Plants of the San Marcos Foothills Preserve

Toxicodendron diversilobum (Poison Oak)

Uncommon, native, perennial shrub found in coastal sage-scrub plant community, but also on the edges of oak woodland. Flowers are yellow (aging red). Blooms in spring. Previous scientific name: Lotus scoparius.

Toxicodendron diversilobum (poison oak). NATIVE. Pictured in winter.

Toxicodendron diversilobum (poison oak). NATIVE. Pictured in autumn.

Toxicodendron diversilobum (poison oak). NATIVE. Pictured in autumn.

Toxicodendron diversilobum (poison oak). NATIVE. Pictured in winter (before rains).