Bright yellow flowers up to 1.5 in. Two-lipped corolla; lower lip hairy with red spots near throat. San Juan Loop Trail, Cleveland National Forest, Riverside Co., CA 7-11-10. © Joan Avise

Seep Monkey flower

Mimulus guttatus

Part of a species complex, taking variable forms, making it a model organism for studies of evolution and ecology.  There are both annual and perennial forms.  It is common along river banks, streams, and other wet places in foothills and the Santa Ana Mtns.  Plants can be erect or decumbent, the latter sometimes rooting at the nodes. Height ranges from 16-40 inches.  It is pollinated by bees. 

Phrymaceae

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Flowers on long stems in leaf axils. Caspers Wilderness Park, San Juan Capistrano, CA. 4-29-07. © Joan Avise

Short 5-cleft bell-shaped calyx, rounded leaves irregularly toothed. Caspers Wilderness Park, San Juan Capistrano, CA. © Joan Avise

Flowers occur in leaf axils in racemes of five or more. Caspers Wilderness Park, San Juan Capistrano, CA. © Joan Avise

Developing fruits turn brown as they age. San Juan Loop Trail, Cleveland National Forest, Riverside Co., CA 7-11-10. © Joan Avise

Three plants at creek edge San Juan Loop Trail, Cleveland National Forest, Riverside Co., CA 7-11-10. © Joan Avise

Developing fruits turn brown as they age. San Juan Loop Trail, Cleveland National Forest, Riverside Co., CA. 8-25-11. © Peter J. Bryant

With Needle Goldfields, Lasthenia gracilis, at Mesa de Burro, Santa Rosa Plateau 3-28-10. © Ron Vanderhoff.