Native Plants
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Rudbeckia grandiflora
Rudbeckia grandiflora (D. Don) J.F. Gmel. ex DC.
Rough Coneflower, Tall Coneflower, Largeflower Coneflower
Asteraceae (Aster Family)
Synonym(s):
USDA Symbol: RUGR
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).
Plant Characteristics
Duration: PerennialHabit: 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 , YellowBloom Time: Apr , May , Jun , Jul , Aug
Distribution
USA: AR , GA , IL , KS , KY , LA , MO , MS , OH , OK , TXCanada: ON
Growing Conditions
Light Requirement: SunSoil Moisture: Moist
Benefit
Conspicuous Flowers: yesValue to Beneficial Insects
Special Value to Native BeesThis information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
Bibliography
Bibref 248 - Texas Wildflowers: A Field Guide (1984) Loughmiller, C. & L. LoughmillerSearch 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 PlantsFNA: Find Rudbeckia grandiflora in the Flora of North America (if available)
Google: Search Google for Rudbeckia grandiflora
Metadata
Record Modified: 2023-01-13Research By: TWC Staff