GENUS i. 



WATER LILY FAMILY. 



3. Nymphaea sagittaefolia Walt. Arrow-leaved 

 Pond Lily. Fig. 1841. 



Nymphaea sagittaefolia Walt. Fl. Car. 155. 1788. 

 Nuphar sagittaefolia Pursh, Fl. Am. Sept. 370. 1814. 



Floating leaves narrowly ovate or ovate-lanceolate, gla- 

 brous, obtuse, 8'-i5' long, 2'-$' wide; submerged ones 

 numerous, similar, but membranous and commonly larger ; 

 ilowers yellow, about i' broad; sepals 5; petals broadened 

 above, 3" long ; stamens in 4 or 5 rows, the filaments about 

 equalling the anthers; stigmatic disk crenate, n-iS-rayed; 

 fruit ovoid, not constricted into a neck, about i' long. 



Tn ponds and streams, eastern North Carolina and South 

 Carolina. Recorded as occurring- in ponds (now drained) in 

 southern Indiana and Illinois. Plants of the Gulf States for- 

 merly referred to this species prove to be distinct. Alligator- 

 bonnets. Summer. 



2. CASTALIA Salisb. in Konig & Sims, Ann. Bot. 2: 71. 1805. 



Aquatic herbs, with horizontal perennial rootstocks, floating leaves and showy flowers. 

 Sepals 4. Petals co, imbricated in few to many series, inserted on the ovary, gradually pass- 

 ing into stamens; stamens o, the exterior with large petaloid filaments and short anthers, 

 the interior with linear filaments and elongated anthers. Carpels *>, united into a compound 

 pistil with radiating linear projecting stigmas. Fruit globose, covered with the bases of the 

 petals, ripening under water. [A spring of Parnassus.] 



About 40 species, of wide geographic distribution. Type species : Castalia pudica Salisb. 



Flowers s'-S^' broad, fragrant; leaves orbicular to reniform, purplish beneath. i. C.odorata. 



Flowers 4'-g' broad, not fragrant ; leaves orbicular, green both sides. 2. C. tuberosa. 



Flowers \'-\ l /2 r broad not fragrant; leaves oval. 3. C.tetragona. 



i. Castalia odorata (Dryand.) Woodv. & Wood. Sweet-scented White Water 

 Lily. Pond Lily. Water Nymph. Water Cabbage. Fig. 1842. 



Nymphaea odorata Dryand. in Ait. Hort. 



Kew. 2 : 227. 1789. 

 Castalia pudica Salisb. in Konig. & 



Sims, Ann. Bot. 2: 72. 1805. 

 Castalia odorata Woodv. & Wood in 



Rees' Cyclop. 6: no. i. 1806. 

 Nymphaea odorata var. minor Sims, 



Bot. Mag. pi, 1652. 1814. 

 Nymphaea odorata var. rosea Pursh, Fl. 



Am. Sept. 369. 1814. 



Rootstock thick, simple or with 

 few branches. Leaves floating, orbic- 

 ular or nearly so, 4'-i2' in diameter, 

 glabrous, green and shining above, 

 purple and more or less pubescent 

 beneath, cordate-cleft or reniform, 

 the sinus open but sometimes narrow ; 

 petioles and peduncles slender, with 

 4 main air-channels; flowers white, 

 or sometimes pink, 3'-6' broad, fra- 

 grant ; petals numerous, in many 

 rows, narrowly oblong, obtuse ; fruit 

 globose, or slightly depressed ; seeds 

 stipitate, oblong, shorter than the aril. 



In ponds and slow streams, Newfoundland to Manitoba, south to Florida. Louisiana and Kansas. 

 Toad-lily. June-Sept. 



