Additions to the Flora of Washington. 125 



*840. Quercus coccinea X falcata. 



Brightwood, between Bunker Hill road and Brentwood road. 

 H. W. Henshaw. 



*842a, Quercus falcata X tinctoria. 



Le Droit Park. H. W. Henshaw. 



\ 



848. Quercus Leana Nutt. 



Cabin' John Bridge. H. W. Henshaw. 



849. Quercus heterophylla Michx. 

 Fort Bennett. H. W. Henshaw. 



ARACEM. 



874. Arisaema Dracontium Schott. 



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

 land side. Lester F. Ward and the author. 



LEMNACEM 

 *B79a. Lemna gibba L. 



Old canal, foot of Eighteenth and Twentieth streets. Lester 

 F. Ward. 



NA1ADAGEM. 

 884. Najas flexilis Rostk. 



Several fruiting specimens were collected in the Brasenia pond 

 near Chain Bridge. G. W. Oliver. 



887. Potamogeton hybridus Michx. 

 Alexandria. G. W. Oliver. 



. Potamogeton Robblnsii Oakes. 

 Hunting Creek, Virginia. F. V. Coville. 



ORCHIDACEsE. 

 900. Orchis spectabilis L. 



Several places in the woods above Aqueduct Bridge, on the 

 Virginia shore. The author. Near the lir.st bridge over Rock 

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



