(502 
mCLINIA 6EGREGATJE, 
\ 
ainericana, 
\ 
1. SEGREGJT^. 
681. VALLISNERIA, Gen. pi. 1491. 
1. V, foliis linearibus, pedunculis masculis femineisque 
rectis. Willd. sp. pl. p. 651. Mich. JL. amer. 2. 
p. 220. 
At the bottom of muddy and slow-flowing rivers : Mis- 
sissippi and St. John’s, Florida, Michanx. In Os- 
wego river. New Y'ork Delaware, Peusylvania, and 
James’s and Greenbriar rivers, Virginia. Ph. 7/* 
^ ? Aug. -Oct. V. V. This most interesting and 
singular plant I 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, Th^ ceconomy 
of its fcECundation is highly interesting to the young- 
student of the sexual system. Michaux and Willde- 
now consider it as specificallv distinct from V. spirae 
Rs'y but I have always con'-idered it only a local va- 
riety, as the peduncles of the female flowers are in 
deep water really spiral. 
cancidcnsis. 
682, NAJAS. TVilld. act. acad. herol. 1/98, p. 85. 
1. N. pusilla, filiformis, laevis; foliis angustissime lineari- 
bus. Mick.fi. amer. 2. p. 220. 
In lakes : Canada, on Lake St. John’s. Michaux. -}-c 
lanata. 
6S3. DIOTIS. Gen. pi 1423. 
1. D. omnibus partibus cano- tomen tosa ; caule flexuoso^ 
glomerulis spicarum confertissimis. 
On the banks of the Missouri, in open prairies. M. 
Lewis. Vi . Aug. Sept. v. s. in Herb. Lewis. Re- 
sembles Diotis ceratoides, but is distinct at first sight 
by its long woolly tomentum. 
communis. 
684, RICINUS. Gen. pi. 1464. 
1. R, foliis peltatis palmatis, lobis lanceolatis serratis, caule 
herbaceo pruinoso, stigmatibus tribus apice bifidis, 
capsulis echinatis. IFitld. sp. pL 4. p. 564. 
Icon. Blackiv. t. 148. 
