‘ 
TRIANDRIA. MONOGYNTA. 29 
spathulate, 1 or more in the same spatha, axillary in Z.. 
gramineus; in all the others, bursting as it were from the 
base of the petiole. Flowers extremely evanescent, in 
all the species white, except the J. gramineus, which ap- 
pears to be scarcely of the same genus, all the others 
appertain to Heteranthera, and the ZL. gramineus is now 
ealled Scuottera, being further generically distin- 
guished by having a capsule of one cell. 2 
Srectes. 1. ovalis, Micu. (spatha 2 or 3-flowered? v. 
v.) Heteranthera limosa of BEAUVOrIs. 2. reniformis, MICH. 
#. acuta of Beauvois. This appears to be the same plant 
with the H. reniformis of the Flora Peruviana.f 3. gra- 
mineus; (now SCHOLLERA graminea.) Found inalmost all 
the rivers of the United States from the Delaware south, 
and in the Ohio, to the west, 
41, STIPULICIDA. Michaux. 
Calix 5-parted, persistent. Corolla 5-petal- 
led, petals entire, and as long as the calix. 
Style short, stigmata 5. Capsule 1-celled, 3- 
valved. Seeds few, each attached to the recep- 
tacle by an umbilical filament. 
A small perennial herb, with a leafless, dichotomous, ar- 
ticulated stem; the base of each branch subtended by 2 
opposite, lacerated stipula. Flowers minute, terminal, al-~ 
most sessile, growing from 3 to 6 together. Radical ~ 
leaves minute, spathulate. 
Speciess. l.setacea. Very nearly allied tothe genus Po- 
lycarpon. 
42. POLYCNEMUM. L. 
Calix 3-leaved. Petals 5 caliciform. Cap- 
_ gule 1-seeded, membranaceous, not opening. co- 
vered by the calix. (Stamina 1, 2, 3, and 5.) 
Stem herbaceous, branching, diffuse, leaves crowded, 
linear, subulate, or filiform, and carnose; flowers ealicine, 
+ The leaf buds-of this species are large and involute, including 
an extraordinary quantity of embryon foliage, enveloped like | 
the Bracenia in a gelatinous fluid. Itis also extremely local; 
in Pennsylvania it is scarcely known beyond the vicinity of Phie _ 
ladelpbia, and is not noticed by Mr. Elliot as existing in the 
Southern states. se : oe 4 
