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Ceanothus americanus is a shrub that lives up to fifteen years and growing between 18 and 42 in (0.5 and 1 m) high, having many thin branches.Its root system is thick with fibrous root hairs close to the surface, but with stout, burlish, woody roots that reach deep into the earth—root systems may grow very large in the wild, to compensate after repeated exposures to wildfires.
Ceanothus is a genus of about 50–60 species of nitrogen-fixing shrubs and small trees in the buckthorn family (). [3] [4] [2] [5] Common names for members of this genus are buckbrush, California lilac, soap bush, or just ceanothus.
The flower is spoon-shaped and clawed, that consists of 5 stamens. The plant bears a fruit that is 3-4.5 mm wide. The fruit is a three-lobed capsule about 3 ⁄ 16 inches in diameter that opens at maturity to release seeds. [5] The seeds are usually brown and 2-2.5 mm long, and come in variety of shapes ranging from subglobose to ovoid.
Ceanothus griseus is a species of flowering shrub known by the common ... The fruit is a sticky black capsule about 4 millimeters in length containing usually 3 seeds.
High densities of seeds occur in the upper soil of Ceanothus communities. Seeds remain viable up to 24 years or more. Seed dormancy is broken by the removal of the seed coat by fire scarification or physical disturbance. [5] [7] Seeds germinate best at about 1 inch soil depth in shady areas in the spring following fire scarification. [5] [7]
Buckbrush seeds. Ceanothus cuneatus is a spreading bush, rounded to sprawling, reaching up to 3 meters (9.8 ft) in height. The evergreen leaves are stiff and somewhat tough and may be slightly toothed along the edges.
Ceanothus verrucosus is a species of shrub in the family Rhamnaceae known by the common names wart-stem ceanothus, barranca brush, coast lilac and white coast ceanothus. It is endemic to northwestern Baja California and San Diego County , where it grows in coastal sage scrub and coastal succulent scrub habitats.
Ceanothus arboreus is a spreading bush growing up to 12–36 feet (3.7–11.0 m) in height. [7] It has large, glossy, dark green leaves which are leathery or felt-like on their undersides. [7] Its showy bright blue flowers grow in plentiful panicles, or bunches, of tiny five-lobed blossoms. [7]
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