Plants of Garland Ranch Regional Park | Garland Park home
A project of Mindbird Maps & BooksAcer macrophyllum · Acer negundo ssp. californicum · Achillea millefolium · Amsinckia sp. · Anthemis cotula · Aralia californica · Artemisia californica · Artemisia douglasiana · Asclepias eriocarpa · Baccharis douglasii · Baccharis pilularis · Calystegia sp. · Cardamine californica · Cardionema ramosissimum · Centaurea melitensis · Cirsium occidentale var. venustum · Conium maculatum · Cornus sp. · Crassula connata · Cynoglossum grande · Dimorphotheca sp. · Dudleya sp. · Ericameria arborescens · Ericameria ericoides · Eriophyllum confertiflorum · Foeniculum vulgare · Hazardia squarrosa · Heterotheca grandiflora · Heterotheca villosa · Hirschfeldia incana · Lessingia filaginifolia · Lessingia glandulifera · Madia sp. · Marah fabaceus · Osmorhiza chilensis · Plagiobothrys sp. · Rorippa nasturtium-aquaticum · Sambucus mexicana · Sanicula arctopoides · Sanicula bipinnatifida · Sanicula crassicaulis · Sedum spathulifolium · Senecio douglasii · Solidago sp. · Toxicodendron diversilobum · Wyethia helenioides
Toxicodendron diversilobum
Pacific Poison-oak
Foliage detail, showing leaves with three leaflets.
Along east end of Buckeye Nature Trail.
February 3, 1978
Detail from photo below: Part of vine with fruit.
Poison-oak vine climbing Populus trichocarpa on the east side of Cottonwood Flat.
November 3, 1978.
Habit on sunny bank, with turning foliage.
Along Valley Vista Trail.
Leaf loss in many Coast Range plants, including poison-oak, is a response to drought rather than cold. It is common, then, to see these shrubs changing color in the middle of summer, during the annual summer droughts.
August 14, 1977. 1:10pm.
All photos copyright Ó Lee Dittmann, except where otherwise noted.