Additions to the Flora of Wdt-Jirngfon. 125 



*840((. Quercus coccinea X falcata. 



Brii;ht\voud, between Bunker Hill road and Brentwood road. 

 H. W. Henshaw. 



*842a. Quercus falcata x tinctoria. 

 Le Droit Park. H. W. Henshaw. 



848. Queicus Leaiia Xutt. 



Cal)in John Bridge. H. W. Henshaw. 



849. Qaercus heterophylla IMiclix. 

 Fort Bennett. H. \V. Henshaw. 



ARACE.E. 



874. Arisaema Dracontium Scliott. 



Near Spout Run. E. S. Burgess. Great Falls, on the Mary- 

 land side. Lester F. ^^''ard and the author. 



LEMNACE.E. 



*879((. Lemna gibba L. 



Old canal, foot of Eighteenth and Twentieth streets. Lester 

 F. Ward. 



NAIADACE.E. 



884. Najas flexilis Rostk. 



Several fruiting sjDecimens were collected in the Brasenia pond 

 near Chain Bridge. G. W. Oliver. 



887. Potamogeton hybridus ]Michx. 

 Alexandria. G. W. Oliver. 



^888.;. Potamogeton Robbiusii Oakes. 

 Hunting Creek, Virginia. F. V. Coville. 



OECHIDACE^E. 



903. Orchis spectabilis L. 



Several place-? in the woods al)ove Aqueduct Bridge, on the 

 Virginia shore. The author. Near the first bridge over Rock 

 Creek on Connecticut avenue extended. G. B. Sudworth. 



