Critically Imperiled Plant Profile
(Not Listed or Proposed under the Endangered Species Act)

Malacothamnus davidsonii.
Flowers are easily recognized as belonging to the mallow family, with five pink petals and a central column of stamens. Photo © Gabi McLean.

Malacothamnus davidsonii.
This tall wild hollyhock species is known from the San Gabriel Mountains and San Fernando Valley of southern California, where it grows in sandy washes and in coastal sage scrub. Photo © Gabi McLean.

Malacothamnus davidsonii range map.
Malacothamnus davidsonii range map.

Malacothamnus davidsonii, Davidson’s bush mallow

Threats

  • Urbanization.
  • Military activities at some sites.
  • Trail building.
  • Brush clearing.
  • Roadside activities.
  • Weeds.
  • ORVs.
  • Possibly grazing.

Conservation Status

National Forest and Grassland Occurrence

More Information

  • PLANTS Profile - Malacothamnus davidsonii, Davidson’s bush mallow
  • Allan, G.J., Mistretta, O., Tommerup, M., Blassey, K.; Brown, W.J., Jr. 1995. A field guide to the rare plants of the Angeles National Forest. USDA Forest Service, Pacific Southwest Region, Angeles National Forest, in cooperation with Rancho Santa Ana Botanic Garden. 153p.

Malacothamnus davidsonii.

Leaves are palmately veined and lobed. Photo © Gabi McLean.

Malacothamnus davidsonii.

Branched hairs are also a mark of the mallow family. Photo © Gabi McLean.

Malacothamnus davidsonii.

Malacothamnus davidsonii. Photo © Gabi McLean.