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Adenostoma
	Adenostoma fasciculatum in flower
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Rosales
Family:	Rosaceae
Subfamily:	Amygdaloideae
Tribe:	Sorbarieae
Genus:	Adenostoma; Hook. & Arn.

Adenostoma is a genus of shrubs in the rose family (Rosaceae) containing only two species, chamise (Adenostoma fasciculatum) and redshanks (Adenostoma sparsifolium). Both are native to the Californias.

Description

Characteristics

The plants grow in a habit of shrubs to small trees, and the stem is more or less resinous.^[1] Both species in this genus feature stiff, linear leaves arranged alternately or in clusters along stems with shredding bark. Flowers form on a panicle, are cream to white and, as in all members of the rose family, have hypanthia.^[2] The fruit is an achene. Chromosome number is 2n = 18.^[1]

Distribution and habitat

Both species are native to coastal California and Baja California. Adenostoma fasciculatum is also native to California in the Sierra Nevada.^[2] They are found in plant communities and sub-ecoregions of the California chaparral and woodlands ecoregion.

Taxonomy

Species of Adenostoma
Adenostoma fasciculatum Hook. & Arn. - Chamise
Adenostoma sparsifolium Torr. - Redshanks

Phylogenetic analysis places Adenostoma closest to Chamaebatiaria and Sorbaria, and suggests tentative placement in the subfamily Spiraeoideae, tribe Sorbarieae.^[3] The name Adenostoma comes from Greek, meaning "glandular mouth," referring to the hypanthium ring gland.^[1]

References

^ ^a ^b ^c Jones, William (2012). "Adenostoma". Jepson eFlora. Jepson Flora Project (eds.). Archived from the original on 2015-12-18. Retrieved 18 December 2021.
^ ^a ^b Jepson Manual, University of California, 1993; Adenostoma
^ Montalvo, A.M.; Riordan, E.C.; Beyers, Jan (2017). "Plant profile for Adenostoma fasciculatum" (PDF). Treesearch. United States Department of Agriculture. Archived (PDF) from the original on 2020-03-19. Retrieved 15 October 2021.

External links

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[:2-1] Jones, William (2012). "Adenostoma". Jepson eFlora. Jepson Flora Project (eds.). Archived from the original on 2015-12-18. Retrieved 18 December 2021.

[Jepson1993-2] Jepson Manual, University of California, 1993; Adenostoma

[:4-3] Montalvo, A.M.; Riordan, E.C.; Beyers, Jan (2017). "Plant profile for Adenostoma fasciculatum" (PDF). Treesearch. United States Department of Agriculture. Archived (PDF) from the original on 2020-03-19. Retrieved 15 October 2021.

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