30 SARRACENIACEZ. ' CASTALIA. 
: CHRYSAMPHORA. 
N. advena Ait. Hort. Kew. ii. 226; Nuphar advena, Ait. f. Leayes 
floating or emersed and erect. on stout and half cylindrical petioles, deeply 
cordate 6-8 inches in diameter: flowers two inchesin 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, ovoid-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 
ringelm. 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 long. 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 bloomingallsummer. Sepals 4, plain, hypogynous, her- 
baceous on the outer and somewhat colored on the inner face. 
Petals plain, those of the outermost row often greenish outside, 
all oblong or lanceolate, imbricated over and their bases ad- 
nate to the surface of the 7-35-celled 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 
linesas 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, 124t.7. Leaves oval with rather 
open sinus and acutish lobes, entire 144-6 inches long, two-thirds as broad: 
flowers white 145-2 inches in diameter when fully expanded: sepals an inch 
long, narrow. obtuse: petals in two rows, a littte shorter and more obtuse 
than the sepals: stamens in 3-4 rows running up the ovary more than half 
wuy: stigmatic rays 7 or 8, the projecting points very short and blunt. In 
smali ponds, northern Idaho. . 
OrvER IV, SARRACENIACEA Endl. Gen. 901. 
Bog plants with pitcher-skaped 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 asmall ovate tip. Stamens 12-15 in 
asinglerow. Filamentssubulate. 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- 
