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Blueblossom

How to identify Blueblossom (Ceanothus thyrsiflorus)

Blueblossom, also known as Blue blossom ceanothus, Carmel ceanothus

Blueblossom is a robust evergreen shrub with a potential to reach towering dimensions of up to 20 feet (6 meters) in both height and width. Its structural form is characterized by a relatively short trunk and an expansive array of spreading branches. The foliage is lush, comprised of broad leaves. Remarkably, blueblossom exhibits a profusion of vivid blue flowers, a rarity in the horticultural world. These blooms provide significant appeal in various landscaping applications.

Lifespan

Lifespan: Perennial

Plant Type

Plant Type: Shrub

Leaf Type

Leaf Type: Evergreen

Quickly Identify Blueblossom

1

Robust evergreen shrub, up to 20 feet (6 meters) high and wide.

2

Profusion of rare vivid blue flowers in dense, spike-like clusters.

3

Small fruit with glandular-sticky surface, evolving in coloration with maturity.

4

Elliptic to ovate leaves, up to 1.5 inches (3.8 cm) long, with serrated margins.

5

Distinct 3 prominent veins on leaf underside, enhancing texture and identification.

BlueblossomBlueblossomBlueblossomBlueblossomBlueblossom

Detailed Traits of Blueblossom

Leaf Features

The leaves of blueblossom are elliptic to ovate, reaching up to 1.5 inches (3.8 cm) long and 0.5 inches (1.3 cm) wide. They exhibit finely serrated margins, sometimes with glandular teeth. The leaves are characterized by three prominent veins on the underside, starting from the leaf base. Their tip is obtuse to acute, contributing to the overall varied appearance. The rich green foliage adds texture and depth, enhancing the identifying features of this plant species.

Leaf Base

Circular

Leaf Arrangement

Alternate

Leaf Apex

Obtuse

Leaf Texture

Papyraceous ,
Coriaceous

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Flower Features

Blueblossom features striking spike-like clusters of blue flowers that emerge from mid-May to mid-June. Each cluster is composed of small blooms, with buds transitioning from a pinky-lavender hue to vivid blue upon opening. The dense clusters create a visually impressive display, typically measuring about 4 inches (10 cm) in length. The flower petals are tiny and numerous, contributing to the overall fluffy appearance. The flowers exude a subtle yet pleasant fragrance, enhancing their appeal.

Blueblossom Flower image
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Fruit Features

The fruit of blueblossom is a distinguishable small, measuring no more than a few centimeters in diameter. As it matures from August to October, it manifests a glandular-sticky surface that can be felt when touched. The fruit is subtly lobed, revealing slight indentations in its overall rounded shape. The coloration of the fruit typically progresses in tune with the maturing process, finishing with hues that blend into the plant's natural palette. Its petite size and the tactile stickiness of the fruit are significant for recognizing this species.

Fruit Type

Capsule

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Key Facts About Blueblossom

Attributes of Blueblossom
Lifespan
Perennial
Plant Type
Shrub
Plant Height
50 cm to 6 m
Spread
1.5 m to 1.8 m
Fruit Color
Brown
Purple
Copper
Lavender
Stem Color
Green
Leaf type
Evergreen
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Scientific Classification of Blueblossom

Family
Buckthorn
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Species
Blueblossom (Ceanothus thyrsiflorus)
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Distribution Map of Blueblossom

Blueblossom (Ceanothus thyrsiflorus) is a flowering shrub found in coastal wooded slopes and canyons on the west coast of North America from Oregon into Mexico. This plant is a popular garden species for its evergreen leaves and blue flowers, and it is widely grown in both its natural and hybridized forms.
Native
Cultivated
Invasive
Potentially invasive
Exotic
No species reported
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