No. 2. 
CATALOGUE OF PLANTS COLLECTED EAST OF THE ROCKY MOUNTAINS. 
BY PROFESSOR ASA GRAY. 
PLANTS COLLECTED EAST OF THE ROCKY MOUNTAINS. 
This collection was made by Dr. Suckley from the Mississippi river westward to Fort Benton, 
and Lieutenants Donelson and MuUan along the Missouri river from near St. Louis to Fort 
Union. All the plants were collected between May 10 and the end of August. This collection 
all belongs to one and the same region, physically and botanically — that of the plains of the 
northwestern portion of the great Mississippi basin. The species may, therefore, be enume- 
rated without regard to their particular localities, which, moreover, are not always recorded in 
the collection. Little novelty was to be exj^ected in a collection made in rapidly traversing a 
district already so repeatedly and thoroughly investigated. The species are, therefore, 
enumerated in the form of a classified list, such remarks or descriptive observations as are 
requisite being appended, as are the characters of some new plants; for this collection is found 
to contain three undescribed species and one new genus. 
Clematis Virginiana, Linn. Vermilion river. Mo. 
Pulsatilla patens, DC. 
Anemoxe Pennsylyanica, Linn. 
Anemone cylindrica. Gray. 
Thalictrum oornuti. Linn. 
Ranunculus divaricatus, Schrank. This is the Ranunculus aquatilis in part of Linnasus 
and of American authors, and R. circinatus. Sixth. It is the only species of the section 
Batrachium which I have seen in this country. 
Ranunculus abortivus. Linn. 
Ranunculus recuryatus, Poir. 
Ranunculus repens, Linn. 
Aquilegia Canadensis, Linn. 
Delphinium tricorne, Michx. 
Delphinium azureum, Michx. 
Act^a rubra, Bigelow. 
Menispermum Canadense, Linn. 
Podophyllum peltatum, Linn. 
Argemone Mexicana, Linn. var. albiflora. 
CORYDALIS AUREA, WiUd. 
Nasturtium sessiliplorum, Nutt. 
