137 
dance as to oppress and even extirpate more use-* 
fill vegetables. 
446. Erythrina herbaceaL. On the Mississippi, Mg* 
447. Lathyrus pusillus Mg. N. Sp. (not described.) 
On the Mississippi, flowers purple, blossoming in 
June. 
448. Seshania platycarpa Mg. Flowers red ! On the 
Mississippi, Mg. * 
449. Seshania macrocarpa Mg.—S. platycarpa Fers, 
(and Phaca floridana.)—S. disperma Pursh.—CEs- 
chynomene platycarpa Michaux.—Robinia vesi- 
caria Jacquin. On the Mississippi, flowers yellow, 
Mg. These two species are merely distinguished 
by Mg. in his catalogue, by the colour of the* 
flowers and shape of the pods. 
450. Polygonum aviculare L* 
451. --- coccineum Raf. Foliis ovato-oblongis 
acuminatis, ochreis truncatis glabris ; spica cylin- 
drica, floribus pentandris digynis Raf.—P. bistor^ 
ta, Walter.—P. coccineum, var. terrestre Pursh. 
Very different from the P. amphibium Michaux^ 
which Wildenow has called also P. coccineum r 
and has obtuse leaves. 
452. Brassica washitana Mg. Cat. not described, found 
on the Washita, by Dunbar, flowers red. 
453. Tilia heterophylla Ventenat. On the Mississip¬ 
pi, Pursh. 
454. Podalym alba Wild.—Sophora and Crotaiarm 
alba L. 
455. Ricinus communis L* On the Washita 7 Mg, 
MV* ' 
\ 
