Bolsa Chica Wetlands, Huntington Beach, Orange Co., CA 7-12-09. © Joan Avise

Coulter's Horseweed

Laennecia coulteri

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Shipley Nature Center, Huntington Beach, Orange Co., CA. © Joan Avise

Bolsa Chica Wetlands, Huntington Beach, Orange Co., CA 7-12-09. © Joan Avise

Shipley Nature Center, Huntington Beach, Orange Co., CA. 6-16-07. © Joan Avise

UCI Arboretum, Irvine, Orange Co., CA 8-02-08. © Joan Avise

UCI Arboretum, Irvine, Orange Co., CA 8-02-08. © Joan Avise
 

San Mateo Crk. mouth to 2.25 mi. upstream and 1 mi. SW, 7-25-13. © Ron Vanderhoff

San Mateo Crk. mouth to 2.25 mi. upstream and 1 mi. SW, 7-25-13. © Ron Vanderhoff