1881.] Progress of Botany in the United States in 1880. 953 
Several new species of the genus Potamogeton were described 
by Thomas Morong, in the May Botanical Gazette. The new 
species are P. [/linoensis, P. Mysticus, P. lateralis, and P. gemmit- 
parus (the latter by Robbins). Notes are added upon several 
other species. 
I. C. Martindale, in a pamphlet entitled “ Notes on the Bartram 
Oak, Quercus heterophylla Michx.” reviewed the whole history of 
this much discussed and doubted species, and concluded that it 
should be restored as a true species. 
Professor Sargent’s “Preliminary Catalogue of the Forest 
Trees of North America,” contained 342 species, with notes as to 
size, range, economic uses, etc. 
Mention should be made here of H. W. Patterson’s “ Check 
List of N. A. Gamopetale after Composite,” designed for use in 
making exchanges, marking desiderata, etc. 
Robinson’s “Flora of Essex county, Massachusetts,” Smith 
and Mohr’s “ Preliminary List of the Plants growing without cul- 
tivation in Alabama,” Peck’s “Plants of the Summit of Mt. 
Marcy” (from the 7th Rept. of the Adirondack Survey), the list 
of “Ballast Plants in and near New York city,’ by Addison 
_ Brown, in the December Bulletin of the Torrey Botanical Club, are 
valuable additions to our knowledge of local floras. Here may 
be noted the beginning, in the last named journal, of an import- 
ant List of the State and local floras of the United States, by W. 
R. Gerard and N. L. Britton. - 
_ C. Geographical and Geological—Dr. T. F. Allen, in a paper ¢n- 
titled Similarity between the Characeze of America and Asia,” in 
the Bulletin of the Torrey Botanical Club, pointed out the resem- 
_ blance between the Asiatic and American Characez. “ A Summer 
~— inRoan mountain,” by J. W. Chickering in the December Botanical 
Gazette ; “ A Botanist in Southern California,” by J. F. James, in 
_ the July Naruratist; “ Botanizing on the Colorado desert,” by 
__E. L. Greene, in the November Naturauist; “ The imber — 
: Line of High Mountains,’ by Thomas Meehan, in the Proceed- 
ings of the Academy of Natural Sciences of Philadelphia, and 
| The Geological History of the North American Flora,” by Pro- 
fessor Newbury, in the July Bulletin of the Torrey Botanical Club — 
(abstract of a lecture) are the other important qontributions under’ 
‘Ais section. ; a 24 
_D. Historical—The conclusion of Frederick Brendel’s. “ His~ 
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_ ‘VOL, XV.—No. xin, : 
