Thin-leaf coneflower (Rudbeckia triloba, Sp. Pl.: 907 (1753))

Family: Asteraceae

Author: L.

Bibliography: Sp. Pl.: 907 (1753)

Year: 1753

Status: accepted

Rank: species

Genus: Rudbeckia

Vegetable: False

Observations: E. Canada to U.S.A.

Description

Thin-leaf coneflower is a striking and resilient perennial known for its vibrant display of bright yellow blooms. Scientifically recognized as Rudbeckia triloba, this plant was first described by the renowned botanist Carl Linnaeus in the seminal work “Species Plantarum,” published in 1753.

Hailing from the family Asteraceae, Thin-leaf coneflower is widely appreciated for its delicate and profusely branched stems which support an abundance of small, daisy-like flowers. These blossoms, characterized by their thin, extended petals and dark brown, dome-shaped centers, create a stunning contrast and add a cheerful pop of color to gardens and wildflower meadows alike.

Native to Eastern Canada and the United States, Rudbeckia triloba thrives in various habitats ranging from woodland edges to open fields, often found flourishing in sunny spots with well-drained soils. Its adaptability and hardiness make it a preferred choice for both wild and cultivated landscapes. Not only is it visually appealing, but it also plays a crucial ecological role, attracting pollinators such as bees, butterflies, and other beneficial insects.

In cultivation, Thin-leaf coneflower is celebrated for its minimal care requirements. It prefers full sun to partial shade and shows remarkable tolerance to drought once established. Gardeners often value it for its long blooming period, which typically extends from late summer into early autumn, ensuring continued color and interest in the garden as the seasons change.

Beyond its ornamental value, Rudbeckia triloba has a reputation for its robust nature, often displaying resistance to common pests and diseases that trouble other garden plants. This resilience, coupled with its beauty and ecological benefits, makes the Thin-leaf coneflower a beloved and practical addition to any planting scheme.

Common Names

Eng: brown-eyed-susan, brown-eyed susan, browneyed susan, thin-leaf coneflower, three-lobe coneflower, thin-leaved coneflower, brown-eyed coneflower, many-flowered coneflower
Deu: dreilappen-sonnenhut, dreilappiger sonnenhut
Swe: trefliksrudbeckia
Fra: rudbeckie trilobée
En: Thin-leaf coneflower, Three-lobe coneflower, Brown-eyed-Susan, Browneyed Susan, Brown-eyed Susan, Thin-leaved Coneflower, Brown-eyed coneflower, Many-flowered coneflower
Fr: Rudbeckie trilobée
De: Dreilappen-Sonnenhut, Dreilappiger Sonnenhut
Sv: Trefliksrudbeckia
: Browneyed susan

Synonyms

• Centrocarpha triloba ((L.) Sweet)

Distribution

• Alabama (native)
• Arkansas (native)
• Colorado (native)
• Connecticut (native)
• Delaware (native)
• Florida (native)
• Georgia (native)
• Illinois (native)
• Indiana (native)
• Iowa (native)
• Kansas (native)
• Kentucky (native)
• Louisiana (native)
• Maryland (native)
• Masachusettes (native)
• Michigan (native)
• Minnesota (native)
• Mississippi (native)
• Missouri (native)
• Nebraska (native)
• New Jersey (native)
• New York (native)
• North Carolina (native)
• Ohio (native)
• Oklahoma (native)
• Ontario (native)
• Pennsylvania (native)
• Québec (native)
• Tennessee (native)
• Texas (native)
• Utah (native)
• Vermont (native)
• Virginia (native)
• West Virginia (native)
• Wisconsin (native)
• Austria (introduced)
• Great Britain (introduced)
• Romania (introduced)
• Ukraine (introduced)

Additional Images

Habit

Taken Sep 15, 2022 by Cécile LM (cc-by-sa)

Taken Aug 12, 2022 by manuseitz (cc-by-sa)

Taken Sep 7, 2022 by Kai Best (cc-by-sa)

Taken Sep 15, 2022 by Jacques Zuber (cc-by-sa)

Taken Sep 15, 2022 by Sunny Taylor (cc-by-sa)

Leaf

Taken Sep 15, 2022 by Sunny Taylor (cc-by-sa)

Taken Aug 8, 2022 by Erin Brink (cc-by-sa)

Taken Aug 8, 2022 by Erin Brink (cc-by-sa)

Taken Aug 1, 2020 by cassandra Kelly (cc-by-sa)

Taken Sep 19, 2021 by Anne Altstatt (cc-by-sa)

Flower

Taken Aug 1, 2020 by cassandra Kelly (cc-by-sa)

Taken Sep 4, 2021 by frank key (cc-by-sa)

Taken May 5, 2021 by Erayle Amacker (cc-by-sa)

Taken Aug 21, 2019 by Regan Hachey (cc-by-sa)

Taken Aug 7, 2021 by Rena Woode (cc-by-sa)

Bark

Taken Sep 10, 2020 by Papini Giacomo (cc-by-sa)

Taken Jul 28, 2020 by Theresa LeClair (cc-by-sa)

Taken Jul 10, 2003 by EOL − Steven J. Baskauf (cc-by-nc-sa)

Taken Aug 12, 2022 by manuseitz (cc-by-sa)

Taken Sep 24, 2022 by Tristan Jaton-Maria (cc-by-sa)

Fruit

Taken Oct 13, 2021 by Jacques Zuber (cc-by-sa)

© copyright of the Board of Trustees of the Royal Botanic Gardens, Kew.

© copyright of the Board of Trustees of the Royal Botanic Gardens, Kew.

© copyright of the Board of Trustees of the Royal Botanic Gardens, Kew.

Sources

• WFO (No URL)
• IPNI (No URL)
• GBIF (https://www.gbif.org/species/3114238)
• POWO (http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:241776-1)
• PlantNet (https://identify.plantnet.org/species/the-plant-list/Rudbeckia triloba L.)

Specifications

Growth habit>: Forb/herb

Growth