Rudbeckia hirta

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Rudbeckia hirta
Black eyed susan 20040717 110754 2.1474.jpg
Rudbeckia hirta flowerhead
Scientific classification
Kingdom:Plantae
(unranked):Angiosperms
(unranked):Eudicots
(unranked):Asterids
Order:Asterales
Family:Asteraceae
Genus:Rudbeckia
Species:R. hirta
Binomial name
Rudbeckia hirta
L.
 
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Rudbeckia hirta
Black eyed susan 20040717 110754 2.1474.jpg
Rudbeckia hirta flowerhead
Scientific classification
Kingdom:Plantae
(unranked):Angiosperms
(unranked):Eudicots
(unranked):Asterids
Order:Asterales
Family:Asteraceae
Genus:Rudbeckia
Species:R. hirta
Binomial name
Rudbeckia hirta
L.

Rudbeckia hirta, commonly called black-eyed Susan, is a species of flowering plant in the family Asteraceae, native to the Eastern and Central United States. It is one of a number of plants with the common name black-eyed Susan. Other common names for this plant include: brown-eyed Susan, brown Betty, gloriosa daisy, golden Jerusalem,[1][2] Poorland daisy, yellow daisy, and yellow ox-eye daisy.

It is the state flower of Maryland.[3]

The plant also is a traditional Native American medicinal herb in several tribal nations;[4] believed in those cultures to be a remedy, among other things, for colds, flu, infection, swelling and (topically, by poultice) for snake bite (although not all parts of the plant are edible)[5]

Parts of the plant have nutritional value. Other parts are not edible.

Description[edit]

It is an upright annual (sometimes biennial or perennial) growing 30–100 cm (12–39 in) tall by 30–45 cm (12–18 in) wide. It has alternate, mostly basal leaves 10–18 cm long, covered by coarse hair, with stout branching stems and daisy-like, composite flowers appearing in late summer and early autumn. In the species, the flowers are up to 10 cm (4 in) in diameter, with yellow ray-florets circling conspicuous brown or black, dome-shaped disc-florets.[6] However, extensive breeding has produced a range of sizes and colors, including oranges, reds and browns.[7]

Etymology[edit]

The genus name honors Olaus Rudbeck, who was a professor of botany at the University of Uppsala in Sweden and was one of Linnaeus's teachers. The specific epithet refers to the trichomes (hairs) occurring on leaves and stems.[8]

Varieties[edit]

There are four varieties:

Cultivation[edit]

R. hirta is widely cultivated in parks and gardens, for summer bedding schemes, borders, containers, wildflower gardens, prairie-style plantings and cut flowers. Numerous cultivars have been developed, of which 'Indian Summer'[9] and 'Toto'[10] have gained the Royal Horticultural Society's Award of Garden Merit. Other popular cultivars include 'Double Gold' and 'Marmalade'.

Gloriosa daisies are tetraploid cultivars having much larger flowers than the species, often doubled or with contrasting markings on the petals. They were first bred by Alfred Blakeslee of Smith College by applying colchicine to R. hirta seeds; Blakeslee's stock was further developed by W. Atlee Burpee and introduced to commerce at the 1957 Philadelphia Flower Show.[11] Gloriosa daisies are generally treated as annuals or short-lived perennials and are typically grown from seed, though there are some named cultivars.

Symbolism and uses[edit]

Maryland state flower[edit]

This variety is the Maryland state flower[3] and is widely planted in gardens and used in ceremonies there. It also grows wild throughout much of the state.[3]

Symbol of Justice[edit]

Butterfly attractant for enhancing gardens[edit]

Traditional Native American medicinal uses[edit]

Nutritional parts[edit]

Cautions[edit]

Gallery[edit]

Notes[edit]

  1. ^ Dolgopolov, Y. (2004). A collection of confusable phrases: False 'friends' and 'enemies' in idioms and collocations. Coral Springs, FL: Llumina Press
  2. ^ http://www.collinsdictionary.com/dictionary/english/niggerhead
  3. ^ a b c d "MARYLAND AT A GLANCE: STATE SYMBOLS, Maryland State Flower - Black-Eyed Susan", Maryland State Archives, Maryland Manual Online, http://msa.maryland.gov/msa/mdmanual/01glance/html/symbols/flower.html
  4. ^ Moerman. D, "Native American Ethnobotany", Timber Press. Oregon. 1998 ISBN 0-88192-453-9
  5. ^ Moerman. D, "Native American Ethnobotany", Timber Press. Oregon. 1998 ISBN 0-88192-453-9
  6. ^ Floridata: Rudbeckia hirta.
  7. ^ RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 1405332964. 
  8. ^ Andy's Northern Ontario Wildflowers: Native Meadow Wildflowers. Black-eyed Susan.
  9. ^ "RHS Plant Selector - Rudbeckia hirta 'Indian Summer'". Retrieved 2 June 2013. 
  10. ^ "RHS Plant Selector - Rudbeckia hirta 'Toto'". Retrieved 2 June 2013. 
  11. ^ Lacy, Allen (July 21, 1988). "Gloriosa, the Eliza Doolittle of Daisies". New York Times. Retrieved 2013-10-22. 
  12. ^ "Fiscal and Policy Notes (HB 345)". Department of Legislative Services - Maryland General Assembly. 2010. Retrieved 2010-03-13. 
  13. ^ "Black Eyes Susan Wildflower". 
  14. ^ Schillo, Rebecca (2011). Cummings, Nina, ed. "Native Landscaping Takes Root in Chicago". In The Field: 13. 
  15. ^ Black-Eyed Susan
  16. ^ Herbs
  17. ^ Rudbeckia hirta
  18. ^ Moerman. D. Native American Ethnobotany Timber Press. Oregon. 1998 ISBN 0-88192-453-9
  19. ^ Cat.Inist
  20. ^ "List of plants toxic to cats". 

References[edit]