Geum triflorum
Prairie Smoke
Native to North America. Foot-wide leafy mound produces stems to 20 in. tall, each bearing clusters of...
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Gilia capitata
Blue Thimble Flower
Native from British Columbia to California. Grows 6–24 in. high, about 9 in. wide. Pale violet-blue to...
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Gilia tricolor
Bird's Eyes
Native to California. Grows to 4–18 in. high, about 9 in. wide. Subtly beautiful flowers, carried sing...
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Ginkgo biloba
Maidenhair Tree
Ancient survivor from prehistoric times (200 million years ago), when it grew worldwide; now native on...
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Gladiolus (Grandiflora hybrids)
Garden Gladiolus
These are the best-known gladiolus, producing spikes that reach from 3 to 6 ft. high, depending on var...
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Gladiolus callianthus
Abyssinian Sword Lily
From Africa. In late summer and fall, each 2 to 3-ft. stem bears two to ten fragrant, creamy white flo...
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Glaucium corniculatum
Red Horned Poppy
From Europe, southwest Asia. Grows 1 to 1 1/2 ft. high and as wide. Gray-green leaves are lobed or fin...
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Glebionis coronaria
Crown Daisy
Mediterranean native; sometimes seen naturalized on roadsides. To 2 1/2 ft. high and 1 1/2 ft. wide, w...
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Glechoma hederacea
Ground Ivy
Native to Europe, naturalized in North America. To 3 in. high, with stems trailing to 1 1/2 ft., rooti...
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Gleditsia triacanthos
Honey Locust
Central and eastern North America. Fast growing to 35–70 ft. tall and 25–35 ft. wide, with...
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Gleditsia triacanthos inermis
Honey Locust
Central and eastern North America. This is a thornless form, and a better choice for gardens, normally...
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Gomphrena globosa
Globe Amaranth
Native to Central America. White, pink, lavender, or purple flower heads arise on 1- to 2-ft. stems.
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