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Weed Identification

white heath aster

Family

Asteraceae

Scientific Name

Symphyotrichum pilosum var. pilosum

Other Common Names:

frostweed aster
hairy white oldfield aster
pringle's aster

Synonyms (former Scientific Names):

Aster villosus
Aster juniperinus
Aster ramosissimus
Aster pilosus
Aster ericoides

Habit

Stem hairs are 2-3 mm long; plant reaches up to 3 ' tall.

Leaves

Leaves are linear, taper toward the tip, and have limited or no teeth. They are generally .4 to .8 inches long, stiff, entire to slightly-toothed, and have a stiff bristle or flexible point at the tip.

Identifying Characteristics

Very fuzzy stem, as if coated with a thick frost.

Flower Seed Head

Each compound flower is about 5 to 8 mm across and has 16-35 white ray florets with a yellow center.

Seed Fruit

The seeds have small tufts of white or brownish hairs, which are distributed by the wind.

Where Found

Dry soils of fallow fields, meadows, prairies, glades, rocky open ground, gravel bars, roadsides, railroads, waste ground, disturbed sites.

Growth Habit

upright and nonwoody

Thorns or Spines

not present

Approximate Flower Diameter

pencil

Dominant Flower Color

Varies: 
white
pink

Flower Symmetry

radial symmetery

Leaf Hairs

no hairs

Leaf Shape

Varies: 
lance
oval

Leaf Arrangement

alternate

Leaf Margin

Varies: 
entire
serrated

Leaf Structure

simple

Leaf Stalk

none

Stem Hairs

has hairs

Stem Cross Section

round or oval

Milky Sap

not present

Root Structure

Varies: 
fibrous
rhizomes present

Life Cycle

perennial

Ochrea

not present

Plant Type

Herb