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Flaxleaf Fleabane

Erigeron bonariensis (eh-RI-jeh-ron boh-nair-ee-EN-sis)

Family: Asteraceae Unknown

The common name, Hairy Fleabane is derived from the stiff bristles that are found on the stems, leaves and flowers of this plant. It has been thought that this plant, as well as other varieties of Erigeron could be used as a means of repelling fleas. That myth has proven to be incorrect, but the common names referring to fleas is still in use. Native to tropical America, this weed has spread to Europe, Africa, and Asia, as well as a few parts of the US. The plant is rarely found in North Carolina. It is a rapidly growing summer annual or biennial weed in the Asteraceae (daisy) family. It can be found in disturbed sides, roadsides, urban areas, and cultivated fields and even in the cracks in pavement. Considered weedy, it spreads when its fluffy seeds are blown by the wind, washed into the surrounding area by rainwater and by human activity. Seeds that are spread remain viable for up to 3 years. Elimination of this weed allows other more valued natives to survive, however, is curtailed by the plants' resistance to some herbicides. In commercial sites, such as orchards, its weedy nature has become problematic, interfering with the crops being grown. In South America, it is a host for the lettuce mosaic virus, affecting the yield produced. Flowers form in clusters that can bloom year-round. It is not recommended as an addition to any garden or natural setting. Insects, Diseases, and Other Plant Problems: This plant is considered to be invasive. Dermatitis can occur when contact with any part of the plant is made. More information on Erigeron .

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 56 attributes.

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Often confused with Erigeron canadensis Senecio vulgaris

Full plant profile

Growing Conditions
Plant type
Weed
Life cycle
Annual
Light
Full sun (6 or more hours of direct sunlight a day)
Soil texture
Clay; High Organic Matter; Sand
Soil drainage
Occasionally Dry | Very Dry
Available space
12 inches-3 feet
Growth rate
Rapid
Maintenance
High
Form & Appearance
Habit / form
Dense; Erect
Texture
Coarse
Leaf color
Blue; Gray/Silver; Green
Leaf type
Simple
Leaf arrangement
Alternate
Leaf shape
Elliptical; Linear
Leaf margin
Dentate; Entire; Lobed; Serrate
Leaf feel
Soft
Leaf size
3-6 inches long, < 1 inch wide
Hairs present
Yes
Leaf detail
Gray-green leaves entire to slightly toothed. Basal leaves as well as alternating leaves along the stems.
Flower color
Cream/Tan; Gold/Yellow; Green
Flower form
Head; Panicle
Flower size
< 1 inch
Flower detail
Head flowers are found on the end of stems with a green, cup-shaped base formed by bracts that overlap. It tapers toward the top with small, yellow disk flowers surrounded by cream-colored bristles.
Bloom time
Summer
Fruit color
Cream/Tan
Fruit type
Achene
Fruit size
< 1 inch long, < 1 inch wide
Fruit detail
Looks like a small dandelion “puffball” of fruits forming a fuzzy, spherical, cream-colored "head". Fruits and seeds are tiny, narrow, football-shaped, or oblong, and approximately 1/17 of an inch
Stem color
Gray/Silver
Stem detail
Its erect stems are striated and covered with stiff hairs.
Wildlife & Ecology
Native status
Unknown
Origin
Mexico, Central America & South America
Distribution
Oregon & the Gulf states; rare in NC.
Food & Medicine
Harvest time
Fall; Summer
Fruit type
Achene

Uses (ethnobotany)

weed

Landscape Use
Garden tags
#summer annual weed #gray-green leaves #high maintenance #contact dermatitis #fast growing #naturalizes #self-seeding #dry soils tolerant #aggressive #weedy #poor soil tolerant
Problems & Resistance
Problems
Contact Dermatitis
Propagation
Seed
Poison severity
Low
Poison symptoms
Causes contact dermatitis
Toxic principle
Sesquiterpene lactones
Contact dermatitis
Yes
Toxicity summary
Low severity poison; contact dermatitis

Planted at Hunnicutt

Nobody’s planted this one yet.