Table B2 .-- (continued) 



2. Fraxinus pennsylvanica common 

 FRAPEN/PRUVIR 



2. Fraxinus pennsylvanica scarce or absent -- 3 



3 . Acer negundo common 



ACENEG/PRUVIR 



3. Acer negundo scarce or absent -- 4 



4. Populus angustifolia with a greater canopy cover than either P. 



deltoides or Salix amygdaloides 

 POPANG/CORSER 



4. Populus angustifolia with less canopy cover than either P. 



angustifolia or Salix amygdaloides -- 5 



5. Populus deltoides v/ith a greater canopy cover than Salix amygda- 



loides 



POPDEL/CORSER 

 5. Populus deltoides with less canopy cover than Salix amygdaloides 

 SALAMY 



Key to Riparian Shrubland Communities 



1. Shepherdia argentea well represented 

 SHEARG 



1. Shepherdia argentea poorly represented or absent — 2 



2. Salix exigua common 



SALEXI 



2. Salix exigua scarce or absent -- 3 



3. Artemisia cana well represented 



ARTCAN/PASSMI 



3. Artemisia cana poorly represented or absent — 4 



4. Sarcobatus vermiculatus v;ell represented 



SARVER/PASSMI 



4. Sarcobatus vermiculatus poorly represented or absent — 5 



5. Crataegus succulenta or C. douglasii, individually or in combi- 



nation, well represented 

 CRASUC 



5. Crataegus succulenta or C. douglasii, individually or in combi- 



nation, poorly represented or absent — 6 



6. Prunus virginiana v/ell represented 



PRUVIR 

 6. Prunus virginiana poorly represented or absent -- 7 



46 



