Achillea millefolium ‘Fire King’

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Yarrow
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This rhizomatous, mat-forming, upright, aggressive perennial produces strong red flowers in flat corymbs in summer atop finely-textured, aromatic foliage.

Achillea ‘Coronation Gold’

Photo/Illustration: 
Michelle Gervais
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Yarrow
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This 2.5- to 3-feet-tall and 1.5-foot wide plant produces dense, flat clusters of golden yellow flowers above fern-like, silvery foliage starting in early

Acidanthera bicolor var. murielae

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Abyssinian gladiolus
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Each flowering stem of this bulb produces eight to twelve flowers that open consecutively over a period of three to four weeks. The flowers are fragrant, white

Acorus calamus 'Variegatus'

Photo/Illustration: 
Michelle Gervais
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Variegated sweet flag
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Variegated sweet flag is a deciduous, aquatic perennial with 5-foot-long bright green leaves with creamy, longitudinal stripes. Its flowers are insignificant,

Acorus gramineus 'Ogon'

Photo/Illustration: 
Michelle Gervais
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Golden dwarf sweet flag
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This dwarf cultivar of grassy-leaved sweet flag (to 10 inches tall and 6 inches wide) has linear fans of semi-evergreen, glossy, pale green and cream-striped

Acorus gramineus 'Variegatus'

Photo/Illustration: 
Michelle Gervais
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Grassy-leaved sweet flag
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This aquatic perennial is semi-evergreen and showy, with grassy, striped foliage that reaches less than 1 foot tall. The species is native to East Asia. Use it

Actaea pachypoda

Photo/Illustration: 
Virginia Small
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White baneberry
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This 3-foot-tall and 2-foot-wide clumping perennial displays spiky racemes of white flowers in late spring and early summer followed by bright white berries

Actaea racemosa

Photo/Illustration: 
Michelle Gervais
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Black cohosh
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Actaea racemosa is a native woodland perennial with white, somewhat fuzzy flowers in midsummer that wave above astilbe-like, deeply cut foliage. The flowers

Actaea rubra

Photo/Illustration: 
Michelle Gervais
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Red baneberry
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Actaea rubra bears white flowers from spring to early summer on plants up to 2 feet tall and 1 foot wide. In late summer, glossy red berries develop. A few

Actaea simplex

Photo/Illustration: 
Courtesy of Monrovia
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Autumn bugbane
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This clumping woodland perennial with deep green foliage up to 4 feet tall and 2 feet wide bears spikes of  fragrant white flowers 1 to 2 feet

Actaea simplex 'Brunette'

Photo/Illustration: 
Todd Meier
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Baneberry
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This chocolate-leaved cultivar up to 4 feet tall and 2 feet wide bears compact spikes of white flowers in late summer. This plant may languish in very warm

Actaea simplex ‘Hillside Black Beauty’

Photo/Illustration: 
Bill Johnson
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Bugbane, Autumn snakeroot, black cohosh
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Unlike other bugbanes, 'Hillside Black Beauty' offers deep purple-black foliage. From late spring to late summer, its dark hue makes a wonderful backdrop for

Actinidia kolomikta

Photo/Illustration: 
Michelle Gervais
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Variegated kiwi vine
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Variegated kiwi vine is an attractive woody vine that tolerates shade. The male has lovely pink, white, and green variegated leaves and small flowers that are

Adiantum capillus-veneris

Photo/Illustration: 
Courtesy of San Marcos Growers
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Southern maidenhair fern
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The southern maidenhair fern has fluffy, airy, and elegant foliage, which works equally well in containers or in open ground. It's a perfect plant for

Adiantum pedatum

Photo/Illustration: 
Jennifer Benner
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Northern maidenhair fern
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Northern maidenhair fern's curved fronds have wiry black stems that wave in the wind. This plant spreads slowly (by branching rhizomes) and eventually

Adiantum pedatum ssp. aleuticum

Photo/Illustration: 
Jennifer Benner
()
Northern maidenhair fern
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This is an elegant, deciduous fern with medium green fronds on dark brown or black stalks with thick creeping rhizomes. It provides a distinct form in a

Adiantum venustum

Photo/Illustration: 
Steve Aitken
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Himalayan maidenhair fern
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Elegant, lacy foliage on black stems makes this maidenhair fern a standout, even among others in the genus. In addition, when new fronds emerge in late winter

Adina rubella

Photo/Illustration: 
Susan A. Roth
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Chinese buttonbush, glossy adina
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This 6- to 8-foot-tall, deciduous shrub is grown for its glossy leaves and spiky, round, creamy-white flowers that appear in early to midsummer.The flowers

Aeonium arboreum 'Zwartkop'

Photo/Illustration: 
Bill Johnson
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Black rose
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The "flowers" of black rose. are actually rosettes of burgundy-black leaves at the ends of stalklike stems. In winter, bright yellow flowers contrast with the

Aesculus parviflora

Photo/Illustration: 
Jennifer Benner
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Bottlebrush buckeye
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Large palmate-leaved shrub with showy white 12-inch-tall blooms in summer, followed by smooth-skinned fruit. Leaves emerge bronze and turn yellow in autumn.