Symphyotrichum oolentangiense

Species category

Flower, Weed

Common name

skyblue aster

Diagnostic characters

Planting unit

AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.

Shape

Oblanceolate

Size

Length 2–2.7 mm
Width 0.8–1 mm
Thickness 0.8–1 mm

Color

Gray to white mottled

Texture

Rough

Other structures

There are four to five white longitudinal ribs.

Identification notes

A constriction is found below the pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma.
crown at the apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Asteraceae

Valid name

Symphyotrichum oolentangiense (Riddell) G.L. Nesom

Synonyms

Aster azureus Lindl.
Aster oolentangiensis Riddell
Aster oolentangiensis Riddell var. laevicaulis (Fernald) A.G. Jones
Symphyotrichum oolentangiense (Riddell) G.L. Nesom var. oolentangiense

Symphyotrichum oolentangiense. Achenes with four to five white longitudinal ribs.

SeedImages