The abbreviations indicate:

FS=Thrives in Full Sun
PS=Thrives in Part Sun
SH=Thrives in Full Shade
EV=Has Evergreen Foliage
PE=Perennial Flowers
EC=Good for Erosion Control
PS=Grows in Poor Soil
DT=Drought Tolerant
CL=Climber
NA=Native to the U.S.
ST=Salt Tolerant
MT=Moisture Tolerant
LB=Long Bloom Time
FR=Fragrant Blooms or Foliage
VA=Varieted Foliage
DR=Deer Resistant
GR=Growth Rate

Growth rates for a species may vary by cultivar, check product descriptions for specific growth rates.