VOL. XIV, PP, 47-86 JUNE 19, 1901 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON SIXTH LIST OF ADDITIONS TO THE FLORA OF WASHINGTON, D. C. AND VICINITY. BY EDWARD S. STEELE. WITH DESCRIPTIONS OF NEW SPECIES AND VARIETIES BY EDWARD L. GREENE, ALVAH A. EATON, AND THE AUTHOR. The following list is based upon a course of collecting prose cuted outside of my routine work for five years beginning with 1896. The general purpose has been merely to record names of new and less familiar plants, with stations; but advantage has been taken of the opportunity to publish a few descriptions of new local material and to record some observations. Professor Greene has kindly furnished for publication here a name and character for a new violet which I was so fortunate as to discover. Mr. Alvah A. Eaton describes two new forms of Isoetes, which are not, however, my own discoveries. I propose a segregate from the Lycopus virginicus of authors, a well-marked species long since noticed, but apparently never properly named. In an extended note on Vernonia glauca I hope to have set that species in a somewhat clearer light. Other notes are scattered through the list. I am indebted to several gentlemen for the revision of my determinations, particularly to Mr. L. H. Dewey, who studied all my earlier collections of grasses. The dichotomous Pani-JO BIOL. Soc. WASH. VOL. XIV, 1901. (47)
Sixth list of additions to the flora of Washington, D.C. vicinity. With descriptions of new species varieties by Edward L. Greene, Alvah A. Eaton, and the author
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