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Searching for the invader

Chuparosa, a native wildflower, sways in the wind as Chris McDonald continues to look for the invasive non-native Sahara mustard. "We're learning to compete with the mustard," said Fred Lee, a Borrego Springs resident and former Anza-Borrego Desert State Park ranger. "If we don't adjust, we'll dry up and blow away."Allen J. Schaben / Los Angeles Times