To look up a plant by its scientific name, hit the drop-down menu arrow and highlight the type of plant you are seeking - shrub, tree, ground cover, perennial, etc. Next hit GO. Finally, select the first letter of the genus from the alphabet bar below. .
If you don't know the Scientific Name of a plant, you can search by Common Name or Variety/Cultivar by placing the cursor on either heading and clicking. This will re-alphabetize the plant list accordingly. Then continue as before, first choosing plant type and then the first letter of the Common or Variety/Cultivar Name.