540 NYMPHAEACEAE 
or cup-like at the center. Flowers erect. 
Mam and petals Bigs gradually into 
other. Stam erous, deciduous 
see acorn-like, ee in the top of the 
receptacle.—Three aaa the following 
and two in the Old World—The flowers and 
leaves are elevated ki the water, the lat- 
ter are not evergreen. 
1. N. lutea (Willd.) Pers. Leaf-blades 
elevated on es petioles, or floating, orbicu- 
lar, 3-6 dm. in diameter, the edges turned 
upward: Peu cs 1-2 m . tall: corolla pale- 
.0 dm. wide: appenda 
, tael 
7—10 em. wide: nuts 10-12 mm. n diameter — (Duc ACORN. LOTUS. M 
CHINQUAPIN.  WATER-NUT. YO - APIN, ALLIGATOR-BUTTONS.  CAN-DOCK.)— 
Ponds, lakes, ee cdd streams, Coastal Plain PET isolated localities in M eT 
pro vinces, Fla. ebr., Minn., Ont., and Mass.—Sum.—tThe fruits were 
x 
used as food by the eens 
Famity 8. NYMPHAEACEAE — WATER-LILY FAMILY 
Aquatic plants with stout horizontal rootstocks. Leaves with erect or 
floating blades. Flower terminating a long scape. Calyx o sepals. 
0 
ous stamens. Gynoecium of 6-36 united carpels, the stigmas radiate on 
a disk. Fruit baccate.—Five genera and about 45 species, widely dis- 
iibuledi in fresh water. "d as ition to emersed and floating leaves es 
are sometimes submersed o 
Petals small, filament-like: stamens hypogynous: ovary superior. 1. NYMPHAEA. 
Peta ee de t as large as the sepals: stamens epigynous: ovary in- 
fer 2. CASTALIA. 
1. NYMPHAEA [Tourn.] L. Plants with erect or pea mend blades 
and yellow ihe Leaf-blades not peltate, with a deep sin the bas 
Sepals 5 or 6, concave, i n Petals numerous, uu MN TA bom, 
with the stamens, under the ovary. Berry smooth, maturing abov pm 
About 12 species, natives of the north temperate Pn SA DOCKS. 
SPATTER-DOCKS. BONNETS. COW-LILIES. YELLOW POND-LILIES. 
Leaf-blades more than twice as long as wide, the sinus less than one-fourth the length 
of the blade. I. SAGITTIFOLIAE. 
Leaf-blades less than twice as long as wide, the sinus one- 
fourth to one-half the length of the blade. 
Leaf blades glabrous beneat II. ADVENAE. 
Leaf-blades pubescent beneath. III. ORBICULATAE. 
SAGITTIFOLIAE 
Leaf-blades over thrice as long as Wide, the sinus open: stigma- 
rays linear 1. N. sagittifolia. 
Leaf-blades a than thrice as long as wide, the sinus closed: 
stigma-rays elliptic. 2. N. ulvacea. 
e 
II. ADV 
Leaf-blades of an orbicular or ovate- Rn n nm . N. fluviatilis. 
Leaf-blades markedly longer than wide. 
Sepals and leaf-blades very thin: submersed leaves present. 4. N. chartacea. 
