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Arctostaphylos glandulosa subsp. crassifolia
Also called Costa Baja Manzanita
Arctostaphylos glandulosa subsp. crassifolia is a rare perennial shrub, a subspecies of manzanita within the heather family commonly known as the Del Mar manzanita. It is narrowly endemic to the sandstone coastal terraces of San Diego County and northwestern Baja California. It is a burl-forming evergreen shrub typically found growing in a rambling habit on poor soils and hardpan. From December to February, white to pink urn-shaped flowers decorate its foliage, giving way to small fruits. It is listed as endangered and is threatened by land development, invasive species and modifications to the natural fire regime.
The Del Mar manzanita is a sand and clay soil tolerant and drought-resistant plant. It is deer resistant and attracts hummingbirds and butterflies. The fruits are edible.
The Del Mar manzanita is fire-adapted, and once mature can regenerate from lignotubers, or burls, and from seeds. The burls at the base of the stem are covered in undeveloped branch buds, which will sprout after the upper stems are removed by fire or other means. The natural fires characteristic in the plant's community are crown fires that kill all of the above ground vegetation. The presence of the burls means that the plants are resilient to fire and can be very long lived. The burls develop about one year after the seedling germinates. The seeds are dependent on fire, and will only germinate with the presence of chemicals expelled by burning wood.
Santa Cruz manzanita · Mt. Diablo manzanita · Baker's manzanita · Cerro Bola manzanita · Hoary manzanita · Santa Catalina Island manzanita · Hairy manzanita · Santa Rosa Island manzanita · Brittleleaf Manzanita · La Cruz manzanita · Vine Hill manzanita · Little Sur manzanita
Text excerpted from the Wikipedia article Arctostaphylos glandulosa subsp. crassifolia by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
