Xylococcus bicolor

Xylococcus bicolor
Xylococcus bicolor in bloom
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Ericaceae
Subfamily: Arbutoideae
Genus: Xylococcus
Nutt.
Species:
X. bicolor
Binomial name
Xylococcus bicolor
Nutt.
Synonyms[1]
  • Arctostaphylos bicolor (Nutt.) A.Gray
  • Arctostaphylos clevelandii A.Gray
  • Arctostaphylos veatchii Kellogg
  • Comarostaphylis bicolor (Nutt.) Klotzsch

Xylococcus is a monotypic genus of flowering plants in the heather family which contains the single species Xylococcus bicolor, commonly known as the mission manzanita.[2] It is a burl-forming, evergreen shrub with leathery leaves and smooth dark reddish bark. From December to February, white to pink urn-shaped flowers adorn the foliage, often attracting hummingbird pollinators. It is native to southern California and the Baja California Peninsula, south to the Sierra de la Giganta. There is growing concern over the future of this plant, referred to as the "queen of the elfin forest, " as it may possibly lose up to 88% of its habitat[3] and its wild seedlings are failing to survive more than a full year.[4]

Known to and utilized by the indigenous peoples for centuries, this species was first described to Western science by Thomas Nuttall, who had found it on his journey to California. Nuttall named it Xylococcus, which is derived from the Greek word for "wood berry".[5] Later botanists lumped this species into the true manzanitas (Arctostaphylos), but it has distinct features, such as the flowers and fruit, that support its generic placement.[6] In light of its struggle in the wild, this plant is available from specialty nurseries focusing on California native plants, making it a distinctive and hardy shrub in the garden.

Natural distribution of Xylococcus bicolor in California.
  1. ^ "Xylococcus bicolor". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 24 January 2022.
  2. ^ Xylococcus bicolor, Calflora.org - a database of California native plants, retrieved 2009-01-21
  3. ^ Riordan, Erin C.; Rundel, Philip W. (September 2013). "The Future of California Sage Scrub in an Era of Increasing Urbanization and Global Climate Change" (PDF). Fremontia. 41 (3): 2–7.
  4. ^ Gordon, L., R. W. Halsey, J. E. Keeley, J. P. Rebman, D. Wiens and A. Johanson. (2015) Mission manzanita, queen of the elfin forest: is the species in decline? Fremontia 43(2), 23-28.
  5. ^ Nuttall, Thomas (1843). "Description of New Species and Genera of Plants". Transactions of the American Philosophical Society. 8: 258–259 – via Biodiversity Heritage Library.
  6. ^ Hileman, Lena; Vasey, Michael; Parker, V. (2001-01-01). "Phylogeny and Biogeography of the Arbutoideae (Ericaceae): Implications for the Madrean-Tethyan Hypothesis". Systematic Botany. 26 (1): 131–143. doi:10.1043/0363-6445-26.1.131 (inactive 1 November 2024). JSTOR 2666660.{{cite journal}}: CS1 maint: DOI inactive as of November 2024 (link)