PLANT LIFE IN OKLAHOMA. 67 



Populus alba. 

 Cottonwood. (Necklace poplar. Carolina poplar.) 

 Populus deltoides. 

 Western cottonwood. Lomibardy poplar. 



Populus deltoides ocddenialis. Populus nigra Italica or 



P Dilatata. 



iSwamp poplar. (Downy-leaved poplar.) 



Populus heterophylla, 



Lance-leaf cottonwood and narrow-leaf cottonwood. 



Populus acuminaia. Populus angustifoUa. 



OAK FAMILY. CUPULIFEEAE. 

 BIRCHES. GENUS BETULA. 



River birch. (Water birch. Eed birch.) 



Betula nigra. 



European white birch. 



Betula alba. 



ALDERS. GENUS ALNUS. 



Sea side alder. Smooth alder. 



Alnus maratima. Alnus rugosa or A. serrulata. 



HAZEUJSIUTS. GENUS CORYLUS. 



Wild hazlenut or common hazlenut. 

 Corylus Americana. 



HORNBEAMS. GENUS CARPINUS. 



American hornbeam. (Blue or water beech.) 

 Oarpinus Caroliniana. 



HOP HORNBEAM. GENUS OSTRYA. 



Iron-wood. (American hop-hornbeam.) 

 Ostrya Virginiana. 



OAKS. GENUS QUERCUS. 



Red oak. Southern red oak. (Schneclc's oak.) 



Quercus rubra. Quercus Texana. 



Pin oak. (Swamp oak.) Spanish oak. 



Quercus paludris. Quercus digitaia, or 



Quercus falcata. 



Yellow oak. (Black oak. Quercitron oak.) 



Quercus velutina. 



Black jack oak. (Barren oak.) 



Quercus Marilandica or Quercus nigra. 



Water oak. (Duck oak. Possum oak.) 



Quercus nigra or Quercus aquaticei. 



Willow oak. Shingle oak. 



Quercus phellos. Quercus imbricaria. 



White oak. 



Quercus alba. 



Post oak. (Rough or box white oak.) 



Quercus minor or Q. obtusiloba or Q. stellata. 



