154: FLORA OF TEXAS. 



8. WATER-LILY FAMILY. Order, Nym- 



PHJEACE.E. 



Aquatic herds. Leaves peltate or cordate from a rhi- 

 zome. Sepals, petals, and stamens numerous, imbricated 

 and gradually passing into each other. Anthers adnate, 

 and intorse. Pistils many, and united into a many-celled, 

 many-seeded compound ovary. 



N YMPH^A, Tourn. Water-Lily. 



Sepals 4, green outside. Petals oblong, inserted into tlie 

 thin torus which envelops the ovary, the inner one passing 

 into stamens. Stamens numerous, inserted above the pe- 

 tals, the outer ones petal-like. Anthers adnate, intorse. 

 Ovary many-celled. Stigmas as many as tlie cells, linear, 

 radiating around a globular central gland. Berry globose. 

 Seed enclosed in a membranaceous aril. Leaves orbicular, 

 cleft at the base to the center, floating. Flowers on elon- 

 gated, often spiral peduncles. 



N. ODOR ATA, Ait. (Pond Lily). Rhizoma large, creep- 

 ing; leaves 6-12' wide, entire, the sinus narrow and the 

 lobes acute, or else with an open sinus and obtuse lobes. 

 Ponds and still waters. Mav. 



9. XUPHAE. Order, Yellow AVater-Lily. 



Sepals 5-6, obovate, yellow. Petals 10-20, stamen-like, 

 hyi^ogynous. Stamens numerous, at length recurved, per- 

 sistent. Ovary cylindrical, many-celled. Stigma sessile, 

 circular. Berry oblong. Seeds smooth, without arils. 

 Leaves cordate or sagittate, floating or erect. Floivers 

 yellow, erect. 



X. advexa. Ait. (BoxxETS. Spatter-dock). Leaves 

 thickish cordate, smooth or downy beneath, often emersed 



