44 



XYMPHAEACEAE. 



[VOL. II. 



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



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

 Sepals 4. Petals oo , imbricated in many rows, inserted on the ovary, gradually passing into 

 stamens; stamens =c , the exterior with large petaloid filaments and short anthers, the interior 

 with linear filaments and elongated anthers. Carpels cc , 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 25 species, of wide geographic distribution. 



Flowers 3' -5%' broad, fragrant; leaves orbicular, purplish beneath. i. C. odorala. 



Flowers 4' -9' broad, not fragrant; leaves orbicular, green both sides. 2. C. tuberosa. 



Flowers I'-i'A' broad, not fragrant; leaves oval. 3. C. tctragona. 



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



Lily. Pond Lily. Water Nymph. Water Cabbage. (Fig. 1531.) 



Xymphaea odorata Dryand. in Ait.Hort. 



Kew. 2: 227. 1789. 

 Castalia pudica Salisb. in Konig & 



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

 Castalia odorala Woodv. & Wood in 



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

 Xvniphaea odorata var. minor Sims, 



Bot. Mag. pi. 1652. 1814. 



Rootstock thick, simple or with 

 few branches. Leaves floating, orbi- 

 cular 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 tinged with pink, $'-$%' broad, del- 

 iciously fragrant; petals numerous, 

 in many rows, narrowly oblong, ob- 

 tuse; fruit globose, or slightly de- 

 pressed; seeds stipitate, oblong, 

 shorter than the aril. 



In ponds and slow streams. Nova So 

 tia to Manitoba, south to Florida and 

 Louisiana. June- Sept. 



Castalia odorata rdsea (Pursh) Britton, Mem. Torr. Club, 5: 154. 

 Nymphaea odorata var. rosea Pursh, Fl. Am. Sept. 369. 1814. 



Flowers large, deep pink or red. Eastern Massachusetts to New Jersey, near the coast. 



2. Castalia tuberdsa ( Paine) Greene. Tuberous White Water Lily. (Fig. 1532.) 



\\mphaea tuberosa Paine, Cat. I'l. 



Oneida Co., N. Y. 132. 1865. 

 Castalia tuberosa Greene, Bull. Torr. 



Club, 15: 84. 1888. 



Rootstock thick, with numerous 

 lateral tuberous-thickened branches, 

 which become detached and propa- 

 gate the plant. Leaves orbicular, 5'- 

 12' in diameter, floating, sometimes 

 slightly pubescent beneath, green both 

 sides, the veins very prominent on the 

 lower surface; sinus open or closed; 

 petioles stout; flowers pure white, 4'- 

 9' broad, inodorous or very slightly 

 scented; petals oblong, in many rows, 

 broader than those of C. odorala, ob- 

 tuse; fruit depressed-globose ; seeds, 

 globose-ovoid, sessile, longer than or 

 about equalling the aril. 



Lake Champlain, west through the 

 Great Lakes to Michigan, south to Tren- 

 ton, X. J., Meadville, Pa., and eastern 

 Nebraska. Summer. Nymphaea reni- 

 formis Walt, of the southern Atlantic 

 States is clearly a different species. 



1894- 



