NYMl'lI.EACE.K. (WATER-LILY FAMILY.) 19 



inside. Petals 3-4, witlicring-pcrsistent. Stamens 6-18 : aiifhci"s ad- 

 natc, extrorse. Ovaries 2- 18. Ovules sus[)en(led. Capsule indehisccut, 

 1— 3-seeded. Embno minute, at the base of lleshy albumen. 



1. CABOMBA, Aublct. 



Sep.als and petals." Stamens 6. Ovaries 2-4. Capsule 1-3-secdcd. — 

 Stems filiform, branching. Sul)mcrged leaves opposite, divided into numerous 

 filiform flattened segments ; floating ones peltate, entire. Flowers small, in tlie 

 uxils of the floating leaves. 



1. C. Caroliniana, Gray. Floating leaves ohlongdinear ; flowers white. 

 (Nectris aquatiea, Null.) — Ponds and still water, Florida to North Carolina, and 

 westward. June -August. — Stems £°-4°long. 



2. BRASEWIA, Sclireber. Water-shield. 



Sepals 3-4, purple inside. Petals 3-4, linear, persistent. Stamens 12-18: 

 anthers cxsertcd. Ovaries 4-18. Capsule 1-2-seeded. — Leaves all peltate 

 and entire, alternate, oval, on long jietiolcs. Flowers axillary, on elongated 

 peduncles, dull ])uri)le. 



1. B. peltata, Pursh. (Ilydropcltis purpurea, J/icA-r.) — Ponds and slow- 

 flowing streanrs, Florida and northward. July. — Stem, petioles, and lower 

 surface of the leaves coated with a gelatinous, viscid exudation. Leaves 2' -3' 

 wide. 



Order 8. NYMPII.^ACEiE. (Water-Lily Family.) 



Afjuatic herbs, with peltate or cordate, entire, floating leaves, and soli- 

 tary white or yellow flowers on long peduncles. Sepals 4-G, colored 

 inside. Petals numerous, h}-pogynous or perigynous, imbricated in the 

 bud. Stamens numerous. Ovary many-celled. Ovules numerous, in- 

 serted on the partitions. Stigmas radiate or peltate. Fruit baccate, 

 many-seeded. Embryo included ia a sac at the e.\.tremity of farinaceous 

 albumen. 



1. ITYMPH^A, Tourn. Water-Lily. 



Sepals 4, green outside. Petals oblong, inserted into the thin torus which 

 envelops the ovary, the inner ones passing into stamens. Stamens numerous, 

 inserted above the petals, the outer ones petaldike : anthers adnate, introrse. 

 Ovary many-celled. Stigmas as many as tiic cells, linear, radiating around a 

 globular central gland. Berry globose. Seed enclosed in a membranaceous 

 aril. — Leaves orbicular, cleft at the base to the centre, floating. Flowers on 

 elongated, often spiral peduncles. 



1. IT. odorata. Ait. (Pond-Lily.) Rhizoma large, creeping; leaves 

 6'- 12' wide, entire, the sinus narrow and the lobes acute, or else with an open 



