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(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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(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.


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


indicates fairness. [Flower Symbolism: Flora Symbolica, 177]
See: Justice
References in periodicals archive ?
An excellent colour scheme this time of year is Kniphofia Painted Lady and Rudbeckia Loofahsa Wheaten Gold.
It's easy to prolong the season with dahlias, heleniums, rudbeckias and a host of other bright blooms.
Many of these are daisies themselves - rudbeckias, heleniums and helianthus - whose overall impact can make the garden glow.
You can also enjoy Black-eyed Susans in your garden with a close relative, Rudbeckia fulgida Goldsturm.
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).
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.
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.
Very much in evidence now are echinacea, rudbeckia, heleniums and tall grasses.
Huge clouds of aster cordifolius x 'Coombe Fishacre' accompany rivers of rudbeckia.
BEST OF THE BUNCH - Rudbeckia Summer may be almost over, but zingy rudbeckias keep flower borders bright, with their daisy-like flowers and chocolate brown centres, blending beautifully as the colours in the garden change.