Symphyotrichum anticostense (formerly Aster anticostensis) is a species of flowering plant in the family Asteraceae with the common name of Anticosti aster. It is endemic to Quebec, New Brunswick, and Maine. S. anticostense is a perennial, herbaceous plant that may reach 10 to 90 centimeters (4 to 35 inches) in height. Its flowers have pale purple or lilac, sometimes white, ray florets and yellow, then reddish purple, disk florets.
| Symphyotrichum anticostense | |
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| S. anticostense in Quebec | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Subtribe: | Symphyotrichinae |
| Genus: | Symphyotrichum |
| Subgenus: | Symphyotrichum subg. Symphyotrichum |
| Section: | Symphyotrichum sect. Symphyotrichum |
| Species: | S. anticostense
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| Binomial name | |
| Symphyotrichum anticostense | |
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| Native distribution[3] | |
| Synonyms[2] | |
Description
editSymphyotrichum anticostense is a perennial, herbaceous plant that may reach 10 to 90 centimeters (4 to 35 inches) in height. It grows in clonal colonies from long rhizomes, each which produces one erect, red-toned, and hairless stem. Its flower heads are found in long and somewhat racemiform arrays. The involucre of each flower head is bell-shaped and 6–10 millimeters (0.24–0.39 inches) long. Its flowers have 25–44 pale purple or lilac, sometimes white, ray florets, size 9.5–20 mm (0.37–0.79 in) long by 0.7–1.4 mm (0.028–0.055 in) wide. The ray florets surround 29–52 yellow, maturing to reddish-purple, disk florets.[3]
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S. anticostense floret view -
S. anticostense involucre and phyllaries
Taxonomy
editSymphyotrichum anticostense is classified in the subgenus Symphyotrichum, section Symphyotrichum, subsection Symphyotrichum. The species' common name is "Anticosti aster".[3]
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Symphyotrichum
subg. Symphyotrichumsect. Conyzopsis[ref 2]: 271sect. Occidentales[ref 2]: 271sect. Turbinelli[ref 1]: 133sect. Symphyotrichum[ref 2]: 268Cladogram references
- ^ a b c d e Semple, J.C.; Heard, S.B.; Brouillet, L. (2002). "Cultivated and Native Asters of Ontario (Compositae: Astereae)". University of Waterloo Biology Series. 41. Ontario: University of Waterloo: 1–134.
- ^ a b c d e Nesom, G.L. (September 1994). "Review of the Taxonomy of Aster sensu lato (Asteraceae: Astereae), Emphasizing the New World Species". Phytologia. 77 (3) (published 31 January 1995): 141–297. ISSN 0031-9430. Retrieved 23 August 2021 – via Biodiversity Heritage Library.
Distribution and habitat
editSymphyotrichum anticostense is endemic to Quebec, New Brunswick, and Maine. It is a river and lake gravel shore plant that is conditioned to these calcareous habitats.[3]
Conservation
editSymphyotrichum anticostense is vulnerable for reasons including erosion, deer browsing, and invasive species encroachment. In Maine, it is critically endangered.[1]
Citations
editReferences
edit- Brouillet, L.; Semple, J.C.; Allen, G.A.; Chambers, K.L.; Sundberg, S.D. (5 November 2020). "Symphyotrichum anticostense". Flora of North America (floranorthamerica.org). Point Arena, California: Flora of North America Association. Retrieved 31 October 2024.
- NatureServe (1 September 2022). "Symphyotrichum anticostense Anticosti Aster". NatureServe Explorer (explorer.natureserve.org). Arlington, Virginia: NatureServe. Retrieved 22 September 2022.
- POWO (2022). "Symphyotrichum anticostense (Fernald) G.L.Nesom". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 22 September 2022.