Aberdeen Dewberry          

Absinthium          

Adam And Eve          

Adderstongue          

Adlumia          

Aethusa          

Agrimony          

Agueweed          

Ailanthus          

Albizia          

Alder          

Alfalfa          

Alkaligrass          

Allegheny Blackberry      

Allegheny Hawkweed          

Allegheny Monkeyflower          

Allegheny Serviceberry      

Allegheny Stonecrop          

Allegheny Vine          

Allegheny-spurge          

Alliaria          

Alpine Violet          

Alsike Clover      

Alternateleaf Dogwood      

Alumroot          

Amazon Sprangletop          

Amberboa          

Amberique-bean          

American Alumroot          

American Barberry          

American Basswood      

American Beachgrass      

American Beakgrain          

American Beech      

American Bellflower      

American Bittersweet      

American Black Currant      

American Black Elderberry      

American Bladdernut          

American Bluehearts          

American Bugseed          

American Bur-reed      

American Burnweed          

American Cancer-root