Gladiolus illyricus
Wild Gladiolus
Gladiolus papilio
Butterfly Sword Lily
Glaucium flavum
Yellow Horned-poppy
Glebionis segetum
Corn Marigold
Glechoma hederacea
Ground-ivy
Gliricidia sepium
Madre de Cacao
Gloeocystis sp.
Glyceria declinata
Small Sweet-grass
Glyceria fluitans
Floating Sweet-grass
Glyceria sp.
Glycosmis parviflora
Jamaican Mandarin-orange
Glycyrrhiza glabra
Liquorice
Gnaphalium uliginosum
Marsh Cudweed
Goeppertia louisae
Goeppertia majestica
Majestic Prayer Plant
Gomphrena globosa
Globe Amaranth
Gomphrena serrata
Prostrate Globe Amaranth
Goodyera repens
Creeping Lady's-tresses
Graptophyllum pictum
Caricature-plant
Grimmia pulvinata
Grey-cushioned Grimmia
Griselinia littoralis
New Zealand Broadleaf
Grona triflora
Creeping Tick Trefoil
Guizotia abyssinica
Niger
Gunnera tinctoria
Giant-rhubarb