54 
TETRAD YNAMIA, SILIQUOSA. 
heterophyiia. 2. D. Stem 2-leaved, leaves ternate, petiolate, 
leaflets linear, sublanceolate, acute, entire, mar- 
gin asperate, ciliate ; radical leaflets ovate-ob- 
long, incisely and grossly toothed. Obs, The 
smallest species with which I am acquainted. 
Root concatenately , and also simply tuberous, 
tubers oblong, dentoid. One radical leaf always 
present upon a long petiole arising from the base 
of the scape, deeply toothed, dentures obtuse, 
with a small abrupt point 5 cauline leaflets very 
rarely subserrate, generally entire, invariably 
ciliated, nearly linear, more than an inch long, 
and only about 2 lines wide. Corymb small, 
about 9-floweredj flowers pale purple, nearly 
the size of those of Cardamine pratensis, petals 
oblong, entire, longer than the stamina. Flow- 
ering in June. Figure Pluk. Amalth. t. 435 . f. 
2 . ? but in this figure the leaves are a little 
toothed. — d^utt. 
D. heterophyiia, Nutt. 
In the shady fir woods on the banks of the Wissahickon ; 
Mr. Nuttall. I have not met with it. 
300. BARBAREA. R. Brown. ( Criiciferae.) 
Silique 4)-sided-ancipital. Cotyledones ac- 
cumbent. Seeds in a single series. Calix 
erect. Glands disposed at the internal base 
of the shorter filaments. — Brown. 
Hort. Kew. 4. p. 109. 
vulgaris. B leaves lyrately pinnatifid ,* stem branched 
flowers yellow, terminally racemose. — JV’ m#. 
Barbarea vulgaris, R. Brown. 
Erysimum Barbarea, L. 
Water Cress. 
From fifteen inches to two feet high, bearing a profusion of 
elegant flowers. The plant is eaten in its young state at our 
tables as a sallad, under the above English name. On the 
