Arbutoideae

The Arbutoideae are a subfamily in the flowering plant family Ericaceae. Phylogenetic analysis supported all genera of the subfamily as monophyletic, except Arbutus.[1] Moreover, it was suggested that the non-sister relationship between Mediterranean and North American species may be explained by a once widespread distribution in the Northern hemisphere before the Neogene.[1]

Arbutoideae
Arbutus menziesii
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Ericaceae
Subfamily: Arbutoideae
Nied.
Type genus
Arbutus
Genera

The genera Arbutus, Arctostaphylos, Comarostaphylis form a particular type of mycorrhizal symbiosis with the fungus Arbutoid mycorrhiza, which resembles ectomycorrhizas.[2][3]

Genera List
ImageGenusLiving Species
Arbutus L.
Arctostaphylos Adans.
Arctous (A.Gray) Nied.
  • Arctous alpina (L.) Nied.
  • Arctous microphyllus C.Y.Wu
  • Arctous ruber (Rehder & E.H.Wilson) Nakai
Comarostaphylis Zucc.
Ornithostaphylos Small
  • Ornithostaphylos oppositifolia, the Baja birdbush
Xylococcus Nutt.
  • Xylococcus bicolor, the mission manzanita


References
  1. Hileman LC, Vasey MC, Parker VT (2001). "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 2020-03-15).
  2. Osmundsen TW, Halling RE, den Bakker HC (2007). "Morphological and molecular evidence supporting an arbutoid mycorrhizal relationship in the Costa Rican páramo". Fungal Diversity. 17 (3): 217–222. doi:10.1007/s00572-006-0098-x. PMID 17216498.
  3. Smith SE, Read D (2008). Mycorrhizal Symbiosis (3rd ed.). Amsterdam; Boston: Academic Press. ISBN 978-0-12-370526-6.
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