Ceanothus arboreus. TREE CEANOTHUS. California
Ceanothus 'Dark Star'
Ceanothus gloriosus var. exaltatus "Emily Brown"
Ceanothus griseus horizontalis
Ceanothus 'Julia Phelps'
Ceanothus 'Ray Hartman'
Ceanothus thyrsiflorus
Ceanothus 'Yankee Point'
RHAMNACEAE (Buckthorn family)

Ceanothus cultivars and hybrids are widely planted as ground cover and shrubs but some can be trees. Look for a tree form, probably variety ‘Ray Hartman’, north of Cordura Hall at Campus Drive West. Another specimen is on Panama Street at Forsythe Hall.

Illus. right: Ceanothus arboreus from George B. Sudworth. Forest Trees of the Pacific Slope. USDA, 1907. Click for full image.

Illustrations (links open new windows): CalPhotos

Additions/Revisions:

Other campus Ceanothus species and cultivars:

California Garden (Roth and Lomita): Ceanothus thyrsiflorus

Harmony House addition: Ceanothus gloriosus var. exaltatus "Emily Brown," a small holly-like, opposite leaved groundcover was planted in May 2008. The thick leaves have a single midvein.

Serra Mall along Oval and the top of the quad ears: narrow-leaved 'Dark Star' to 5 ft high, and the low, spreading C.griseus horizontalis 'Yankee Point'.

Serra at Galvez Mall (about 30 yards from Serra St. on either side of paved walk): C. thyrsiflorus 'Skylark' and C. 'Dark Star'.

Waterwise Demonstration Garden off Raimundo Way: C. 'Yankee Point' and C. 'Ray Hartman'.

Several C. 'Joyce Coulter have been planted (observed 5/1/06) in the bare spots caused by informal paths through the C.griseus horizontalis at the top of the Oval.

Front of 655 Serra St.: C. 'Julia Phelps', a few plants growing with the more numerous 'Dark Star'. 'Julia Phelps' has longer and broader leaves. Only 'Dark Star' is planted in the planting strip adjacent to Serra St.

Cultural notes on the different cultivars.

Name derivation, genus | species

Related material: SHRF Plant Culture Data Sheets | Stanford Grounds Plant Information Sheet. List No.14, p.2 | treatment in Jepson Manual

Botanical name index | Common name index | Family
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