A NORTHERN ARIZONA HOMEOWNER'S GUIDE TO IDENTIFYING AND MANAGING invasive plants
Common name(s): Filaree, redstem filaree, cranesbill, storksbill
Scientific name: Erodium cicutarium
Family: Geranium family (Geraniaceae)
Reasons for concern: This plant is very adaptable and can survive in a wide variety of soil and climate conditions. Its habit of growing flat and close to the ground prevents the germination of desirable native species important to wildlife and pollinators. Its seeds survive for a long time in the soil.
Botanical description: Low‐growing and spreading herbaceous plant with a strong, pungent smell.
Leaves: Feathery, fern-like and hairy. Very delicate. Each leaf is made of up 3 to 9 fern-like leaflets that are opposite each other on the stem.
Stem(s): Numerous stems. Leafy and hairy. Usually reddish. Stems form a rosette of dark green leaves that grow very close to ground.
Flowers: Plants have 2 to 12 small 5-petaled flowers that appear as early as February through July on 4 inch hairy stalks in clusters. Pink to purple in color.
Seeds: Fruits are long and pointed with 5 lobes, and a characteristic beak-like projection.
Roots: Shallow rooted. Thick and white central taproot with fibrous lateral roots.
Native to: Europe or Asia
Where it grows: Grows in full sun in gardens, lawns, roadsides, and fields. Wide elevation range, 1,000 to 7,500 feet.
Life cycle: Winter annual or biennial
Reproduction: By seed
Weedy characteristics: Each plant can produce between 2,000 and 10,000 seeds. When seed pods open, fine seeds are flung far from the mother plant, spreading into new territory. Each seed has a long tail that coils into a spiral when dry, and burrows its way into the soil. Seeds are carried by water and in animal fur or feathers to new locations. This plant flourishes in early spring when there is more precipitation than usual.
Look-alike native plants: Native Texas stork’s bill (Erodium texanum) can be distinguished by lobed leaves, as opposed to the dissected leaves of filaree, and larger flowers and petals.
Control strategies: Eradicate plants when they’re young and easier to pull, dig or hoe. Do not let them go to seed. Keep track of weedy patches, and check them regularly. Try heavy mulch. Plant desirable species to outcompete invasives.
Images: Click on an image to enlarge and see the image citation.
- A Northern Nevada Homeowner’s Guide to Identifying and Managing Redstem Filaree University of Nevada Cooperative Extension
- Redstem filaree Utah State University Extension Weed Guides, Geranium family
- Filarees University of California Agriculture and Natural Resources – IPM Weed Galler