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Symphyotrichum eulae (formerly Aster eulae) is a species of flowering plant in the family Asteraceae endemic to north-central Texas. Commonly known as Eula's aster or Texas aster, it is a perennial, herbaceous plant that may reach heights between 5 cm and 1.5 m. Usually, its flowers have white to bluish or lavender-white ray florets and yellow then reddish to brown disk florets. It is named for Eula Whitehouse, American botanist, botanical illustrator, and plant collector.

Description
S. eulae is a perennial, herbaceous plant that may reach heights between 5 cm and 1.5 m. It grows from a long and thick rhizome and forms colonies of plants that each have one to three or more erect, straight, and stout glabrous (hairless) stems.

Florets
Usually, its flowers have white to bluish or lavender-white ray florets and yellow then reddish to brown disk florets.

Chromosomes
S. eulae has a monoploid number (also called base number) of eight chromosomes The species is hexaploid with six sets of the chromosomes for a total chromosome count of 48.

Classification
Symphyotrichum eulae is classified in the subgenus Symphyotrichum, section Symphyotrichum, subsection Dumosi. It is one of the "bushy asters and relatives." Its basionym (original scientific name) is Aster eulae, and its name with author citations is Symphyotrichum eulae (Shinners) G.L.Nesom. Botanist Lloyd Herbert Shinners described the species in 1950, classifying it within the genus Aster.

Placement within Symphyotrichum

Etymology
The plant was named by Shinners for Eula Whitehouse, American botanist, botanical illustrator, and plant collector. Its common names are Eula's aster and Texas aster.



Distribution and habitat
endemic to Texas.

p. 36:

pp. 37–38: counties of specimens
 * BEXAR Bexar County, Texas
 * BRAZOS Brazos County, Texas (see herbarium specimen in article)
 * CALHOUN Calhoun County, Texas
 * COOKE Cooke County, Texas
 * DALLAS Dallas County, Texas
 * DENTON Denton County, Texas
 * HILL Hill County, Texas p. 36 TYPE
 * HOPKINS Hopkins County, Texas p. 36
 * HUNT Hunt County, Texas
 * KAUFMAN Kaufman County, Texas
 * NAVARRO Navarro County, Texas
 * ROCKWALL Rockwall County, Texas
 * TARRANT Tarrant County, Texas
 * WISE Wise County, Texas
 * WOOD Wood County, Texas p. 36

Conservation
, NatureServe listed Symphyotrichum eulae as Apparently Secure (G4) globally and the same (S4) in Texas. Data was provided by the Texas Parks and Wildlife Department Wildlife Diversity Branch. The global status of S. eulae was last reviewed by NatureServe on 1 February 1994.

Uses
Shinners reported "also in cultivation"