Ranch Resources

Support SPR

SPR Products

Natural Beef

Grass-Fed Beef

Check out our products and their benefits…

U-Pick Apples

U-Pick Apples

16 distinct varieties…


To provide Cal Poly students, faculty, staff and the public with a unique interdisciplinary environment in which to foster the Learn by Doing philosophy by providing educational experiences on a working ranch, supporting diversified agriculture and forest resources while maintaining the integrity of ranch operations.

  —Our Mission

Flora of Scotts Creek Watershed

Growth Tree1 Tree2 Leaves Leaf Shape

Acer negundo var. californicum - California Box Elder

Images: View Larger Images

Family Name: Aceraceae

Common Names: California Box Elder, Ashleaf maple, Boxelder maple, Manitoba Maple, Western Boxelder

Origin: Native to California

Habitat: Streamsides and bottomlands, below 6000 ft.

Life Form and Duration: Perennial Tree, 6-20 m

Comments on overall growth: Crowns are broad and irregular, branches close to the ground.

Bark and Stem Description: Young twigs are hairy green.

Foliage Type: Deciduous

Foliage Description: Leaves are opposite and pinnately compound. The compound leaves are generally trifoliate but may have up to 7 leaflets, leaflets are 5-11 cm long with the terminal leaflet being the largest. Leaflets have coarsely toothed margins, undersurfaces are paler with more hairs than upper surfaces.

Infloresence Description: Inflorescence generally appears before growth of new leaves. Pistillate pedicels are elongated droopy clusters of flowers. Plants are dioecious (pistillate and staminate flowers on separate plants).

Flower Description: Petals absent.

Flowering Season: April-May

Fruit Type: Pair of long winged achenes (double samara)

Fruit Description: Wings widely spreading, body finely hairy, red becoming straw-colored with maturity.

Other Comments: Found common along Scotts Creek and bordering portions of Swanton Road where it parallels the creek.