Aberdeen Dewberry          

Absinthium          

Adam And Eve          

Adam's Needle          

Adder's-mouth Orchid          

Adderstongue          

Addison's Rosette Grass          

Adlumia          

Aethusa          

Agrimony          

Agueweed          

Ailanthus          

Albizia          

Alder          

Alderleaf Buckthorn      

Alfalfa          

Alkaligrass          

Allegheny Blackberry      

Allegheny Hawkweed          

Allegheny Monkeyflower          

Allegheny Serviceberry      

Allegheny Stonecrop          

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 Bird's-foot Trefoil          

American Bittersweet      

American Black Currant      

American Black Elderberry      

American Bladdernut          

American Bluehearts