Symphyotrichum robynsianum

Symphyotrichum robynsianum (syn. Aster robynsianum) is a species of flowering plant in the family Asteraceae native to northeastern North America. Common names include Robyn's aster[2] and long-leaved aster.[3]

Symphyotrichum robynsianum

Secure  (NatureServe)[1]
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Symphyotrichum
Species:
S. robynsianum
Binomial name
Symphyotrichum robynsianum
(J.Rousseau) Brouillet & Labrecque
Synonyms
  • Aster robynsianum

Description
S. robynsianum gone to seed, Ontario, Canada

S. robynsianum is a perennial, herbaceous species with long rhizomes and erect stems 10-80 cm high. The stiff narrow leaves are slightly toothed or entire. Flowers may be produced from August to September. The flower heads are located singly or in groups of up to three on leafy branches. The ray florets are dark blue-violet and the disc florets are yellow.[2]

Taxonomy

Symphyotrichum robynsianum was formerly included in the large genus Aster as Aster robynsianum. However, this broad circumscription of Aster is polyphyletic and the North American asters are now mostly classified in Symphyotrichum and several other genera.[4] No subspecies or varieties have been recognised within Symphyotrichum robynsianum.

This species has often gone by the name Aster longifolius, but the type specimen for that name is a specimen of Symphyotrichum novi-belgii, and as such that name cannot be used for the plants now called S. robynsianum. In 1957, Jacques Rousseau, a Quebecois ethnobotanist, described Aster robynsianum based on a specimen from central Quebec, naming it after Walter Robyns, a director of the National Botanic Garden of Belgium.[5][6] The name Symphyotrichum robynsianum was first used in 1997 by Luc Brouillet and Jacques Labrecque.[6]

Symphyotrichum robynsianum may have originated as hybrid between two other aster species, but its origin is not well understood.[6]

Distribution and habitat

Symphyotrichum robynsianum is native to Manitoba, Ontario, Quebec, Michigan, Minnesota and Wisconsin.[2] It is typical of moist, open, sandy, gravelly or rocky habitats such as river and lake shores and alvars.[2] It is usually associated with calcareous habitats.[6]

References
  1. "Symphyotrichum robynsianum". NatureServe Explorer. Retrieved 3 February 2020.
  2. Brouillet, Luc; Semple, John C.; Allen, Geraldine A.; Chambers, Kenton L.; Sundberg, Scott D. (2006). "Symphyotrichum robynsianum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). 20. New York and Oxford – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  3. Reznicek, A. A.; Voss, E. G.; Walters, B. S., eds. (February 2011). "Symphyotrichum robynsianum". Michigan Flora Online. University of Michigan Herbarium.
  4. Semple, J. C. "An overview of "asters" and the Tribe Astereae". University of Waterloo. Retrieved 22 January 2020.
  5. "Jacques Rousseau". Collections and Archives of the Library - Montreal Botanical Garden. Jardin Botanique de Montreal. Retrieved 3 February 2020.
  6. Brouillet, Luc; Labrecque, Jacques (1997). "New Combinations in Symphyotrichum (Syn. Aster, Asteraceae: Asterae) Species from Northeastern North America". Phytologia. 82 (3): 137–141. doi:10.5962/bhl.part.28862.


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