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Redstem filaree is a prostrate broadleaf winter annual or biennial weed that ranges from 4 to 20 inches in height. A member of the geranium family, it has fern-like, or feathery, foliage in a rosette. The stems are reddish and there is a large, white taproot. (There is a "white stem filaree" that is very similar to the "red-stem.") Plants develop as a basal rosette. Rosette leaves occur on petioles and are hairy. Individual leaves are divided into 3 to 9 individual leaflets arranged opposite from one another. Leaflets are lanceolate in outline, deeply lobed and range from 1 1/4 to 8 inches long. Stems are often reddish in color, grow along the ground or may be ascending. Clusters of 2 to 8 flowers occur, with each individual flower occurring on a relatively long flower stalk. Individual flowers are approximately 1/2 inch wide and consist of 5 bright pink to purple petals.