 



2. N. variegatus (Engelm.) Fernald. (Nuphar variegatum and americanum and 



Nymphaea varicgata and amcricana of various authors.) 



In the ponds of peat bogs, and in other places where the soil is of a more acid and 

 mucky nature than where the preceding species occurs ; frequent. June- Aug. 



Spencer Lake ; Summit Marsh ; Etna mill pond ; Lake Como ; Phillips Pond. 



Newf . to B. C, southw. to n. N. J., Pa., Ohio, and Mont. ; infrequent on the 

 Atlantic Coastal Plain. 



This species is somewhat doubtfully distinct from the preceding, at least in certain 

 parts of its range. 



3. N. microphyllus (Pers.) Fernald. {Nuphar pumilum of Cayuga Fl. Nuphar 



Kalmianum (Michx.) Ait. Nuphar micro phyllum and Nymphaea micro phylla 

 of various authors.) 



In small ponds and slow-flowing streams : rare. July-Aug. 



North Spencer, 1880 (D.) ; ditches near the Ithaca fair grounds (D.) ; bayou near 

 mouth of Fall Creek, 1876 (D.) ; [Groton mill pond, 1877 (Prof. S. G. Williams), 

 same station, 1881 (D.)]. "Flowers have never been found in this region" (D.). 

 The plant is at present unknown to the authors in the Cayuga Lake Basin, though 

 it occurs twenty-five miles to the eastward. There is a possibility that it may have 

 been confused with the preceding species. 



E. Que. and N. B. to Ont. and Minn., southw. to Conn., n. N. J., Pa., and Ohio. 



2. Nymphaea L. 



a. Flowers 7-12 (IS) cm. in diam., sweet-scented; sepals often purplish outside; 



petals generally with an ovate apex ; inner filaments narrower than the anthers ; 



seeds 1.5-2.3 mm. long ; leaves usually purplish beneath and indistinctly veined ; 



branches of the rhizome not constricted at base. 1. N. odorata 



a. Flowers 10-23 cm. in diam., scentless or nearly so; sepals green; petals generally 



rounded at apex ; filaments broader than the anthers ; seeds 2.8^1.4 mm. long ; 



leaves green beneath and prominently veined, usually larger ; branches of the 



rhizome constricted at base, tuber-like, readily detachable. 2. N. tubcrosa 



1. N. odorata Ait. (Including var. minor Sims. Castalia odorata of various 



authors. See Rhodora 18 : 161. 1916.) Sweet Water Lily. White Water Lily. 



In acid, neutral, or slightly alkaline ponds and marshes ; infrequent. July-Aug. 



Spencer Lake; Summit Marsh (D. !) ; Cayuta Lake (D.) ; Lake Como (Locke 

 Pond, D.) ; Canoga Marshes (D. !) ; Cayuga Bridge (D.\). 



Newf. to Man., southw. to Fla., La., and Kans. ; a characteristic plant on the 

 Coastal Plain. 



(For a discussion of the differences between this species and the next, see 

 Conard, Proc. Iowa Acad. Sci. 23:621. 1916.) 



2. N. tuberosa Paine. (Castalia tubcrosa of various authors.) 



Marshes and lake borders ; local. July-Aug. 



Renwick ; Beebe Lake ; abundant in Fall Creek at Freeville and Etna ; " from 

 Cayuga Bridge, north; abund. near Black Lake" (D. !). 



Lake Champlain to Trenton, N. J., westw. to Nebr. and Ark. 



This is a plant of the richer, less acid marshes and waters of the interior. Conard 

 expresses some doubt as to its validity as a species, but observation in this flora 

 gives the impression that it is such. It is said to have been introduced into the mill 

 pond at Freeville from Lake Ontario. This introduction probably occurred after the 

 publication of Dudley's Cayuga Flora. 



