Rudbeckia species

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Scientific Name Rudbeckia hirta USDA PLANTS Symbol
Common Name Brown-eyed Susan, Black-eyed Susan ITIS Taxonomic Serial No.
Family Asteraceae (Sunflower) SEINet Reference
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Description Habitat: Various, usually sandy soils of fields, pastures, open areas.
Plant: Erect annual or short-lived perennial, 12 to 40 inches tall, often in showy colonies.
Leaves: Basal and stem (alternate), ovate to oblanceolate (not lobed), 4 to 7 inches long covered with coarse hairs.
Inflorescence: Large composite flowers 2-1/2 inches across with 8 to 16 yellow rays around often-flattened dome-shaped dark brown or black disk. Ray flowers may have darker spots near bases.
Bloom Period: April to August or later.
References: "Wildflowers of Texas" by Geyata Ajilvsgi and "Wildflowers of the Texas Hill Country" by Marshall Enquist.
Texas Status
Scientific Name Rudbeckia maxima USDA PLANTS Symbol
Common Name Giant Coneflower, Great Coneflower ITIS Taxonomic Serial No.
Family Asteraceae (Sunflower) SEINet Reference
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Description Habitat: Low, moist ares in ditches, fencerows, edges of woodlands. Native to East Texas.
Plant: Very tall (3 to 4 feet or more), erect, smooth, leafy perennial, often in colonies.
Leaves: Large bluish-green leaves, basal and stem (alternate, clasping), elliptic to obovate, up to 8 inches long.
Inflorescence: Large composite flowers 5 inches across with 10 to 20 yellow rays around central structure up to 3 inches tall comprising hundreds of dark brown disk florets.
Bloom Period: May to June.
References: "Wildflowers of Texas" by Geyata Ajilvsgi.
Texas Status

© Tom Lebsack 2019