120 GBOEGB LAWSON 



pollen to be bad, as usual in hybrids, 95 percent, of the grains being empty sacs without 

 ibvilla. 



The denoting of hybrids by pedigrees of descent instead of names, as was Caspary's 

 custom, is rather disturbing to a binomial system. I have, therefore, suggested a needed 

 name. Mr. Thomas Morong has described, as Nvphar rubrodiscum, a Lake Champlain form 

 AA''hich has sound pollen grains and fruits freely ; he regards it as " a new and perfect 

 species," developed from the hybrid, and synonymous with the Niiphar luleum of G-ray's 

 Manual, (Botanical Gazette, XI, p. 16*7. July, 1886.) This is Nymphœa ruhrodisca, Greene, 

 Bulletin Torrey Bot. Chib, March, 1888, p. 84. 



4.— N. PUMILA, Hoffm., Deutschlands Flora, (1800), p. 241. (Smith). N. luiea ft 

 minima, Will., Sp. PL, II, p. 1151. Nuphar minimum, Smith, E. Bot., t. 2292, (1811.) Rees's 

 Cyc, XXV. Nuphar pumilum., Sm., Eng. Fl., Ill, p. 16. Lawson, Water Lilies, p. 101. 



Mountain Lakes of Scotland and other parts of Northern Europe, rare. 



5. — N. MIOROPHYLLA, Persoon, Synops. Plantarum, II, p. 63, (1801). Britten, Jour. 

 Bot., XXVI, p. 9. 



N. Intea ft. Kalmiana, Michaux, Fl. B. A , I, p. 311, (1803). 



N. Kalmiana, Sims, Bot. Mag., t. 1243, (1809). 



Nuphar Kulmianum, E. Br., Ait. Hort. Kew., ed. 2., Ill, p. 295, (1811). Smith, Rees's 

 Cyc, XXV. DC, Syst-, V, p. 61, (exc. syn. Walt. Fl. Car.) Pursh. Barton. Hooker. 

 G-ray. Wood. 



Niiph. luteum var. Kalminannm, Torr. and Gray, Fl. I, p. 58. 



Nuph. Inteum var. pumilum, Gray, Manual, ed. 5, p. 5t. Macoun, Cat. Can. PI. 



Nymphœa lutea, Linn., Sp. PL, ed. 2, p. '729, in part, (the Canadian plant from Kalm). 



Canada and other parts of North America, not common. 



6. — N. POLYSEPALA, Greene, Bulletin Torrey Bot. Club, March, 1888, p. 84. 



Nuphar pohjsepalum, Engelm. in Trans. Acad. St. Louis, II, p. 282, (1865.) A. Gr., 

 Proc. Am. Acad., VIII, p. 3*76. Macoun, Cat. Can. PL, pp. 32 and 484. Porter, Fl. 

 Colorado, p. 5. 



This Western American plant is obviously nearly related to Nuph. advena, and when 

 more carefirlly studied may come to be regarded as a variety of that species. 



1. — N. SAGITTIFOLIA, Walter, Flora Carolina, p. 154, (1*788). 

 N. lonnifoHa, Michaux, FL B. A., I, p. 312, (1803). 

 N. mgiUirJolia, Salisbury, Ann. Bot. II, p. "71, (1805). 

 N. sagiltata, Pers., Synop., (180*7.) 



Nuphar sagittcefolium, Pursh., Fl. Am. Sep., II, p. 3*70 (1814.) Morong, Bot. Gaz., XI, 

 p. 169. 



Nuphar Jongifolium, Smith, Rees's Cyc, XXV. 



This may probably be a southern form of Nuph. advena. 



8. — N. Japonica. 



Nymphœa lutea, Thunb., Fl. Jap., (exc. syn). 



Nuphar Japonicum, DC, Syst., II, p. 62, Prod., I, x>. 116. 



Japan. 



