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Symphyotrichum robynsianum facts for kids

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Symphyotrichum robynsianum
Symphyotrichum robynsianum flowers.jpg
Conservation status

Secure (NatureServe)
Scientific classification
Genus:
Symphyotrichum
Species:
robynsianum
Synonyms
  • Aster 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 and long-leaved aster.

Description

Symphyotrichum robynsianum seedhead
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.

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. 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. The name Symphyotrichum robynsianum was first used in 1997 by Luc Brouillet and Jacques Labrecque.

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

Distribution and habitat

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

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