PHILOSOPHICAL SOCIETY OF WASHINGTON. 79 



tract of country surrounding this and stretching southward and 

 eastward some distance has also proved very fruitful. In the dif- 

 ferent portions of this region have been discovered Phlox maculata, 

 Melanthium Virginicum, Bartonia tenella, Lespedeza Stuvei, Desmo- 

 dium Marilandicum and D. cilare, Buchnera Americana, Fimbri- 

 stylis capillaris, Quercus prinoides, Car ex bullata, and Gentiana 

 ochroleuca, most of which do not occur at all elsewhere. 



6. The Holmead Swamp Region. 



Like the last, this locality is quite circumscribed in area, but 

 like it, too, it is rich in interesting plants. It occupies a ravine 

 leading to Piney Branch from the east at the point where the con- 

 tinuation of Fourteenth street crosses that stream. The road con- 

 necting the last named with the Rock Creek Church road, and 

 which is called Spring street, follows this valley. The collecting 

 grounds are on the south side of this road and in the springy 

 meadow along the rill. The timber has long been cut off, but the 

 boggy character of the ground has thus far protected it from culti- 

 vation. The pasturing of animals on it during a portion of the 

 year has latterly become a serious detriment to the growth of plants. 

 Mr. Holmead, who owns it and lives near by, has kindly permitted 

 botanists to investigate it for their purposes. Here have been found 

 Ludwigia hirsuta, Drosera rotundifolia Asclepias rubra, Xyris flex- 

 uosa, Fuirena squarrosa, Rhinchospora alba, Coreopsis discoidea and 

 the beautiful Calopogon pulchellus the most showy of our orchids. 



In addition to these specially fertile tracts there are many other 

 localities of great interest where valuable accessions to our flora 

 have been made, and which will be particularly designated under 

 the names of these species. It will suffice here to mention a wet 

 meadow between the National Uriving Park and Bladensburg, 

 where, in a very diminutive spot, Sarracenia purpurea, Viola lanceo- 

 lata, and Carex bullata, the two first wholly unknown elsewhere, 

 have been discovered ; a marsh a mile from Bladensburg, near the 

 millrace, where only the majestic Stenanthium robustum has been seen ; 

 a little swamp near the Sligo creek, between the Riggs and Blair 

 roads, where the Hartford fern (Lygodium palmatum) grows spar- 

 ingly ; and another between Bladensburg and the Maryland Agri- 

 cultural College, where Solidago elliptica, Ascyrum stans, and Lyco- 

 podium complanatum, var. Sabincefolium, have been found. The 



