HORNWORT FAMILY 243 
9 to 12 rayed. Intermediate between 1 and 3. Ponds, northern New 
York. May-Sept. 
3. N. microphylla. Pers. (Fig. 3, pl. 42.) Smart YrLttow Ponp 
Lity. (N. Kalmiana, Sims.) Leaves 2 to 4 in. long, % as broad, some 
leaves submersed. Flowers smaller than No. 1 or 2. Sepals 5. Lakes and 
ponds in our area. 
3. CASTALIA, Salisb. 
Aquatic herbs with showy white flowers. Sepals 4. Petals many, 
graduating into stamens. Stamens many. Petals and stamens arising 
from surface of the rounded seed casket. 
1. C. odorata, (Dryand.) Woodv. and Wood. (Fig. 1, pl. 42.) 
SWEET-6CENTED WHITE WATER Lity. (Nymphaea odorata, Ait.) Leaves 
orbicular with a deep narrow sinus, 4 to 12 in. in diameter. Flowers 
white or tinged with pink, perfume adundant but pleasing. Ponds and 
slow streams. June-Sept. 
2. C. tuberosa, (Paine.) Greene. TuBEROUS WHITE WATER LILy. 
Similar to No. 1, but without or nearly without perfume. Lake Cham- 
plain and other northern lakes and ponds. 
4. NELUMBO, (Tourn.) Adams 
Resembling Castalia, but leaves with foot-stalks at or very near the 
center and with petals and stamens arising below the seed casket, which 
is in form of an inverted cone. The upper surface shows a number of 
pits in which the seed carpels are lodged. 
1. N. lutea, (Willd.) Pers. (Fig. 6, pl. 42.) American Lotus. 
Leaves prominently ribbed. Plant and flower resembling Castalia, but 
the petals are less uniform and the knobbed upper surface of the seed 
casket is conspicuous in the midst of them. In Connecticut River and 
in Jakes in southern New Jersey. Also in Sodus Bay, N. Y. 
2. N. nucifera, Gaertn. InpIAN Lotus. (N. Nelumbo, (L.) Karst.) 
Leaves rounded, standing above the surface of the water or floating, 2 to 
3 ft. in diameter, the leaf-stalks 3 ft. or more in length. Flowers pink 
or white, 4 to 10 in. broad on flower stems 3 to 6 ft. high. Introduced 
into this country by Mr. Edmund D. Sturtevant. Now naturalized at 
Bordentown, N. J. Cultivated in many parks. July-Aug. 
Famity IJ.—CERATOPHYLLACEAE. Hornwort Famity 
Submersed aquatics with finely dissected leaves in whorls. 
Staminate and pistillate flowers separate, on the same or on dif- 
ferent plants. Staminate flowers with numerous stamens sur- 
rounded by an 8 to 12 parted colorless perianth, as is the pistil 
in the pistillate flower. 
CERATOPHYLLUM, L. 
Herbs growing under water in ponds and other quiet waters, Leaves 
very finely dissected. 
C. demersum, L. (Fig. 5, pl. 42.) Hornworrt. Stems 2 to 8 ft. 
