VOL. II.] 



WATER LILY FAMILY. 



43 



Red-disked Pond Lily. 



2. Nymphaea rubrodisca (Morong) Greene. 



(Fig. 1528.) 



Nnphar rubrodiscum Morong, Bot. Gaz. n: 



167. 1886. 

 Nymphaea rubrodisca Greene, Bull. Torr. 



Club, 15:84. 1888. 

 Nymphaea Fletcheri Lawson, Trans. Roy. Soc. 



Canada, 6: sec. IV. 119. 1888. 



Floating leaves s'-io' long, 2 / -6 / wide, 

 the sinus open or closed, sometimes pubes- 

 cent beneath; submerged leaves generally 

 present, membranous, orbicular; flowers i x - 

 i^' broad, yellow; sepals 5 or 6; petals di- 

 lated upward, or obovoid, 3 X/ -4 X/ long, less 

 fleshy than those of the last; anther nearly 

 the length of the filament; stigmatic disk 

 crenate, bright red or crimson, 9~i2-rayed; 

 stamens in about 5 rows; fruit about i' long, 

 contracted into a neck below the disk, i 7 

 thick. 



In ponds and slow streams, Lake Champlain, 

 Ottawa, Ont., Adirondack Lakes of New York, 

 to southeastern Pennsylvania and Michigan. 

 May-Sept. 



3. Nymphaea Kalmiana (Michx. ) Sims. Small Yellow Pond Lily. (Fig. 1529.) 



Nymphaea lutea var. Kalmiana Michx. Fl. 



Bor. Am. i: 311. 1803. 



Nymphaea microphylla Pers. Syn. 2: 63. 1807. 

 Nuphar Kalmianum R. Br. in Ait. Hort. 



Kew, Ed. 2, 3: 295. 1811. 

 N. Kalmiana Sims, Bot. Mag. pi. 1243. 1809. 



Leaves 2 / -4 / long, i'-$ f broad, the sinus 

 open or closed, commonly more or less 

 pubescent beneath; submerged ones al- 

 ways present, membranous, orbicular, 

 larger; flowers i' in diameter or less, yel- 

 low; sepals 5; petals thin and delicate, 2" 

 long; stamens in 3 or 4 rows, narrowly 

 linear, the anther one-fourth the length of 

 the filament; stigmatic disk crenate or stel- 

 late, 2 // -3 // broad, 6-7-rayed, dark red; 

 fruit ovoid, 6 // -7 // long, with a short neck. 



In ponds and slow streams. Newfoundland to southern 

 New York and Pennsylvania, west to the Saskatchewan and 

 Minnesota. Summer, flowering later than the others. 



4. Nymphaea sagittaefolia Walt. Arrow- 

 leaved Pond Lily. (Fig. 1530.) 

 Nymphaea sagiltaefolia Walt. Fl. Car. 155. 1788. 

 J^uphar sagittaefolia Pursh, Fl. Am. Sept. 370. 1814. 



Floating leaves narrowly ovate or ovate-lanceolate, 

 glabrous, obtuse, 8 / -i5 / long, 2 / -3 / wide; submerged ones 

 numerous, similar, but membranous and commonly 

 larger; flowers yellow, about i' broad; sepals 5; petals 

 broadened above, 3" long; stamens in 4 or 5 rows, the 

 filaments about equalling the anthers; stigmatic disk 

 crenate, n-15-rayed; fruit ovoid, not constricted into a 

 neck, about i' long. 



In ponds, southern Indiana and Illinois, and in the Atlantic 

 -States from North Carolina to Florida. Summer. 



