Arabis hirsuta
Hairy Rock-cress
Arabis scabra
Bristol Rock-cress
Araucaria columnaris
New Caledonia Pine
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
Atriplex littoralis
Grass-leaved Orache
Atriplex portulacoides
Sea-purslane
Atriplex prostrata
Spear-leaved Orache
Atropa belladonna
Deadly Nightshade
Avena sativa
Oat
Avicennia marina
Grey Mangrove
Azadirachta indica
Neem Tree
Baldellia ranunculoides
Lesser Water-plantain
Ballota nigra
Black Horehound
Baltimora recta
Beautyhead
Bambusa vulgaris
Common Bamboo
Barbarea verna
American Winter-cress
Barleria cristata
Philippine-violet
Barringtonia racemosa
Powder-puff Tree
Basella alba
Malabar Spinach
Bauhinia monandra
Pink Bauhinia
Begonia heracleifolia
Star Begonia
Begonia sp.
Berberis vulgaris
Barberry
Berula erecta
Lesser Water-parsnip
Beta vulgaris
Sea Beet
Betonica officinalis
Betony
Betula pubescens
Downy Birch
Bidens cernua
Nodding Bur-marigold
Bidens pilosa
Spanish-needles
Bidens tripartita
Trifid Bur-marigold
Bignonia magnifica
Glowvine
Bistorta officinalis
Common Bistort
Bistorta vivipara
Alpine Bistort
Blechnum orientale
Blechnum spicant
Hard-fern
Blitum bonus-henricus
Good-King-Henry
Blumea balsamifera
Sambong
Blysmus compressus
Flat-sedge
Borago officinalis
Borage
Botrychium lunaria
Moonwort
Brachypodium sylvaticum
False-brome
Brassica juncea
Chinese Mustard
Brassica rapa
Turnip
Breynia disticha
Snowbush
Breynia vitis-idaea
Officinal Breynia
Brunfelsia americana
Lady of the Night
Bryonia dioica
White Bryony