Araucaria heterophylla
Norfolk Island Pine
Arbutus menziesii
Pacific Madrone
Arbutus unedo
Strawberry-tree
Ardisia elliptica
Coralberry
Arenaria serpyllifolia
Thyme-leaved Sandwort
Armeria maritima
Thrift
Armoracia rusticana
Horse-radish
Artemisia vulgaris
Mugwort
Arum italicum
Italian Lords-and-Ladies
Arum maculatum
Lords-and-Ladies
Aruncus dioicus
Buck's-beard
Asperula cynanchica
Squinancywort
Asplenium adiantum-nigrum
Black Spleenwort
Asplenium marinum
Sea Spleenwort
Asplenium nidus
Bird's-nest Fern
Asplenium ruta-muraria
Wall-rue
Asplenium scolopendrium
Hart's-tongue
Asplenium trichomanes
Maidenhair Spleenwort
Asplenium viride
Green Spleenwort
Astrantia major
Astrantia
Asystasia gangetica
Chinese Violet
Athyrium filix-femina
Lady-fern
Atriplex glabriuscula
Babington's Orache
Atriplex laciniata
Frosted Orache