68 = TETRADYNAMIA. sTLIQuagss 
binm. Mostly pubescent, calix.and petals more or less. 
yellow, Everywhere abundant on the banks of the Mis- 
souri and Mississippi. 4. vudgare, Persoon (sylvestre. L.} « 
Creeping Water Rocket. Silique declinate, leaves (pseu- 
do) pinnate; leaflets lanceolate, incisely serrate. Lix. On 
the gravelly banks of the Delaware, near Kensington, 
Philadelphia. Introduced? Agrees exactly with S.r J. E. 
Smith’s, very accurate description. Flor. Brit. 2. p. 701. 
“1 have never before seen it in America. 5. * canescens. 
Leaves pseudobipinnate, canescent; segments incisely 
_ toothed, obtuse; petals equal with the calix; silique cla- 
vate, suberect, shorter than the peduncle. Hazes From 
Virginia to Georgia. S- Sophia? Pu. A much smaller 
lant than §. Sophia which it resembles only in habit, and 
- 4m fact approaches nearer apparently to §. albumof Sibe- 
Tia. Leaves about 3 inches long, oblong, sessile, equally 
covered with a whitish pubescence; pinne about 7 pai’ - 
nearly all equal in length, scaicely 1-2 an inch, ultimate 
segments cuneate and arounded, about S-toothed, den- 
tures unequal. Raceme terminal, petals very small, obo- 
vate, pale yellow and about the length of the calix. Si- 
lique linear-oblong, smooth, scarely more than half the 
length of the peduncle, and terminated by a minute 
A genus of more than 60 species principally indigenous 
to Europe, there are also species in Northern Africa and | - 
in the Levant, afew are also found in the southern hemis- 
phere, at the Cape of Good Hope, in India, New Zealand, 
and Terra del Fuego. 
461. ERYSIMUM. L. (Hedge-mustard. Winter 
Silique columnar, 4-sided. Calia closed. 
An heteromorphous and arbitrary genus, artificial, but 
no way natural, including species scarcely distinct from 
Sisymbvium, and Cheiranthus, the only genuine species is 
considered to be E. offcinale. 
Species. 1. E. officinale. Naturalized, but not so very 
_ common, as in England and France. 2. parviflorum. Per- 
Bt (E. Cheiranthoides. L, an unmeaning and yery eX-- 
tionable name which mnigt be apphied to more than _ 
alf of the genus.) Has. On the gravelly banks of the 
Potomac, &c. Virginia, on the banks of the Missouri, . 
almost 
a 
