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Plants A-Z

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Common Name | Botanical Name

Orris

Iris pallida

From southern Europe, this 4-ft.-tall rhizomatous iris has branching stems and blue flowers with a yel...

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Osage Orange

Maclura pomifera

Native from Arkansas to Oklahoma and Texas. Fast growth to 60 ft. tall and 40 ft. wide (though often l...

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Oemleria cerasiformis, photo courtesy of Mark Turner

Oso Berry

Oemleria cerasiformis

In damp woodlands and meadows in the Northwest and in parts of California, oso berry’s tiny, almond-sc...

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Ostrich fern (Matteuccia struthiopteris)

Ostrich Fern

Matteuccia struthiopteris

Native to northern regions of North America, Europe, Asia. Is hardy to extreme cold and does not grow ...

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Ox-Eye Daisy

Chrysanthemum leucanthemum

European native naturalized in many places; spreads by rhizomes and self-seeding. To 2 ft. high, 1 ft....

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Heliopsis helianthoides ‘Loraine Sunshine’, photo courtesy of Thomas J. Story

Ox-eye Sunflower

Heliopsis helianthoides

Native to the eastern half of North America, extending southwest to Arizona. The species is rarely off...

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Oyama Magnolia

Magnolia sieboldii

Maturing at just 6 to 15 ft. high and wide, this is a good magnolia for small gardens. Buds look like ...

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Ozark Sundrops

Oenothera macrocarpa

Native to south-central U.S. Grows 6 in. tall and 2 ft. wide, with narrow, lance-shaped leaves to 3 in...

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