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Rudbeckia species [Asteraceae]

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Scientific Name Rudbeckia hirta USDA PLANTS Symbol RUHI2
Common Name Brown-eyed Susan, Black-eyed Susan ITIS Taxonomic Serial No. 36765
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.
BONAP Distribution Map

Texas Status:
Native
Scientific Name Rudbeckia maxima USDA PLANTS Symbol RUMA3
Common Name Giant Coneflower, Great Coneflower ITIS Taxonomic Serial No. 36776
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.
Note: These imnages are from the Wildflower Center in Austin; R. maxima is not native to the area.
BONAP Distribution Map

Texas Status:
Native

© Tom Lebsack 2022