Common purslane, a summer annual broadleaf plant grows rapidly in spring and summer and is an important agricultural weed. It is found throughout California to about 4600 feet (1400 m) and is common in agricultural areas and other disturbed places. Although it thrives under dry conditions, common purslane competes well under irrigated conditions. Plants prefer loose, nutrient-rich, sandy soil. Many regional biotypes are recognized as varieties or subspecies. Common purslane's distinctive succulent foliage is unlikely to be confused with other weed species. The purslane sawfly, Schizocerella pilicornis, and a leafminer weevil, Hypurus bertrandiperris, are two accidentally introduced biological control agents that have become widespread in California. Where the purselane sawfly has been established, the California Department of Food and Agriculture has rated it as providing excellent control of common purslane populations.