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Black-eyed Susan - Rudbeckia hirta


Family: Asteraceae - Aster family Genus Common Name: Coneflower Native Status: NativeDicot Annual Biennial Perennial Herb
Rudbeckia hirta - Black-eyed Susan. Black-eyed Susan is a commonly seen but uncommonly beautiful wildflower found along roadsides and open areas throughout much of the United States, missing only in Alaska, Arizona, Hawaii, and Nevada.

Found in:
AK, AL, AR, CA, CO, CT, DC, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY

Journal Articles Referencing Coneflower

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Rudbeckia hirta

Distribution of Rudbeckia hirta in the United States and Canada:
USDA Plants Distribution Map temporarily unavailable.
Blue=Native; Grey=Introduced

Map from USDA Plants Database:
USDA, NRCS. 2017. The PLANTS Database (http://plants.usda.gov, 25 Jun 2017). National Plant Data Team, Greensboro, NC 27401-4901 USA.

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Site: Walker County, GA Date: 2009-June-06Photographer: Gerald C Williamson
Nikon D60
1/40f/8 200
Tamron SP 90MM f/2.8 AF Macro
90mm (135 equiv) Flash: Yes
An identifying characteristic of Rudbeckia hirta versus similar Rudbeckia species is the bristly-hairy stem and leaves, which serve to help prevent ants from getting to the blossom. This allows the preferred pollenators to come onboard without fear of molestation.
Rudbeckia hirta

Site: Big Frog Mountain, Polk County, TN Date: 2004-June-12Photographer: Gerald C Williamson
Black-eyed Susan ray flowers are typically an inch or longer, helping to distiguish Rudbeckia hirta from the similar R. fulgida (Orange Coneflower) and R. triloba (Browneyed Susan.)
Rudbeckia hirta

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All content except USDA Plants Database map Copyright Gerald C. Williamson 2017
Photographs Copyright owned by the named photographer