Home Myricaceae Morella Morella californica (California wax-myrtle, Pacific bayberry)

Native range: West Coast of N. America

Myrica californica - Leaning Pine Arboretum - DSC05800

Leaves:

  • alternate
  • simple
  • leaves extend from all sides of branch
  • lanceolate to oblong-lanceolate
  • nearly entire to coarsely but remotely serrate to crenate waxy leaves
  • densely gland-dotted
  • glands colorless to black on stems and both sides of leaves
  • pubescent on underside
  • aromatic when crushed

Myrica californica kz1

Flowers:

  • inflorescence – rounded clusters
  • red when young
  • hairy stigmas
  • females with short style enclosed by bract
  • flower clusters develop at ends of branches and in leaf axils
  • male, female, and bisexual flowers may be found on one spike

Myrica californica inflorescence (4)

Fruit:

  • drupe
  • nearly spherical
  • 4-8 mm long
  • purple-black
  • warty
  • may be waxy

Other characteristics:

  • evergreen shrub

Relevant info:

  • grows well in sandy soil
  • fruit pulp yields wax used to scent candles and perfumes
  • fruit of some specimen of this species have lower content of aromatic wax and may appear purple-black rather than white
  • formerly known as Myrica californica
    • originally assigned to Myrica by Chamisso, German botanist who published materials on the flora of Mexico with colleague Schlechtendal, in 1831
    • re-classified to Morella, another species in the same family, by American botanist R. L. Wilbur in 1994

Ecology & Adaptations:

  • native to the Pacific Coast and coastal valleys from southern British Columbia to central California
  • in Washington, southern half of the outer coast
  • at low eleveations (<500 m)
  • found in sandy, moist areas
  • coastal conifer forests, bogs, sand dunes, stream banks, wet meadows, marshes, low, moist hillsides
  • vegetative reproduction – re-sprouts from root crown following disturbance, resulting in multi-stemmed shrub growth-form
  • pollination by wind
  • seed dispersal by birds, which remove the wax coating as the fruits pass through their guts, which permits germination
  • drought tolerance & herbivore/insect protection – waxy substance in leaves that is produced by glands helps prevent water loss and protects against microorganism infection and insect herbivory
  • herbivory and microbial defense – aromatic compounds released when leaves are crushed serve as defenses against herbivory and microbial infection
  • tolerates low nutrient conditions (e.g., sandy substrates):
    • hosts nitrogen-fixing bacteria in root nodules
    • evergreen leaves maximize investment in photosynthetic structures
  • fire tolerance via re-sprouting from root crown
  • adapted to wetlands:
    • closely related species (Myrica gale) produces proportionately more below-ground than above-ground tissue when soil is saturated
    • major lateral roots become semi-vertical with increasing water-table depth
    • root nodules are more abundant in wetter soils
    • nodule roots extend above surface of saturated soils, which increases oxygen uptake