P ACEAE 267 
Spike densely flowered : perianth mE at least when young: fruits n or oblong 
in outline, about twice as long a 1. ordata. 
Spike loosely flowered : pd EQUIP and sometimes also 
Et at least when young: fruits subglobose in outline, 
early or quite as wide "i none. 2. P. lanceolata. 
1. P. cordata L. Basal leaves erect, but not very rigid, the tissues soft; blades 
broadly ovate to deltoid-ovate and cordate at the base, varying to narrowly 
l nd truncate or 
bogs, and lakes, various provinces, N Fla. to 
Okla., Ont, and N. S.—$Spr.-fall or all 
year S. 
2. P. lanceolata Nutt. Basal leaves stiffly 
erect; blades lanceolate "e vi ema 
t the bas 
and narrowed or rounde e, vary- 
ing to deltoid or ovate and eri sub- 
cordate, or deeply cordate; e m leaves 
i r tot S 
5-6 
ce ino stagnant 2 Coastal Plain Fla. to Tex 
or all year S.—In pure growth the spikes of this a of the preceding species 
make a brilliant show in the landscape. 
4, PIAROPUS Raf. Aquatic herbs. Leaf-blades cea sometimes with 
inflated petioles. Spadix few-flowered. Perianth somewhat 2-lipped, the 
lobes unequal. nthers erect. Ovary 3-celled. Seeds many.—Five species, 
mostly natives of South Ameriea.—W ATER-HYACINTHS. 
Me orbicular to reniform: flowers in a spike or spike-like pu perianth 
r 9 em. wide. 1. P. crassipes. 
Leaf-blades ate. flowers in an open panicle: perianth less than 
2.5 em. wide. 2. P. paniculatus. 
1. P. crassipes (Mart.) Britton. Plants 1-12 dm. tall: leaves with inflated 
petioles and mainly orbicular to reniform blades 3-15 cm. broad: perianth 
bluish-purple; tube 1.5-2 em. long; limb 4—7.5 em. broad, the lobes longer than 
the tube- (Wampr-srrACINTI. RIVER-RAPT. WAMPEE EE.)— Str eams, lakes, ponds, 
e ara Coastal Plain, Ga. and Fla. 
t In part, at ws Dowd from 
cultivation — (W7 IL., 
may cover several squar feet o any 
acres of w s Ek is the most pv 
especially e of our water plants. 
The ae aa brilliant torches dies in 
a sea of E Li Paus is & unique 
sight. Wheth an immi- 
grant from tropical dos cannot be 
certainly dete owever, its 
growth in the ae cf the rather recently opened up e of the in- 
terior of peninsular Florida indieates that it was native ther 
