002 - 
americana. 
mnadensis. 
lanata» 
communis. 
BICLINIA SEGREGAT-®. 
I. SEGREGJTJE. 
681 . VALLISNERIA. Gm.pl.UQ\. 
l.V. foliis linearibus, pedanculis masculis femineisqufli 
rectis, IVilld. sp. pi. 4. p. 651. Mich.Ji. amer. 2, 
p. 220. 
At the bottom of muddy and slow-flowing rivers ; Mis- 
sissippi and St. John’s, Florida. Michaux. In Os- 
wego river, New York; Delaware, Pensylvania, and 
James’s and Greenbriar rivers, Virginia. Ph. If-. 
^ ? Aug. - Oct. V. V. This most interesting and 
singular plant 1 observed in the Delaware, near 
Philadelphia, in 1800; which discovery 1 commu- 
nicated, accompanied with a drawing and description, 
to Dr. B. S. Barton, of Philadelphia, The oeconomy 
of its fcEcundation is highly interesting to the young 
Student of the sexual system. Michaux and Willde- 
now consider it as specifically distinct from F. spira* 
lis'j but I have always considered it only a local va- 
riety, as the peduncles of the female flowers are ia 
deep water really spiral. 
082. NAJAS. Willd. act. acad. lerol. 1798, p. 85. 
l.N. pusilla,- filiformis, Isevis ; foliis angustissime lineari- 
bus. Mich.Ji. amer. 2. p. 220. 
In lakes ; Canada, on Lake St. John’s. Michaux. 
683. DIOTIS. Gen. pi 1423. 
1. D. omnibus partibus cano-tomentosa ; caule flexuoso, 
glomerulis spicarum confertissimis. 
On the banks of the Missouri, in open prairies. M. 
Lewis. . Aug. Sept. v. s. in Herh. Lewis. Re- 
sembles Diotis ceraioides, but is distinct at first sight 
by its long woolly tomentum. 
684. PJCINUS. Gew.p/. 1464. 
f. R, foliis peltatis palmatis, lobis lanceolatis serratis, caule 
herbaceo pruinoso, stigmatibus tribus apice bifidiS;, 
capsulis echinatis. JFilld, sp. pi. 4. p. 504. 
Icon, Blacliw. t. 148. 
