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Rudbeckia hirta L.

Black-eyed Susan

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassAsteridaeA large class that encompasses asters
OrderAsteralesFlowering plants with a central disk flower and surrounding petals, like daisies
FamilyAsteraceaeThe aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers
GenusRudbeckiaNamed after the Swedish father and son who were professors of botany and predecessors of Linnaeus, Olaus Johannis Rudbeck (1630-1702) and Olaus Olai Rudbeck (1660-1740)
SpecieshirtaHairy

About plant names...

These cheerful North American natives brighten meadows wherever they crop up, which is practically everywhere. Perhaps this explains why they have so many common names. Black-eyed Susans are also popular with gardeners, and many cultivated varieties have been developed.

Identification: Plants are up to 3' (1 m) tall, but usually closer to half that height. The longest leaves are at the base, where they reach 4-7" (10-18 cm). The lower leaves are diamond-shaped, with three conspicuous veins. Leaves dwindle in size further up the stems, becoming lance-shaped and covered with fuzzy hairs. Attractive yellow ray flowers up to 3" (8 cm) in diameter appear atop hairy, rough-feeling stems. The centers are shaped a bit like a beehive, and composed of tiny dark brown or purplish disk flowers.

Online References:

Missouriplants.com

The Lady Bird Johnson Wildflower Center

Floridata.com

Illinois Wildflowers

Wikipedia

Plants for a Future, a resource and information centre for edible and otherwise useful plants

The USDA Forest Service's Fire Effects Information Database

EFloras

Rudbeckia hirta (black-eyed Susan)

Pearl crescent butterflies (Phyciodes tharos) like this one have a special affinity for these flowers. · 7/20/2013 · Wooden Bridge, East Pepperell, Mass­a­chu­setts
≈ 4 × 4" (10 × 10 cm)

Rudbeckia hirta (black-eyed Susan)

6/27/2016 · Nashua River Rail Trail, near Nashoba Hospital, Ayer, Mass­a­chu­setts

Rudbeckia hirta (black-eyed Susan)

6/27/2016 · Nashua River Rail Trail, near Nashoba Hospital, Ayer, Mass­a­chu­setts

Rudbeckia hirta (black-eyed Susan)

8/1/2009 · Gordon & Kathy’s, Prospect, Maine
≈ 15 × 10" (37 × 24 cm)

 

Rudbeckia hirta description by Thomas H. Kent, last updated 26 Jul 2023.

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Rudbeckia hirta (black-eyed Susan)

7/8/2016 · Dunstable Rural Land Trust, Dunstable, Mass­a­chu­setts

Rudbeckia hirta (black-eyed Susan)

7/11/2012 · Jeff Smith Trail, Pepperell, Mass­a­chu­setts
≈ 7 × 4½" (17 × 11 cm)

Rudbeckia hirta (black-eyed Susan)

7/8/2016 · Dunstable Rural Land Trust, Dunstable, Mass­a­chu­setts

Rudbeckia hirta (black-eyed Susan)

8/1/2009 · Gordon & Kathy’s, Prospect, Maine
≈ 5 × 3½" (13 × 8.8 cm)

Rudbeckia hirta (black-eyed Susan)

7/24/2013 · Beaver Brook Assn Conservation Lands, Rte. 130, Hollis, New Hamp­shire

Rudbeckia hirta (black-eyed Susan)

10/18/2008 · Kimball’s Ice Cream, Westford, Mass­a­chu­setts
≈ 18 × 27" (46 × 67 cm)

Rudbeckia hirta (black-eyed Susan)

6/11/2010 · Nashua River Rail Trail, Groton Center, Groton, Mass­a­chu­setts
≈ 3 × 4½" (7.5 × 11 cm)

Rudbeckia hirta (black-eyed Susan)

6/30/2010 · Nashua River Rail Trail, Groton Center, Groton, Mass­a­chu­setts
≈ 7 × 6" (17 × 14 cm)

Rudbeckia hirta (black-eyed Susan)

7/8/2016 · Dunstable Rural Land Trust, Dunstable, Mass­a­chu­setts

Rudbeckia hirta (black-eyed Susan)

8/1/2009 · Gordon & Kathy’s, Prospect, Maine
≈ 9 × 6" (22 × 15 cm)

Rudbeckia hirta (black-eyed Susan)

7/20/2023 · Curtis Farm Preserve, Harpswell, Maine

Range:

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