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Rudbeckia grandiflora (Rough coneflower)
Bransford, W.D. and Dolphia

Rudbeckia grandiflora

Rudbeckia grandiflora (D. Don) J.F. Gmel. ex DC.

Rough Coneflower, Tall Coneflower, Largeflower Coneflower

Asteraceae (Aster Family)



USDA Native Status: L48 (N), CAN (I)

The erect, coarse tall coneflower grows 2 1/2-5 feet tall and usually forms colonies. The stem and leaves have rough hairs. Leaves at the bottom of the plant have long petioles, but the higher ones attach directly to the main stem. They are 2 1/2-6 inches long and half as wide, shallow toothed with prominent ribs. Flower heads have 8-12 ray flowers, 3/4-1 inch long, yellow and drooping. The cones are 3/4-1 1/4 inches high, gray-green, but turning brown as the flowers mature. Honey bees, bugs, butterflies, and beetles feed on the nectar and pollen (248).


From the Image Gallery

24 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Size Notes: 2.5 - 5 feet
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: Red , Yellow
Bloom Time: Apr , May , Jun , Jul , Aug


USA: AR , GA , IL , KS , KY , LA , MO , MS , OH , OK , TX
Canada: ON

Growing Conditions

Light Requirement: Sun
Soil Moisture: Moist


Conspicuous Flowers: yes

Value to Beneficial Insects

Special Value to Native Bees

This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.


Bibref 248 - Texas Wildflowers: A Field Guide (1984) Loughmiller, C. & L. Loughmiller

Search More Titles in Bibliography

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Rudbeckia grandiflora in USDA Plants
FNA: Find Rudbeckia grandiflora in the Flora of North America (if available)
Google: Search Google for Rudbeckia grandiflora


Record Modified: 2023-01-13
Research By: TWC Staff

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