124 LIST OF SEEDS, BULBS, TUBERS, ETC. 
triangular, smooth and shining. Wet places and in 
shallow water ; common, especially southward. 
P. acre, H. B. K.—Water Smartweed :—Perennial, 
nearly smooth; stems rooting at the decumbent base, 
2—5° high; leaves larger and longer than in the last, 
taper-pointed ; spikes erect; flowers whitish, sometimes 
flesh-cclor; stamens eight; style mostly three-parted ; 
achene smooth and shining. Wet places; common, 
especially southward. 
IRIDACE (Iris Family). 
Irts, Tourn.—Flower-de-luce. 
I, Versicolor, L.—Larger Blue Flag:—Stem stout, 
angled on one side; leaves sword-shaped (# wide) ; 
ovary obtusely triangular, with the sides flat; flowers 
2$—3 long) short-peduncled; the funnel-form tube 
shorter than the ovary; capsule oblong, turgid with 
rounded angles. Wet places, Newfoundland to Florida, 
west to Minnesota and Arkansas. May, June. 
NYMPHAZACEAL (Water-lily Family). 
Netumeo, Tourn.—Sacred Bean. 
N. Lutea, Pers—Yellow Nelumbo or Water Chin- 
quapin :-—Leaves usually raised high out of the water, 
circular, with the center depressed or cupped, I—2° 
in diameter; flower pale yellow, 5—10 broad; 
anthers tipped with a slender hooked appendage. 
Nelumbium luteum (Willd.). Southern Connecticut 
(probably of Indian introduction) tu Lake Ontario, 
Michigan, Minnesota, Eastern Nebraska and south- 
ward, Illinois and Indiana. Tubers farinaceous and 
edible. Seeds also eatable. Embryo like that of 
Nymphea ona large scale; cotyledons thick and fleshy, 
enclosing a plumule of one or two well-formed young 
leaves enclosed in a delicate stipule-like sheath. 
