M0N0CQTYLES, 
75 
incurved. Style filiform, stigma simple. Fruit 
a single oblong seed covered by the marcescent 
6 ribbed perigone, perisperm farinaceous, em- 
bryo fleshy central terete. Aquatic plants , 
roots fleshy creeping , leaves radical petiolate, 
stein unifoliate articulate , spadix terminal 
spicate with a vaginal spat ha below the base , 
floivers blue.— Thus quite a natural Genus, 
widely different from Pontederia and the akin 
Genera Kadakia, Carigola, Gomphima, Piaro- 
pus, Lunania or Endolimna see my flora tell. 
This forms the type of a peculiar family Unis- 
emides 1815 near to Aroides and Typhacea, 
the spike is a real spadix. I have given a long 
history of this G. in my Medical flora. 
416. Unisema deltifolia Raf. m. fl. fig. 93. 
Radical leaves oblong deltoid obtuse, base acute 
or truncate, stem leaf subsessile similar undu- 
late base subreniform ; spike terete, peduncle 
subequal to spatha, segments of flowers oval 
obtuse— in West Kentucky, Tennessee, Ala- 
bama and Florida. Stem 3 feet, leaves 5 to 8 
inches long, spke 3 inches. 
417. Unisema peduncularxs Raf. purshiana? 
Raf. m. fl. (angustifolia ? Pursh) This differs 
from last by leaves truncate or subcordate the 
stem leaf on a long petiol, the peduncle of the 
spike twice or thrice as long as the spatha, seg- 
ments of flower linear lanceolate — Carolina to 
Florida. Spike shorter hardly 2 inches. Var. 
parvifolia , leaves 3 or 4 inches long only, spike 
only one inch, peduncle and petiols not quite so 
long. My specimens of both have all obtuse 
leaves, none are acute. 
418. Unisema media Raf. m. fl. 3. Leaves 
oblong cordate obtuse consimilar, spike terete 
peduncle longer than spatha, segments oblong 
