NY.Airil^ACIwK. (WATEU-I.ILY I'AMILY.) 19 



Inside. Pitals 3-4, •wlthcrmg-pcrsistent.^ Stamens 6-18 : anthers ad- 

 iiate, c'xtrorjc. Ovaries 2-18. Ovules suspended. Capsule indehisccnt, 

 1-3-seeueJ. Embr\o minute, at the base of lleshy albumen. 



1. CABOMBA, Aublct. 



Sepals and petals 3. Stamens 6. Ovaries 2-4. Capsule 1 - S-scederl. — 

 Stems filiform, branching. Submerged leaves opposite, divided into numerous 

 filiform (hittcncd segments ; floating ones peltate, entire. Flowers small, in tiie 

 axils of the floating leaves. 



1. C. Caroliniana, Gray. Floating leaves oWong-Iincar ; flowers wlnte. 

 ("eetris acpiatica, Nutt.) — Ponds and stUl water, Florida to >v'ortli Carolina, and 

 westward. June - August. — Stems 2° - 4° long. 



2. BJIASENIA, Schreber. Water-shield. 



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

 antliers cxserted. Ovaries 4-18. Capsule 1-2-secdcd. — Leaves all peltate 

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

 peduncles, dull purj)le. 



1. B. pcltata, Pursh. (Ilydropcltis purpurea, jV/c/ix.) — Ponds and slow- 

 flowing stream;:, Ilorida and northward. July. — Stem, petioles, and lower 

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

 wide. 



OuDKU 8. NYMPHy'EACEiE. (Watkk-Lily Family.) 



Aquatic licrbs, witli peltate or cordate, entire, floating leaves, and soli- 

 tar)' white or yellow flowers on long peduncles. Sepals 4 - G, colored 

 inside. Petals numerous, hypogynous 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 in a sac at the extremity of farinaceous 

 albumen. 



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



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

 envelops tlie ovary, the inner ones passing hito stamens. Stamens numerous, 

 inserted above tlic petals, the outer ones petaldikc : anthers adnatc, introrse. 

 Ovary many-celled. Stigmas as many as the 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. "N. odorata, Ait. (Poxd-Lily.) Phizoma large, creeping; leaves 

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



