Rudbeckia triloba L.
Browneyed Susan, Brown-eyed-susan, Thin-leaved Coneflower, Three-lobed Rudbeckia
Asteraceae (Aster Family)
USDA Symbol: RUTR2
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Size Notes: Up to about 5 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom InformationBloom Color: Red , Yellow , Brown
Bloom Time: Jun , Jul , Aug , Sep , Oct , Nov
DistributionUSA: AL , AR , CO , CT , DC , DE , FL , GA , IA , IL , IN , KS , KY , LA , MA , MD , MI , MN , MO , MS , NC , NE , NJ , NY , OH , OK , PA , SC , TN , TX , UT , VA , VT , WI , WV
Canada: ON , QC
Native Distribution: NY to GA, s. to s. MN, w. IA, e. NE & OK; escaping northeastward
Native Habitat: Open, moist woods
Growing ConditionsLight Requirement: Sun , Part Shade
Soil Moisture: Dry , Moist
Drought Tolerance: High
Soil Description: Moist soils.
Conditions Comments: Drought-tolerant and adapts to several hours of shade.
BenefitConspicuous Flowers: yes
PropagationPropagation Material: Seeds
Description: Propagates very easily from seed sown in fall or spring. Large plants with numerous overlapping basal leaves, all from a single woody crown, may be divided in late winter or early spring
Seed Collection: The nutlets turn charcoal-gray at maturity, usually 3-4 weeks after the bloom period. Seeds are mature at this time, but they are easier to collect after cones lose their tight compact stucture. Store dry in sealed, refrigerated containers.
Find Seed or Plants
Find seed sources for this species at the Native Seed Network.
Mr. Smarty Plants says
Native flowers for Door County, Wisconsin
September 02, 2009
We recently were required to put in a new septic system on our vacation property in Door County, WI. This left us with a clearing on our wooded lot where the septic field is now located. The installer...
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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:
Native Plant Center at Westchester Community College, The - Valhalla, NY
Pineywoods Native Plant Center - Nacogdoches, TX
Native Seed Network - Corvallis, OR
Mt. Cuba Center - Hockessin, DE
BibliographyBibref 1620 - Gardening with Native Plants of the South (Reprint Edition) (2009) Wasowski, S. with A. Wasowski
Bibref 1294 - The Midwestern Native Garden: Native Alternatives to Nonnative Flowers and Plants An Illustrated Guide (2011) Adelman, Charlotte and Schwartz, Bernard L.
Search More Titles in Bibliography
Web ReferenceWebref 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 resourcesUSDA: Find Rudbeckia triloba in USDA Plants
FNA: Find Rudbeckia triloba in the Flora of North America (if available)
Google: Search Google for Rudbeckia triloba
MetadataRecord Modified: 2023-01-13
Research By: TWC Staff