Arctium nemorosum
Wood Burdock
Arctium tomentosum
Woolly Burdock
Arenaria montana
Mountain Sandwort
Arenaria serpyllifolia
Thyme-leaved Sandwort
Argemone subfusiformis
Prickly Poppy
Aristolochia clematitis
Birthwort
Armeria maritima
Thrift
Armoracia rusticana
Horse-radish
Arrhenatherum elatius
False Oat-grass
Artemisia vulgaris
Mugwort
Arthropodium candidum
Forest#Floor Lily
Arum italicum
Italian Lords-and-Ladies
Arum maculatum
Lords-and-Ladies
Aruncus dioicus
Buck's-beard
Asarina procumbens
Trailing Snapdragon
Asparagus officinalis
Garden Asparagus
Asparagus verticillatus
Climbing Asparagus
Asperula cynanchica
Squinancywort
Asphodelus albus
White Asphodel
Asphodelus fistulosus
Hollow-stemmed Asphodel
Asplenium adiantum-nigrum
Black Spleenwort
Asplenium ceterach
Rustyback
Asplenium marinum
Sea Spleenwort
Asplenium onopteris
Irish Spleenwort