rudbeckia


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rudbeckia

(rədbĕk`ēə): see black-eyed Susanblack-eyed Susan
or yellow daisy,
North American daisylike wildflower (Rudbeckia hirta) of the family Asteraceae (aster family) with yellow rays and a dark brown center. It is a weedy biennial or annual and grows in dry places.
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Rudbeckia

 

(coneflower), a genus of annual, biennial, or perennial herbs of the family Compositae. (The genus is sometimes combined with the genus Echinacea.) The stems are usually tall, and the leaves are entire or pinnatipartite to pinnatisect. The inflorescences are large heads. The torus, which initially is extremely convex and later becomes cylindrical, has sharp, scarious bracts. The ligulate flowers are fruitless and usually yellow or orange in color; the tubular flowers are bisexual, flower-bearing, and usually purple. The achenes have no pappus and sometimes have a small crown.

There are approximately 30 species, distributed in North America, primarily on the prairies. Many species are ornamentals. The most frequently cultivated species among the annual and biennial species are R. bicolor and the black-eyed Susan (R. hirta)—especially their varieties with combined yellow, purple, and brown ligulate flowers. Of the perennial species, the golden glow (R. laciniata)—especially its double-petal variety—is most frequently cultivated. The golden glow reaches a height of 1.5–2.5 m. Many new improved varieties, mainly hybrids of R. nitida and R. fulgida, are being raised.

REFERENCE

Mnogoletnie tsvety otkrytogo grunta. Moscow, 1959. [22–1029—]

rudbeckia

indicates fairness. [Flower Symbolism: Flora Symbolica, 177]
See: Justice
References in periodicals archive ?
To order by debit/credit card, call 0843 922 5000, quoting DMTG051, or send a cheque made payable, using blue or black ink, to Garden Offers, Rudbeckia Goldsturm Offer (DMTG051), PO Box 64, South West District Office, Manchester, M16 9HY or visit mirrorgardenoffers.co.uk.
The flowers of Rudbeckia maxima are nearing the conclusion of their season of bloom, but a few are still sitting atop giant stalks rising from huge powdery-blue basal foliage.
It's easy to prolong the season with dahlias, heleniums, rudbeckias and a host of other bright blooms.
To the best of our knowledge, no study has reported in literature on the chemical composition and antioxidant activity of Rudbeckia triloba.
Rudbeckia "Rustic Dwarfs" present warm shades in mahogany and gold, with ink-black hearts, making them ideal for a contrast for brighter colours in the border.
Gloriosa daisy, a favorite of flower gardeners, is a tall cultivar of Rudbeckia hirta.
Rudbeckia amplexicaulis Vahl is not native to Tennessee but is widely planted in the state (Tennessee Department of Transportation, 2003); it is native to southeastern United States (Kartesz and Meacham, 1999).
Rudbeckia Goldsturm, which produces large yellow daisy blooms with contrasting black centres, makes a perfect partner for old-fashioned Michaelmas daisies.
Many of our mainstay border perennials come from North America - heleniums, with their yellow door-knob centres, the helianthus, perennial sunflowers, many reaching 2m high, and rudbeckias.
Although it's too late to sow them for this year, it's worth considering making a splash next year with Rudbeckia hirta 'Rustic Dwarfs Mixed'.
Rudbeckia hirta is one of the most widely cultivated groups with large showy single or semi double flowers and long hairy leaves.
I find myself engaging in conversation with strangers whose gardens I admire and often coming away with a handful of seeds to propagate myself: cleome, or cat's whiskers; rudbeckia, or black-eyed Susan; salvia, both red and blue; gallardia, the gorgeous purple daisy-like flowers; clary sage and garden sage; basil and calendula and pot marigold; all sorts of minds and lambsears and poppies and hollyhocks and lemon balm ...