Virginia Tech Weed Identification Guide

Redstem Filaree: Erodium cicutarium

Weed Description:  A winter annual with showy pink to purple flowers that ranges from 4 to 20 inches in height.   Redstem filaree is primarily a weed of turfgrass and landscapes that is found throughout the United States.

Seedling: Cotyledons and first true leaves are deeply lobed and occur on long petioles that are hairy.

Roots:  Small taproot and fibrous root system.

Leaves:  Plants develop as a basal rosette.  Rosette leaves occur on petioles and are hairy.  Individual leaves are divided into 3 to 9 individual leaflets that are arranged oppositely from one another.  Individual leaflets are lanceolate in outline and range from 1 1/4 to 8 inches long.  Leaflets are deeply lobed and do not have petioles (sessile).
Stems:  Growing along the ground or also may be ascending, with hairs, branched, often tinted red in color.

Flowers:  Clusters of 2 to 8 flowers occur with each individual flower occurring on a relatively long flower stalk (pedicel).  Individual flowers are approximately 1/2 inch wide and consist of 5 bright pink to purple petals.

Fruit:  Resembles a bird's beak and is approximately 1/2 to 3/4 inch long.

Identifying Characteristics:  The finely divided leaves, rosette growth habit, and opposite leaflets helps to distinguish this weed from most other winter annual weeds that are normally found in lawns and turfgrass.  Additionally, the distinctive fruit and showy purple flowers are good identifying characters of redstem filaree.