Rudbeckia maxima Nutt.
Giant Coneflower, Great Coneflower, Giant Brown-eyed Susan
Asteraceae (Aster Family)
USDA Symbol: ruma3
Giant brown-eyed Susan has clumps of silvery-blue foliage that give rise to stately flower stalks. The flowers have intense yellow ray flowers that dangle from tall brown centers. It should be cut back to the base after blooming to keep tidy and be planted in mass for best effect in landscapes.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Size Notes: 3-6 feet
Size Class: 3-6 ft.
Bloom InformationBloom Color: Yellow
Bloom Time: Jul , Aug , Sep
DistributionUSA: AR , LA , OK , SC , TX
Native Distribution: L48(N)
Native Habitat: Found in moist open places. Forming beds in low ground, sandy or silty soils; east Texas west to East Cross Timbers. Seems pretty drought resistance despite its swampy origins.
Growing ConditionsWater Use: High
Light Requirement: Sun , Part Shade
Soil Moisture: Moist
CaCO3 Tolerance: Low
Drought Tolerance: Low
Conditions Comments: The flowers have intense yellow petals that dangle from tall brown centers. Clumps of silvery-blue foliage give rise to stately flower stalks.
BenefitUse Ornamental: Makes a good cut flower.
Conspicuous Flowers: yes
Interesting Foliage: yes
Value to Beneficial InsectsSpecial Value to Native Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
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National Wetland Indicator Status
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Lady Bird Johnson Wildflower Center - Austin, TX
Texas Discovery Gardens - Dallas, TX
NPSOT - Austin Chapter - Austin, TX
NPSOT - Williamson County Chapter - Georgetown, TX
Mt. Cuba Center - Hockessin, DE
Wildflower Center Seed BankLBJWC-1066 Collected 2007-07-22 in Harrison County by Lady Bird Johnson Wildflower Center
BibliographyBibref 1620 - Gardening with Native Plants of the South (Reprint Edition) (2009) Wasowski, S. with A. Wasowski
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Additional resourcesUSDA: Find Rudbeckia maxima in USDA Plants
FNA: Find Rudbeckia maxima in the Flora of North America (if available)
Google: Search Google for Rudbeckia maxima
MetadataRecord Modified: 2013-09-11
Research By: TWC Staff