30 SARRACENIACE^E. castalia. 



CHRYSAMPHORA. 



N. advena Ait. Hort. Kew. ii. 226; Nuphar advena , Ait. f. Leaves 

 floating or emersed and erect, on stout and half cylindrical petioles, deeply 

 cordate 6-8 inches in diameter : flowers two inches in diameter : sepals usu- 

 ally 6, unequal: petals narrowly oblong, thick and fleshy, truncate shorter 

 than the stamens: anthers longer than the filame nts: stigmal2-24-rayed, 

 the margin entire or repand: fruit strongly furrowed, OToid-oblong. (In 

 subalpine ponds about Mount Hood), Oregon to Alaska thence eastward 

 across the continent. 



N. polysepala Greene Bull Torr. Ciub, xv, 84. Nuphar polysepalum 

 i\ngelm. Trans. Acad. St. Louis, ii, 282. Resembling the last but larger: 

 leaves all floating, 8-14 inches in diameter : flowers fragrant, 2-5 inches in 

 diameter: sepals 8-12, unequal: petals 11-18. dilated and unlike the stam- 

 ens, yellow: fruit globose, 1-2 inches loDg. In ponds, British Columbia to 

 California. 



CASTALIA Salisb. Parad. Lond. 14. 



Perennial acaulescent herbs with thick creeping or tuberous 

 rootstocks, rounded cordate leaves and snow white or pink 

 flowers blooming all summer. Sepals 4, plain, hypogynous, her- 

 baceous on the outer and somewhat colored on the inner face. 

 Petals plain, those of the outermost row of ten greenish outside, 

 all oblong or lanceolate, imbricated over and their bases ad- 

 nate to the surface of the 7-35-eelled ovary: innermost reduced 

 to staminodes or imperfect stamens with petaloid filaments. 

 True stamens with narrow filaments and linear-oblong anthers, 

 inserted around the broad summit of the ovarv. Ovary con- 

 cave and umbonate, lineate with as many radiate stigmatic 

 lines as there are carpels, the tips of the latter produced into 

 as many incurved short processes. Surface of the spongy-bac- 

 cate fruit bearing the basis of the decaying stamens or their 

 scars. Seeds enclosed in cellular-membranaceous arillus. 



C. Leibergi Morong Bot. Gaz. xiii, 124 t. 7. Leaves oval with rather 

 open binus and acutish lobes, entire 1K-6 inches long, two-thirds as broad: 

 flowers white 1%-Z inches in diameter when fully expanded: sepals an inch 

 long, uarrow. obtuse: petals in two rows, a little shorter and more obtuse 

 than the sepals: stamens in 3-4 rows running up the ovary more than half 

 way: stigmatic rays 7 or 8, the projecting points very short and blunt. In 

 smalt ponds, northern Idaho. 



Order IV. SARKACENIACEJE Endl. Gen. 901. 



Bog plants with pitcher-shaped or tubular and hooded 

 leaves, and perfect, polyandrous hypogynous flowers. The 

 persistent sepals, petals and cells of the ovary each 5. Fruit 

 a many-seeded capsule. Embryo small, in fleshy albumen. 

 CHRYSAMPHORA Greene Pitt, ii, 191. 

 DARLINGTONIA Torr. Smith, contrib. vi, 4. t. 12. 



Calyx without bracts, of 5 imbricated narrowly oblong sepals. 

 Petals 5, ovate oblong with a small ovate tip. Stamens 12-15 in 

 a single row. Filaments subulate. Anthers oblong of 2 unequal 

 cells. Ovary top-shaped, with a broad concave dilated sum- 

 mit, longer than the stamens, 5-celled, the cells opposite the pet- 



