NYMPHAEACEAE. [Vou II. 
2. Nelumbo Nelumbo (L.) Karst. 
Indian Lotus. (Fig. 1535.) 
Nymphaea Nelumbo J. Sp. Pl. 511. 1753. 
Nelumbo nucifera Gaertn. Fruct. & Sem. 1: 
73. pl.zg9. 1788. 
Nelumbium speciosum Willd. Sp. Pl. 2: 1258. 
1799. 
Nelumbo Nelumbo Karst. Deutsch. Fl. 553. 
1880-83. 
Leaves 2°-3° in diameter, high exserted 
above the water or some of them floating, 
thin, concave, glaucous; petioles and pe- 
duncles 3°-6° long, glabrous or with scat- 
tered minute prickles; flowers 4’—10’ broad, 
pink or sometimes white; petals oblong or 
elliptic, obtuse; fruit obconic, 4/-5’ long, 
3/-4’ in diameter; seeds oblong or ovoid. 
Naturalized in ponds about Bordentown, N. 
J., where it was introduced by Mr. E. D. Sturte- 
vant. Native of India, Persia, China, Japan and 
Australia. A superb plant, often cultivated. 
y \ Se July-Aug. 
Family 23. CERATOPHYLLACEAE A. Gray, Ann. Lyc. N. Y. 4: 41. 
1837. 
HoRNWORT FAMILY. 
Submerged aquatics, with slender widely branching stems, and verticillate 
leaves, the monoecious or dioecious flowers solitary and sessile in the axils. 
Perianth many-parted, the segments entire or toothed. Stamens numerous, 
crowded on a flat or convex receptacle; anthers sessile or nearly so, linear- 
oblong, extrorse, the connective prolonged into a thick appendage beyond the 
sacs. Pistillate flowers with a superior 1-celled ovary; ovule 1, orthotropous, 
pendulous; style filiform, stigmatic at the summit. Fruit an indehiscent nut or 
achene. Endosperm none; embryo composed of 4 verticillate cotyledons, with 
a short hypocotyl and a plumule of several nodes and leaves. 
The family contains only the following genus. 
1. CERATOPHYLLUM L,. Sp. Pl. 992. 1753. 
Leaves crowded in verticils, linear or filiform, spinulose-serrulate, forked. Sterile flowers 
with 10-20 stamens, the anthers about as long as the perianth. Fertile and sterile flowers 
generally at different nodes, but sometimes in opposite axils at the same node. Ovary and 
fruit somewhat longer than the perianth, the fruit beaked with the long persistent style. 
One or possibly two species, widely distributed 
in fresh water. \ Hf WE 
, Yee 
1. Ceratophyllum demérsum L, \ W Vile 
pa \W7 Ve 
Hornwort. (Fig. 1536.) \\} Wipe 
Ceratophyllum demersum Y,. Sp. Pl. 992. 1753. ( iff 1) FZ 
Stems 2°-8° long, according to the depth of 
water. Leaves in verticils of 5’s—12’s, linear, 
2-3 times forked, the end of the segments capil- Ca Se 
lary and rigid, 4’’-12’’ long; ripe fruit oval, 2’/- @ 
| 
3’ long with a straight or curved spine-like ye 
beak 2’’-4’’ long, smooth and spurless or with a CoS ‘Zags 
long basal spur on each side, or tuberculate and OW 7 
with narrowly winged spiny margins or broadly N\ \) 1/, 
Wks 
winged without spines. / DEX 
In ponds and slow streams, throughout North \} (LK 
America except the extreme north. Several species 
and varieties have been proposed, based on the 
spurs, spines or wings of the fruit, but none of them 
seem to be of any value. June-July. 
