Common names: G
- Gagnepain's barberry
- gallica rose
- garden angelica
- garden astilbe
- garden auricula
- garden balsam
- garden chervil
- garden cosmos
- garden goldenrod
- garden heliotrope
- garden huckleberry
- garden hyacinth
- garden leek
- garden lobelia
- garden loosestrife
- garden lupin
- garden monkshood
- garden nasturtium
- garden onion
- garden orache
- garden pansy
- garden parsley
- garden pea
- garden phlox
- garden privet
- garden radish
- garden rhubarb
- garden snowberry
- garden strawberry
- garden tree mallow
- garden vetch
- gardenia
- garland chrysanthemum
- garland flower
- garlic
- garlic cress
- garlic mustard
- garlic passion fruit
- Gaudin's houseleek
- Geneva bugle
- gentian
- gentian sage
- gentian speedwell
- German catchfly
- German chanomile
- German garlic
- German iris
- German violet
- germander
- germander speedwell
- giant allium
- giant angelica
- giant arborvitae
- giant bamboo
- giant bellflower
- giant butterbur
- giant cow parsnip
- giant crape myrtle
- giant daisy
- giant dead nettle
- giant dogwood
- giant elephant's ear
- giant feather grass
- giant fennel
- giant hogweed
- giant horsetail
- giant inula
- giant ironweed
- giant knotweed
- giant leopard lily
- giant oxalis
- giant potato
- giant redwood
- giant reed
- giant sea holly
- giant sensitive tree
- giant sequoia
- giant silver grass
- giant snowdrop
- giant spear lily
- giant sunflower
- Giant taro
- giant thistle
- giant timber bamboo
- giant trillium
- giant water lily
- Gibraltar candytuft
- ginger
- ginger lily
- ginger mint
- ginkgo
- gipsywort
- glade cone flower
- gladiolus
- Gladwin iris
- Glasshouse banksia
- glasswort
- glaucous dog rose
- glaucous hair grass
- glaucous willow
- globe amaranth
- globe candytuft
- globe gilia
- globe mallow
- globe thistle
- globeflower
- globemallow
- glory bower
- glory flower
- glory lily
- glory of the snow
- glory tree
- glorybower
- glossy abelia
- glossy scabious
- glow vine
- gloxinia
- glutinous sage
- goat willow
- goat's beard
- goat's rue
- goatsbeard
- goatweed
- goji berry
- gold and silver chrysanthemum
- gold coin
- golden Alexanders
- golden alyssum
- golden angel's trumpet
- golden bamboo
- golden banner
- golden barrel cactus
- golden calla
- golden cinquefoil
- golden columbine
- golden currant
- golden dewdrop
- golden drop
- golden everlasting
- golden feather grass
- golden flax
- golden garlic
- golden grass
- golden larch
- golden pea
- golden penda
- golden plume
- golden prince's plume
- golden pseuderanthemum
- golden rain
- golden rain tree
- golden root
- golden rose
- golden rose of China
- golden shield fern
- golden shrimp plant
- golden spurred columbine
- golden star
- golden tickseed
- golden trumpet
- golden trumpet tree
- golden wattle
- golden yarrow
- golden yellow-flowered dendrobium
- golden zizia
- golden-tuft alyssum
- goldencreeper
- goldenmane tickseed
- goldenrod
- goldilocks
- goldmoss stonecrop
- Good King Henry
- gooseberry
- gooseneck loosestrife
- gourd
- goutweed
- graceful cattail
- graceful corn cockle
- grand wormwood
- grape
- grape honeysuckle
- grape hyacinth
- grape vine
- grape-leaf anemone
- grapefruit
- grapevine
- grass tree
- grassy-leaved sweet flag
- graveyard cypress
- gray sagewort
- gray stonecrop
- gray willow
- great blanket flower
- great blue lobelia
- great burdock
- great burnet
- great camas
- great globe thistle
- great golden knapweed
- great hairy willow herb
- great horsetail
- great masterwort
- Great Plains yucca
- great St. John's wort
- great willow
- great wood rush
- great yellow gentian
- greater bellflower
- greater burnet saxifrage
- greater butterfly orchid
- greater celandine
- greater galangal
- greater knapweed
- greater musk mallow
- greater periwinkle
- greater plantain
- greater sea kale
- greater stichwort
- greater yellow lady's slipper orchid
- Grecian windflower
- Greek mullein
- Greek oregano
- Greek spiny spurge
- green alkanet
- green bean
- green cabbage
- green fruited fig
- green hellebore
- green lavender
- green lavender cotton
- green moor grass
- green rose
- green trumpet pitcher
- Greigii tulip
- grenadia
- grey alder
- grey cinquefoil
- grey fescue
- grey willow
- Griffith's redbud
- gromwell
- Grossek's bellflower
- ground clematis
- ground cover rose
- ground elder
- ground ivy
- ground thistle
- groundsel
- Guatemalan rhubarb
- guavasteen
- guelder rose
- Guernsey lily
- gum
- gum rockrose
- gypsophila