ey Te mS 
MR. DRUMMOND’S COLLECTIONS. 191 
upper, all of them, very deeply pinnatifid. It appears to 
grow only in the Southern States. I have received it from 
Mr. Elliott (as his Sisymbrium Walteri), from Mr. Parker 
and from M. Tainturier, as well as from Mr. Drummond. 
39. Arabis hirsuta, L.—Alleghanies. 
40. Arabis levigata ,DC.—Turritis levigata, Willd.—Alle- 
ghanies. 
4l. Cardamine hirsuta, L.— C. Pennsylvanica, Auct. 
mer.—N. Orl. (n. 20.) —Var. teres. Hook. and Arn.— C. 
teres. Mich. DC.—N. Orl. (n. 21.) In this state the 
leaflets of the upper leaves are lanceolate, those of the lower 
ones orbicular. 
42. Cardamine Ludoviciana; caulibus procumbentibus, foliis 
inferioribus bipinnatifidis laciniis lineari-oblongis, superi- 
oribus pinnatifidis hic illie grosse dentatis laciniis linearibus 
lineari-spathulatisve, siliquis erectis linearibus planis obscure 
venosis stylo breviusculo terminatis, seminibus orbicularibus 
compressis limbatis. —Sisymbrium Ludovicianum. Nutt, MSS. 
in Herb. nostr.—N. Orl. (n. 22.) Louisville; but sent in 
the St. Louis collection. 
This plant I have long known as an inhabitant of the 
embouchure of the Mississippi from specimens sent to me by 
Mr. Parker, and by Mr. Tainturier; and I was at first dis- 
posed to refer it to one of the numerous varieties of O. hirsuta; 
but the more rigid foliage, the (comparatively) broad flat pods; 
and, above all, the constantly margined seeds forbid such an 
union. The general habit of the plant is similar to that of Nas- 
turtium tanacetifolium the lower leaves are all, always, bipin- 
natifid (or pinnate with the pinnze decurrent, linear, or linear- 
oblong deeply pinnatifid, with few segments.) The flowers are 
small, white. I possess a solitary specimen of the same plant 
from Dr. Torrey, marked ** Kentucky, Cardamine Virginica? 
distinct from the northern C. Virginica.” The latter indeed 
does not at all differ from C. hirsuta. I am aware that, 
according to De Candolle’s character, the margined seeds 
would exclude our plant from Cardamine: but it wants the 
* middle nerve" on the capsule of Arabis, and must naturally 
