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Symphyotrichum praealtum var. praealtum (Willowleaf aster)
Flaigg, Norman G.

Symphyotrichum praealtum var. praealtum

Symphyotrichum praealtum (Poir.) G.L. Nesom var. praealtum

Willowleaf Aster, Tall Aster

Asteraceae (Aster Family)

Synonym(s): Aster caerulescens, Aster coerulescens, Aster novi-belgii var. litoreus, Aster praealtus, Aster praealtus var. caerulescens, Aster praealtus var. imbricatior, Aster praealtus var. texicola, Aster salicifolius, Symphyotrichum novi-belgii var. litoreum, Symphyotrichum praealtum var. texicola


USDA Native Status: L48 (N), CAN (N)

Listed as a threatened species.


From the Image Gallery

4 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Size Notes: Up to about 6 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: White , Purple , Violet
Bloom Time: Aug , Sep , Oct , Nov


USA: AL , AR , CT , DE , FL , GA , IA , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MS , NH , NJ , NY , OH , OK , PA , RI , SD , TN , TX , VA , WI , WV
Canada: NB , ON

Growing Conditions

Water Use: Medium
Light Requirement: Sun , Part Shade
Soil Moisture: Moist
Soil Description: Sandy
Conditions Comments: Like almost all of our fall blooming wildflowers, Tall Asters are a very important source of nectar for migrating Monarch butterflies. Get them established, and you and the butterflies will enjoy them for years to come!


Use Wildlife: Tall Asters are a very important source of nectar for migrating Monarch butterflies.
Conspicuous Flowers: yes
Attracts: Butterflies
Nectar Source: yes

Value to Beneficial Insects

Special Value to Native Bees

This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Lady Bird Johnson Wildflower Center - Austin, TX


Bibref 318 - Native Texas Plants: Landscaping Region by Region (2002) Wasowski, S. & A. Wasowski
Bibref 286 - Wildflowers of the Texas Hill Country (1989) Enquist, M.

Search More Titles in Bibliography

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Symphyotrichum praealtum var. praealtum in USDA Plants
FNA: Find Symphyotrichum praealtum var. praealtum in the Flora of North America (if available)
Google: Search Google for Symphyotrichum praealtum var. praealtum


Record Modified: 2023-01-27
Research By: JMS

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