americana, 
lanata, 
communis. 
DICLINIA SEGREGATH. 
I. SEGREGAT E. 
681. VALLISNERIA. Gen. pl. 1491. 
1. V. foliis linearibus, pedunculis masculis femineisque 
rectis. Willd. sp. pl. 4. p. 651. Mich. fl. 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. M. 
d? Aug.—Oct. v. v. This most interesting and 
singular plant I observed in the Delaware, near 
Philadelphia, in 1800; which discovery | commu- 
nicated, accompanied with a drawing and description, 
to Dr. B. S. Barton, of Philadelphia. The economy 
- — of its feecundation is highly interesting to the young 
- student of the sexual system. Michaux and Willde- 
now consider it as specifically distinct from V. spira- 
lis; but I have always considered it only a local va- 
riety, as the peduncles of the female flowers are in 
deep water really spiral, 
682. N AJAS. Willd act. acad. berol. 1798, ^ 85. 
1. N. pusilla, filiformis, laevis; foliis angustissime lineari- 
bus. Mich. fl. amer. 2. p. 220. 
In lakes: Canada, on Lake St John's. Michaux. +. 
683. DIOTIS. Gen. pl. 1423. 
E p. omnibus partibus cano-tomentosa ; ; canle flexuoso, — 
glomerulis spicarum confertissimis. 
On the banks of the Missouri, in open prairies. M. 
Lewis.» h. Aug. Sept. v.s. in Herb. Lewis. Re- 
. sembles Diotis ceratoides, but is distinct at id sight 
by its long eects tomentum. 
684. RICINUS. Gen. P 1464. 
L R. foliis peltatis palmatis, lobis lanceolatis serratis, caule 
herbaceo pruinoso, Ses tribus ne bifidis, 
capsulis echinatis. Willd. sp. pl. 4. p. 564 
Icon. Blackw. t. m 
