04 TETRADYNAMIA. SILICULOSAs 
ded teanerseededs style terete, about the length of the 
3! " 
3. Ayperboreum. Has, On the N. West Coast. 
An extensive genus of near 40 species, principally indi- 
genous to the mountains of Europe, and the temperate 
parts of Northern Africa and Asia. The southern hemis- 
phere does not appear yet to have afforded a single Alys- 
sum, Sent we Consider with Persoon Draba eaten. 
as such. 
453. CORONOPUS. Gartner. (Wart-Cress.) 
Silicle reniform, compressed, and corrugated, 
cells valveless, 1-seeded. 
A Pat oy in sensible properties and vegetation similar to 
um, Leaves entire or pinnatifid. Stamina in Cc. 
Py en 2 or 4, Corymb lateral or terminal. 
Species. 1. C. didyma. Abundant the margins 
of the Mississippi and Missouri, common in Carolina 
with the following. 2. Ruellii. 
‘ A genus of 4 species, 2 indigenous in common to Eu- 
rope and America. C. didyma was also, 1 believe, re~ 
putea around Port Jackson in New Holland by Mr. R. 
Brown. ‘Two other species are now added to the genus, 
1 from Madagascar, the second frem Monte-video, and not 
apparently very distinct from entire leaved specimens of 
Lepidium virginicum. 
454. LEPIDIUM, L. (Cress.) 
, - Silicle emarginate, elliptic, cells 1-seeded, 
es carinate, dissepiment contrary. 
Leaves often pinnatifid or deeply serrated, many of 
the stamina and in some species the petals defective. 
Species. 1. L. virginicum. Leaves linear- lanceolate, 
y allentire, but deeply serrate, flowers diandrous; 
: ‘giliele lentiform and emarginate, cells 1-seeded; stem 
branched towards the summit.—Common every-where- 
Flowers minute. 
ae ensve genus of near 40 species, indigenous to 
' Siberia, er the islands, and the 
pe of G Society . 
455. THLASPI. ie (Shepherd’s-purse.) 
Silicle emarginate, obcordate, many seeded: 
_ valves nayicular, with a carinate margin. 
oo earners LEY 
