PLANTS OF ARKANSAS. 221 



prinus L. Reported by Nuttall and Lesquereux 

 under the name of 0. montana, Willd — 

 Coville. 



rubra, L. 



tine tori a, Bartr. 

 Castanea, Gsertn. 



(vesca, L., reported by Lesquereux, appears to have 

 been C. pumila.) 



pumila, Mill. 

 Fagus, L. 



ferruginea, Ait. 



SALICACEiE. 



Salix, L. 



discolor, Muhl.; Lesquereux. 



Immilis, Muhl. This is the 5. conifera of Nuttall's- 



Flora of Arkansas — Coville. 

 longifolia, Muhl ; Nuttall. 

 nigra, Marsh. 

 Populns, L. 



heterophylla, L.; Harvey. 

 mo?iilifera, Ait. 



CERATOPHYLLACEJE. 



Ceratophyllum, L. 



demersum, L.; Nuttall, Lesquereux. 



HYDROCHARIDACEJE. 

 Elodea, Michx. 



canadensis, Michx. {.{Anarcharis canadensis, Planch.);. 

 Nuttall, Lesquereux. 

 Vallisneria, L. 



spiralis, L.; Nuttall. 

 Limnobiiim, Rich. 



spongia, Rich.; Lesquereux. 



ORCHIDACEJE. 



Microstylis, Nutt. 



unifolia (Michx.), BSP. (M. ophioglossoides, Nutt.) 



