MILLER AND STANDLEY—NORTH AMERICAN NYMPHAEA. 69 
Tomentosum. Nuphar advena 8 tomentosum Torr. & Gr. Fl. N. Amer. 1: 58, 1838. 
This name was based on a specimen of Nymphaea advena collected 
by Thomas Nuttall in the vicinity of Philadelphia, Pennsylvania, 
and labeled by him Nuphar tomentosum. It is still extant in the 
herbarium of the Academy of Natural Sciences of Philadelphia. The 
supposed pubescence of the petioles and lower surface of the leaves is 
merely a dense growth of alge. 
Ulvacea. See page 97. 
Variegata. Nuphar advena var. variegatum Engelm, in A. Gray, Man. ed. 5, 57, 
1867. 
Under this name, based apparently on specimens from Michigan, 
Nymphaea americana was first, though imperfectly, distinguished 
from N. advena. Later it was used in binomial form for the same 
plant by G.S. Miller.’ 
SYSTEMATIC TREATMENT. 
NYMPHAEA L. 
1753. Nymphaea L. Sp. Pl. 510. Type, Nymphaea lutea L. (Salisbury, Ann. Bot. 
2:71. 1806.) 
1808. Nymphozanthus L. C. Richard, Démonstr. Bot. 63-68. Type, Nymphaea 
lutea L. (Misprinted Nymphosanthusy the correct spelling on p. 63 and in 
index.) May, 1808. 
1808 or 1809. Nuphar J. E. Smith in Sibth. Fl. Graec. Prodr. 1: 361. December, 
1808, or early in 1809. Type, Nymphaea lutea L. 
1832. Blephara J. E. Smith, Mem. & Corr. 1:576. (Substitute for Nuphar suggested 
but not adopted.) 
1836. Ropalon Raf. New Fl. N. Amer. 2:17. Type, Nymphaea sagittata Pers. 
1887. Nymphaea Greene, Bull. Torrey Club 14: 177-179. September, 1887; 257- 
258. December, 1887. 
1901. Nymphona Bubani, Fl. Pyr. 3: 259. (Substitute for Nuphar.) Type species, 
Nymphaea lutea L. 
DistrRiBUTION: I’resh-water ponds and sluggish streams (rarely in damp ground 
away from water) of the Holarctic Region from northern Europe and Asia to the 
Mediterranean and Japan and from Alaska and northern Canada to Cuba and north- 
eastern Mexico. 
DescripTion: Perennial aquatics with stout, creeping rootstocks; leaf blades 
entire, with a deep sinus at the base, narrowly lanceolate to orbicular, floating or 
emersed, on slender or stout, cylindric or flattened petioles; submersed leaves often 
present, these thin and delicate; sepals 5 to 12, orbicular to oblong or spatulate, con- 
cave, greenish, tinged with yellow or red; petals numerous, linear to oblong, thick, 
stamen-like or scale-like, inserted with the very numerous stamens on the receptacle 
under the ovary; stigma disk-like, with few to many rays; fruit ovoid to columnar, 
usually ripening above the water; seeds mostly ovoid, yellow or brown, smooth and 
shining, numerous. 
The Old World forms of Nymphaea are so imperfectly known that it is impossible 
to make any satisfactory estimate of the number of species in the genus. The Old 
World species are recognized by Engler and Prantl as about five. Half a dozen 
1 Proc. Biol. Soc. Washington 15:18. February 18, 1902. 
