192 MR. DRUMMOND’S COLLECTIONS. 
rank next to C. hirsuta. The cotyledons are accumbent, it > 
cannot therefore be a Sisymbrium. Mr. Nuttall’s specimens 
are from the banks of the Mississippi, so that this species is 
principally confined to the great valley formed by that river 
and its tributary streams. 
43. C. rhomboidea, DC.—Alleghanies. Pennsylvania. 
44. C. rotundifolia, Mich.—Alleghanies. See remarks 
upon this and the preceding species, in the Botanical Mis- 
cellany, v. iii. p. 237. t. 108, 109. 
45. Dentaria laciniata, Muhl.—Alleghanies. St. Louis 
46. D. diphylla, Mich.—Alleghanies. St. Louis. 
47. Draba dentata, Hook. and Arn.—Alyssum dentatum. 
Nutt. Gen. v. 2. p. 63.—Draba arabizans of Pursh, but not of 
Mich., (according to Nuttall)—Harper’s Ferry, Virginia.— 
Certainly a Draba, and a most distinct and well marked 
plant. Mr. Greene, as well as Mr. Drummond, has gathered 
it in Muhlenberg’s original station, where it grows on slaty 
rocks. Dr. Short finds it in similar situations, ‘ Cliffs of 
the Kentucky river, rather rare,” with more rigid, longer, 
and sharper leaves, and longer and sharper teeth. Mr. 
Nuttall well observes that it cannot be the Draba arabizans 
of Michaux, which is a more northern plant, and compared 
by that author with D. incana, with which it is probably 
identical. 
48. Hesperis pinnatifida, Mich.—Alleghanies. 
49. Sisymbrium arabidoides, Hook.—Pennsylvania. 
50. Lepidium Virginicum, L.—Covington, Louisiana. 
51. L. rudderale, L.—St. Louis. N. Orl. (n. 24.) 
52. Senebiera pinnatifida, DC.—N. Orl. (n. 23.) S 
CAPPARIDEÆ. Juss. 
53. Gynandropsis pentaphylla, DC.—N. Orl. 
CISTINEÆ. Juss. 
54. Helianthemum Carolinianum, Mich.—N. Orl. (n. 25.) 
55. Lechea villosa, Ell.—St. Louis. Covington, Louisiana. 
56. L. minor, Persl.—Cóvington, Louisiana. 
