Home & Lifestyle >
Rudbeckia hirta (common names :Black-eyed Susan, Blackiehead,
Brown Betty, Brown Daisy, Brown-eyed Susan, Gloriosa Daisy, Golden
Jerusalem, Poorland Daisy, Yellow Daisy, Yellow Ox-eye Daisy) is a
flowering plant in the family Asteraceae. It is an upright annual
(sometimes biennial or perennial) native to most of North America,
and is one of a number of plants with the common name Black-eyed
Susan that also has purple on the side.
Identifying Black-eyed Susans:
The plant can reach a height of 1-2 m. It has
alternate, mostly basal leaves 20-75 cm long, covered by coarse
hair. It flowers from June to August, with inflorescences measuring
10-15 cm in diameter (up to 30 cm in some cultivars), with yellow
ray florets circling a brown, domed center of disc florets.
There are four varieties:
- Rudbeckia hirta var. angustifolia. Southeastern
United States (South Carolina to Texas).
- Rudbeckia hirta var. floridana. Florida,
- Rudbeckia hirta var. hirta. Northeastern United
States (Maine to Alabama).
- Rudbeckia hirta var. pulcherrima. Widespread in
most of North America (Newfoundland to British Columbia, south to
Alabama and New Mexico; naturalized Washington to California).
The roots of Rudbeckia hirta have been used in a warm infusion
to wash on sores and snake bites, and to make medicinal drinks for
treating colds and worms in children. Ooze from the roots had been
used as drops for earaches.
Black-eyed Susan was designated the state Floral Emblem of
Maryland in 1918.