LIST OF SEEDS, BULBS, TUBERS, ETC. 131 
HETERANTHERA—Mud Plantain:—Creeping, float- 
ing or submerged low herb, on mud or shallow water, 
with a one few-flowered spathe bursting from the 
sheathing side or base of a petiole. 
A, reniformis :—Connecticut to New Jersey, west to 
Illinois and Eastern Kansas, southward. 
H. limosa:—Virginia to Missouri and Louisiana. 
H. graminea:—New England to North Carolina, 
west to Minnesota and Eastern Kansas. 
Order MAYACE:—Moss-like aquatic plants, 
densely leafy, with narrowly-linear sessile pellucid 
leaves, axillary naked peduncles terminated by a soli- 
tary perfect three-androus flower, herbaceous calyx, 
white corolla, and a three-valved one-celled several 
seeded capsule. 
MAYACA. 
M. Michauxi:—Virginia to Florida and Texas. 
Order GENTIANACEE. 
LIMNANTHEMUM—Floating Heart. 
L. lacunosum:—Shallow water, Maine to Minnesota, 
south to Florida and Louisiana. 
L. trachyspermum:—Ponds and streams, Maryland 
to Virginia, Florida to Texas. 
