3 

Ce ee Ore 
ADDENDA. 
Pennsylvania Water Cress. 
From six inches to a foot high. Flowers white, small. 
Whole plant peperish. In low meadow-grounds, and near 
rivulets and springs; common. Perennial. May. 
re 
DIADELPHIA, DECANDRIA. 
To genus Lathyrus, No. $14. vol. 2. page 72, 
add the following species : 
No. 2. Lathyrus venosus; stem naked, four-an- 
- gled: stipules semi-sagittate, ovate, acuminate ; 
folioles very numerous, nearly alternate, ovate, 
obtuse, mucronate, veined; peduncles shorter 
than the leaf, 5-10 flowered.— Willd. and Pursh. 
Flowers purple. Perennial. July. Within the limits of this 
_ work; Mr. Collins. 
a 
‘Yo Andromeda paniculata. add the following 
synonym: 
Andromeda ligustrina, Mull. Cat. 2d ed. 
Vaccinium ligustrinum, L. 
—$— 
SYNGENESIA, ZQUALIS. 
To genus Cnicus, No. 306. p. 94. vol. 2, add the 
following species: 
5. Cnicus arvensis ; leaves sessile, pinnatifid, some- 
what smooth, ciliate, very spinous ; stem panicu- 
late; calices ovate, mucronate; scales broad- 
lanceolate, adpressed, woolly on the margin.— 
 Pursh. 
Carduus arvensis, Smith. 
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