Blue Blossom

Ceanothus thyrsiflorus var. thyrsiflorus

Buckthorn Family (Rhamnaceae)

Native

Key Identifying Characteristics

Large, evergreen shrub to small tree with dark green leaves and showy clusters of light blue to lavender flowers in late winter and early spring.

Height / Size

Varies. 2 to 30 feet tall, 2 to 40 feet wide

Leaves

Alternate leaves have three veins that join at the base. Leaves are shiny and dark green on upper leaf surface (adaxial), and lighter pale green on underside of leaf (abaxial) growing to two inches long. Leaf margins, though variable, tend to curve under (revolute).

Flower

Noted for its large fluffy clusters, up to 8 inches long, packed with pale to dark blue flowers dotted with yellow stamens.

Bloom Time: March to May.

Fruit / Seed

Blue blossom seeds are very small, shiny, and typically blackish-brown, and are found within small, three-lobed capsules.

Habitat

Chaparral, Mixed Evergreen Forest, Northern Coastal Scrub, Closed Cone Pine Forest

Location / Range

All trails. In California, found in the Coast Ranges from Del Norte County to Monterey County.

Lifespan

9 to 15 years

Fascinating / Fun Facts

Grows well in a variety of soils and is fairly drought resistant. The Pomo use the fresh or dried flowers as a soap for washing hands, face, and body; mixing the flowers with water to produce a fine lather when rubbed briskly on the skin.

Read More

Nature Talks:

The Spectacular Plant Diversity of San Pedro Valley Park – Morgan Stickrod

The Friends of San Pedro Valley Park welcomed Morgan Stickrod, a botanist and plant ecologist with over 10 years of experience doing research and field...

How much does Chaparral differ from place to place? – Speaker: Dr. Tom Parker

The Friends of San Pedro Valley Park are pleased to welcome back Dr. Tom Parker, Professor of Biology Emeritus from San Francisco State University...