Symphyotrichum patens
# Symphyotrichum patens

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

## Description

Sympyotrichum patens is a perennial and herbaceous flowering plant usually between 10 and 100 centimeters (1⁄4 and 3+1⁄4 feet) tall. It has a spreading growth form, and the leaves are ovate to oblong and clasp the pubescent stem. 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.

* 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. 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. It was transferred to the genus Symphyotrichum in 1995 by American botanist Guy L. Nesom. It is closely related to Symphyotrichum georgianum and Symphyotrichum phlogifolium.

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

* Symphyotrichum patens var. gracile (Hook.) G.L.Nesom
* Symphyotrichum patens var. patentissimum (Lindl.) G.L.Nesom
* Symphyotrichum patens var. terranigrum J.J.N.Campb. & W.R.Seymour

## Distribution and habitat

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

## Conservation

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

## Citations

* 1 2 NatureServe 2021.
* 1 2 3 4 5 6 POWO 2019.
* 1 2 3 4 Campbell & Seymour 2014.
* 1 2 3 USDA 2014.
* 1 2 3 Brouillet et al. 2006.
* 1 2 Missouri Botanical Garden n.d.
* ↑ IPNI 2020a.
* ↑ IPNI 2020b.
* ↑ NC State Extension n.d.
