{{Short description|Genus of flowering plants}} {{Automatic taxobox | image = Adenostomafasciculatum.jpg | image_caption = ''Adenostoma fasciculatum'' in flower | display_parents = 2 | taxon = Adenostoma | authority = 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.<ref name=":2">{{Cite web|last=Jones|first=William|date=2012|title=Adenostoma|url=https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=10043|url-status=live|access-date=18 December 2021|website=Jepson eFlora|publisher=Jepson Flora Project (eds.)|archive-url=https://web.archive.org/web/20151218210526/http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=10043 |archive-date=2015-12-18 }}</ref> 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.<ref name="Jepson1993" /> The fruit is an achene. Chromosome number is 2n = 18.<ref name=":2"/>
=== Distribution and habitat === Both species are native to coastal California and Baja California. ''Adenostoma fasciculatum'' is also native to California in the Sierra Nevada.<ref name="Jepson1993">[http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?6677,6681,6683 Jepson Manual, University of California, 1993; ''Adenostoma'']</ref> They are found in plant communities and sub-ecoregions of the California chaparral and woodlands ecoregion.
== Taxonomy == <gallery widths="225" heights="225" perrow="2" caption="Species of ''Adenostoma''"> File:Chamise resprout Mag Road III.jpg|''Adenostoma fasciculatum'' <small>Hook. & Arn.</small> - Chamise File:Redshanks imported from iNaturalist photo 50466530 on 18 December 2021.jpg|''Adenostoma sparsifolium'' <small>Torr.</small> - Redshanks </gallery>Phylogenetic analysis places ''Adenostoma'' closest to ''Chamaebatiaria'' and ''Sorbaria'', and suggests tentative placement in the subfamily Spiraeoideae, tribe Sorbarieae.<ref name=":4">{{Cite web|last=Montalvo|first=A.M.|last2=Riordan|first2=E.C.|last3=Beyers|first3=Jan|date=2017|title=Plant profile for Adenostoma fasciculatum|url=https://www.fs.fed.us/psw/publications/beyers/psw_2018_beyers003_montalvo_adenostoma-fasciculatum.pdf|url-status=live|access-date=15 October 2021|website=Treesearch|publisher=United States Department of Agriculture|archive-url=https://web.archive.org/web/20200319074058/https://www.fs.fed.us/psw/publications/beyers/psw_2018_beyers003_montalvo_adenostoma-fasciculatum.pdf |archive-date=2020-03-19 }}</ref> The name ''Adenostoma'' comes from Greek, meaning "glandular mouth," referring to the hypanthium ring gland.<ref name=":2" />
==References== {{Reflist}}
==External links== {{Commons category|position=left}}
{{Taxonbar|from=Q4682292}} {{Authority control}}
Category:Adenostoma Category:Sorbarieae Category:Rosaceae genera Category:Flora of California Category:Flora of Baja California Category:Natural history of the California chaparral and woodlands Category:Flora without expected TNC conservation status Category:Taxa named by George Arnott Walker Arnott Category:Taxa named by William Jackson Hooker