Common names: B
- baby's breath
- Baikal anemone
- Baikal skullcap
- Bailey's wattle
- bald cypress
- baldhip rose
- Balearic boxwood
- Balkan blue grass
- ball dahlia
- ball flower
- balloon flower
- balloon plant
- balm
- balsam
- balsam apple
- balsam scented pelargonium
- balsamic sage
- bamboo
- bamboo grass
- bamboo orchid
- bamboo-leaf oak
- banana
- banana passion flower
- banana poke
- baneberry
- banksia
- baobab
- barberry
- barley
- Barneby's columbine
- barrenwort
- basil
- basil mint
- basket of gold
- bastard balm
- bat flower
- bat leaved passion flower
- bat-faced cuphea
- batate
- Batavian lettuce
- Bavarian gentian
- beach daisy
- beach grass
- beaked triggerplant
- bean
- bear oak
- bear's breeches
- bearberry
- bearberry cotoneaster
- bearberry honeysuckle
- beard of Jupiter
- beard tongue
- bearded iris
- beardtongue
- bearwort
- beautiful fleabane
- beautiful hair moss
- beauty bush
- beautyberry
- bee balm
- bee tree
- beebalm
- beech
- beefsteak plant
- beehive ginger
- beet
- beetroot
- beggarticks
- begonia
- bell-fruited gum
- belladonna lily
- bellflower
- bellflower rhododendron
- bells of Ireland
- Berlin poplar
- Betel pepper
- Bethlehem sage
- betony
- Bhutan pine
- biblical mint
- big betony
- big blue lily turf
- big-flowered foxglove
- big-horned spurge
- big-leaved hydrangea
- big-leaved magnolia
- bigleaf aster
- bigroot cranesbill
- bilberry
- bindweed
- birch
- birch bolete
- birchleaf pear
- bird cherry
- bird of paradise flower
- bird vetch
- bird's nest fern
- birthwort
- bishop's cap cactus
- bishop's crown
- bishop's weed
- Bismarck palm
- bistlecone pine
- bitter apple
- bitter candytuft
- bitter orange
- bittercress
- bitternut hickory
- bittersweet
- bittersweet nightshade
- black alder
- black allium
- black bamboo
- black birch
- black broom
- black bryony
- black cherry
- black chokeberry
- black cohosh
- black cosmos
- black crowberry
- black cumin
- black currant
- black garlic
- black gum
- black haw
- black henbane
- black horehound
- black jewel orchid
- black knapweed
- black locust
- black mondo
- black mulberry
- black nightshade
- black pepper
- black pine
- black pussy willow
- black root
- black spot disease
- black swallowwort
- black tang
- black tupelo
- black veratrum
- black-eyed Susan
- blackberry
- blackberry lily
- blackbrush
- bladder campion
- bladder hibiscus
- bladder wrack
- bladdernut
- bladderwort
- bladderwrack
- blaeberry
- blanket flower
- blazing star
- bleeding glory bower
- bleeding heart
- bleeding heart vine
- blessed milk thistle
- blessed thistle
- blood flower
- blood lily
- blood red passion flower
- blood root
- blood sage
- bloodflower milkweed
- bloody cranesbill
- bloody dock
- blue anemone
- blue anise sage
- blue beard
- blue bugle
- blue butterfly bush
- blue comfrey
- blue corydalis
- blue curls
- blue daisy
- blue eryngo
- blue false indigo
- blue fenugreek
- blue fescue
- blue giant hyssop
- blue ginger
- blue globe-thistle
- blue glory bower
- blue gum
- blue heliotrope
- blue honeysuckle
- blue lace flower
- blue Latan palm
- blue lungwort
- blue marguerite
- blue oat grass
- blue passion flower
- blue phlox
- blue potato bush
- blue sage
- blue sausage fruit
- blue spruce
- blue spurge
- blue star
- blue star juniper
- blue stonecrop
- blue throatwort
- blue trumpet vine
- blue wood aster
- blue-eyed Mary
- blue-stemmed goldenrod
- bluebeard
- bluebell
- bluebells
- blueberry
- blueberry climber
- bluestar
- Bodinier's beautyberry
- bog arum
- bog Labrador tea
- bog laurel
- bog rosemary
- bog-bean
- Bokhara iris
- bolete
- Bolivian coriander
- Bolivian cucumber
- bonnet bellflower
- book aloe
- borage
- border forsythia
- boreal chickweed
- Bosnian maple
- Bosnian pine
- Bosnian widow flower
- Boston ivy
- bottle gourd
- bottle palm
- bottle tree
- bottlebrush
- bottlebrush buckeye
- bouquet tulip
- Bourbon rose
- Bourgati's eryngo
- bowman's root
- box
- box-leaved holly
- boxthorn
- boxwood
- boxwood hebe
- brahmi
- Braun's shield fern
- Brazil raintree
- Brazilian button flower
- Brazilian candles
- Brazilian cloak
- Brazilian firetree
- Brazilian fuchsia
- Brazilian jasmine
- Brazilian plume flower
- Brazilian snapdragon
- breadfruit
- Brewer's weeping spruce
- briar
- bridal wreath
- bristly locust
- brittle gum
- brittle willow
- broad bean
- broad leaved spindle tree
- broad-leaved dutchman's pipe
- broad-leaved goldenrod
- broad-leaved grape hyacinth
- broad-leaved marsh orchid
- broad-leaved penstemon
- broad-leaved ragwort
- broadleaf garlic
- broadleaf lavender
- broadleaf plantain
- broadleaf Solomon's seal
- broadleaf toadflax
- broccoli
- brook thistle
- broom
- broomrape
- brown flax
- brown knapweed
- brown-eyed Susan
- brush cherry
- Brussels sprout
- bryony
- buckbean
- buckthorn
- buckwheat
- Buddha’s belly bamboo
- Buddha's hand
- buffalo currant
- bugbane
- bugle
- bulbous corydalis
- Bulgarian iris
- bull thistle
- Bulley's iris
- bullock eye
- bulrush
- bunny ears cactus
- Bunya Bunya tree
- Bunya pine
- burdock
- Burkwood's daphne
- Burkwood's viburnum
- burnet
- burnet rose
- burning bush
- burningbush
- burro's tail
- bush lily
- bush mallow
- bush monkey flower
- bush vetch
- bushclover
- bushman's poison
- bushy aster
- busy Lizzie
- butcher's broom
- butter fruit
- butterbur
- buttercup
- buttercup winter hazel
- butterfly bush
- butterfly flower
- butterfly gaura
- butterfly iris
- butterfly milkweed
- butterfly orchid
- butterfly palm
- butterfly pea blue pea
- butterfly silkweed
- butterknife tree
- butternut
- butternut squash
- butterspoon tree
- butterwort
- button bush
- button snakeroot
- buttonbush
- buzy Lizzie