tg4 
rigidius, 
lineare . 
longifolium, 
pusillum. 
trifoliatum. 
i 
marginatum. 
carolinemis. 
FENTANDRIA BIGYNIA. 
244. SIUM. Gen. pl. 480. 
1. S. foliis pinnatis, foliolis lanceolatis integerrimis vel su- 
perne dentatis. Willd. sp. pl. 1. p. 1433. 
In wet meadows : Pensylvania to Virginia. % . July, 
Aug. v.v. Flowers small. This and the following 
are considered very poisonous plants, especially in re- 
spect to horned cattle ; and every farmer who knows 
their bad qualities is busily employed to destroy them, 
2. S. foliis pinnatis, foliolis longis sublanceolato-linearibus 
remotiuscule serratis, involucro oligophyilo, involu- 
cellis linearibus polyphyllis, umbella breviter radiata. 
Midi . fl. amer. \ . p.\ 6j. 
S. suave. Walt. fi. car. 1 15. 
In wet meadows and along ditches : Canada to Pensyl- 
vania. % . July. v. v. 
3. S. foliis pinnatis, foliolis inferioribus longissimis falcato- 
linearibus rariter dentatis, caule oligophyilo superne 
nudo, umbellis subgeminis nudiusculis. 
In ditches and bogs : New Jersey. 1/ . Aug. v. v . . 
Very slender. 
244. b. SISON. Gen.pl. 481. 
1. S. foliis biternatim multipartitis, umbellulis 3 —5 -floris, 
seminibus scaberulis. Mich.fi. amer. 1 . p. 108. 
Daucus divaricatus. Walt. fl. car. 114. 
In dry sandy fields : Cardina. 0. April, May. v. s. 
2. S. foliis omnibus trifoliatis, foliolis dentatis, inferioribus 
ovalibus 2-3 -lobis, superioribus ovali-lanceolatis, um- 
bella terminali solitaria pedunculata, seminibus sub- 
rotundis. Midi. fl. amer. 1. p. 168. 
In Upper Cardina. Michaux. -f . 
3. S. foliis pinnatis, superioribus quinatis, foliolis omnibus 
sessilibus lanceolatis integerrimis albido-marginatis, 
involucro involucellisque nullis. Mich. fl. amer. 1 
p. 168. 
In wet meadows : Virginia to Carolina. % . July, Aug. 
v. v . 
245. OENANTHE. Gen.pl. 484. 
1. O. foliis omnibus simplicibus filiformibus. Walt. fi. 
car. 113. 
South Cardina. Walter, . 
