72 
TETRADYNAMIA. SILIQUOSA. 
thick, resembling those of many species of Brassica, un- 
dulated, smooth, glaucous, interruptedly and almost ly- 
rately pinnatifid. Flowers very numerous, raceme 12 to 18 
or more inches long. Calix 4-leaved decussate, nearly 
an inch in diameter, of a deep and bright yellow border 
ing on orange, leaves ligulate, obtuse; subovate at the 
base, a little concave, incurvately spreading. Petals 4, 
erect, the claws connivent in the form of a long 4-sided 
tube, internally pubescent; limb short and oblong, su/phur 
yellow Glands 4. Stamina 6, nearly equal in length, 
-exserted and almost double the length of the calix, 4 of 
them disposed by opposite pairs, (as in all other genuine 
Cruciferous plants;) filaments flat and subiulate, anthers 
linear, at length recurved. Style and stigma scarcely ap- 
parent. Silique slender and conspicuously stipitate, 15 lines 
long, torulose, 2-celled, and 2-valved, dissepiment mem- 
branacevus and parallel. Seeds rather small, bright brow”, 
linear-oblong, the base somewhat acute, partly plano- 
convex; marked with a central groove. Embryon flat 
and erect, not incurved. Has. Commencing, (as » ¢ obser- 
ved,) near the confluence of Paint creck and the Missou- 
‘ri, growing on the talus of broken calcarcous cliffs; frem 
hence it occurs locally for 2 or S00 miles further up the 
river, so that ii appears only to occupy a limited belt 
which traverses the Missouri. I fowers in the month 0 
May, and is by far the most splendid plant in the Natural | 
* 
Order of Crucirexs, from which it is inseparable in 
point ‘of affinity, notwithstanding its very singular calix, 
_ corolla, and stipitate silique, which lay claim to the or 
Brassica oleracea, vad induced us to collect them as au at- 
taken of this deleterions vegetable, after being boile 
ge gang secede yes : 
_ The Brassica Washitana, of Mublenberg’s Catalogue» 
will, when better known, probably a second species 
der CarpPAripes in common with the genus Stephanid, 
to which the present appears nearly allied, and holds that 
= of Aer and intermediate rank which ab og 
existence of a general and natural alliance through 
the vegetable kingdom. The ambiguous character. of 
Stanleya, and its near aflinity to the suspicious CaP PA- 
RIDEs, we had occasion to prove; its large, and glaucous 
leaves, so much like some of the cultivated varieties 
ticle of diet, but to more than half of those who had ra 
a violent emetic; which I suspect to be the cas 
info by hunters who have traversed those regions.— 
oe plant there is no specimen im Muhlenberg’s her- 
