Symphyotrichum patens, commonly known as late purple aster or spreading aster, is a perennial, herbaceous plant found in the eastern United States.[4][5]

Description

Sympyotrichum patens is a perennial and herbaceous flowering plant usually between 10 and 100 centimeters (1⁄4 and 3+1⁄4 feet) tall.[5] It has a spreading growth form, and the leaves are ovate to oblong and clasp the pubescent stem.[5][6] The flowers are relatively small, less than 3 centimeters (1+1⁄4 inches) in diameter, with light blue to violet ray florets and yellow disk florets. It flowers between August and October.[6]

  • Leaf front
  • Leaf back
  • Inflorescence
  • Involucre
  • Flower heads

Taxonomy

The title of a review of the Symphyotrichum patens complex begins with "Another review..." as a nod to the complexity of the topic.[3] The species was first formally described and named Aster patens by Swedish botanist Jonas Carlsson Dryander and published by Scottish botanist William Aiton in 1789.[7] It was transferred to the genus Symphyotrichum in 1995 by American botanist Guy L. Nesom.[8] It is closely related to Symphyotrichum georgianum and Symphyotrichum phlogifolium.[3]

Several varieties have been named, with the basionym as Symphyotrichum patens var. patens:

Distribution and habitat

A widely distributed species, S. patens ranges from southern Maine, south and west to eastern Texas.[4] Plants are typically found in sunny to mostly sunny sites, including open woodlands.[9]

Conservation

As of July 2021, NatureServe listed Symphyotrichum patens as Secure (G5) worldwide and Possibly Extirpated (SX) in Maine.[1]

Citations

  1. ^ a b NatureServe 2021.
  2. ^ a b c d e f POWO 2019.
  3. ^ a b c d Campbell & Seymour 2014.
  4. ^ a b c USDA 2014.
  5. ^ a b c Brouillet et al. 2006.
  6. ^ a b Missouri Botanical Garden n.d.
  7. ^ IPNI 2020a.
  8. ^ IPNI 2020b.
  9. ^ NC State Extension n.d.

References

Allikas: https://en.wikipedia.org/wiki/Symphyotrichum_patens
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