62 Steele — Additions to tlie Florx of Washiitgton. 



*i25a. Portulaca grandiflora TTook. 

 Waste oround, SepU-mber 11), lUOO. 



io6. Silene alba Mnhl. (S. nivea of Ward's Catalogue). 



Feeder Dam, Plummer's Island, Rock Creek flats near Captain Jones' 

 place. 



*i09a. Silene antirrhina divaricata Robinson. 



Kensington, July 4, 1899; overripe at this date. Probably same, High 

 Island and First lock. Perhaps a good species. 



120. Sagina decumbens (Ell.) Torr. & Gray. 

 Congress Heights, May 16, 1898. 



121. Tissa rubra (L.) Britton. 



Crevices in sidewalk, head of Fourth street; road west of Georgetown. 



i24rt. Scleranthus annuus L. 



Street north of old observatory. May 4, 1808. 



*38rt. Cabomba Caroliniana A. Gray, var. 



Leaves of this plant were collected by Mr. Dewey and myself in 

 Beaver Dam Branch near its entrance to Eastern Branch in September, 

 1897, but its identity was not then made out. I collected the plant in 

 flower September 1, 191)0, in the river a little below the Navy Yard 

 Bridge. As Cabomba is known to have been planted in the Eastern 

 liranch for use in aquaria, it has doubtless spread from that .source, and 

 it may now be considered as established. There is a specimen in the 

 National Herbarium from one of the fish ponds, collected by Dr. Vasey, 

 which is said to be introduced from the Patapsco River. 



Our plant has the decided peculiarity that all of the floating leaves 

 except the two lowermost, and .sometimes these also, are lobed at the 

 base, giving the leaf a sagittate form. In the ordinary descriptions 

 these leaves are said to be entire, but Gray in the Illustrated Genera 

 says "or emarginate". The cleft in our plant perhajis never reaches 

 down to the petiole, but it is usually far deeper than would be indicated 

 by the term emarginate. The specimen from the Patapsco River seems 

 to have the same peculiarity. Some of the materia! planted in the 

 Eastern Branch is said to have been brought with goldflsh from Japan, 

 but this is probably a mistake, as there is no species of Cabomba re- 

 ported from that country. This is presumably a form or variety of C. 

 CnroUiriana, but it would be interesting to know where it is native. 



24. Delphinium tricorne Michx. 



A single plant on the mainlanil near Pluinmer"s Island, Marylantl 

 side. May i:^, 19U0. 



26. Aconitum uncinatum L. 



Near Tenleytown Junction, on Glen Echo Heights, and near Linnaean 

 Hill road. 



*9a. Anemone Canadensis L. 



Woods below Congress Heights, May 25, 1898, in a moderate patch, 



