Holm Additions to the Flora of Washington. 21 



1187*7. Panicum sphaerocarpon Ell. 



Woods near Riggs' Mill; Terra Cotta swamp; Chevy Chase; dry fields 

 near Hyattsville and the Reform School. 

 u88a. Panicum ramulosum Michx. 



Terra Cotta swamp. 

 n88&. Panicum nitidum Lam. 



Old river bottom near Hyattsville; Terra Cotta swamp. 

 uSSc. Panicum lanuginosum Ell. 



Woods at Forest Glen; Fort Totten. 

 *i 189*2. Panicum linearifolium Scribn. 



Plummer's Island. Thos. H. Kearney, Jr. 

 1192. Panicum Crus-galli L. var. hispidum Gr. 



In the canal at Great Falls. 

 1196. Cenchrus tribuloides L. 



Near Seven locks: along roads at Marshall Hall. 

 1203. Andropogon macrourus Michx. 



Sphagnum swamps near Surattsville. 

 1 220. Woodwardia Virginica Sm. 



Common near Surattsville. Wm. R. Maxon. 

 *i222. Asplenium pinnatifidum Nutt. 



Two miles below Scott's Run on Virginia shore of Potomac. Wm. 

 Palmer and Wm. R. Maxon. 

 *i222i. Asplenium ebenosdes R. R. Scott. 



Plummer's Island. Wm. Palmer. A single specimen. 

 1223. Asplenium angustifolium Michx. 



Ravines between Marshall Hall and the Piscataway; western end of 

 Massachusetts avenue bridge and Rock Creek. Wm. Palmer. Abund 

 ant along brooks in woodlands of the Potomac bluffs near Langley, Va. 

 Wm. R. Maxon. 

 1226. Camptosorus rhizophyllus Link. 



Plummer's Island. D. LeRoy Topping. Several situations on rocky 

 cliffs of the Virginia shore of the Potomac opposite Langley. Wm. R. 

 Maxon. 

 1230. Aspidium cristatum Swtz. 



In the Lygodium swamp about two miles to the northwest of River- 

 dale, Md. Wm. Palmer and Wm. R. Maxon. Woods near Great Falls, 

 Md. ; near the spring-house, Takoma. 

 1236. Cystopteris fragilis Bernh. 



Common in ravines north of Marshall Hall; Potomac Landing, Alex 

 andria County, Va. Wm. Palmer. Near Sandy Landing. 

 *i236. Cystopteris bulbifera (L.) Bernh. 



On the Virginia shore of Potomac nearly opposite Langley, Va. Wm. 

 Palmer and Wm. R. Maxon. Recorded in Flora Columbiana, Field and 

 Forest, Vol. I, 1875, but with no locality. 



