Editing Alnus jorullensis

{{Short description|Species of tree}}
{{Speciesbox
| image         = Alnus jorullensis Kunth (AM AK327106-4).jpg
| status        = LC
| status_system = IUCN3.1
| status_ref    = <ref name = iucn>Stritch, L. 2014. ''Alnus jorullensis''. The [[IUCN Red List of Threatened Species]] 2014: e.T194477A2340177. https://dx.doi.org/10.2305/IUCN.UK.2014-3.RLTS.T194477A2340177.en. Accessed 31 January 2023.</ref>
| genus         = Alnus
| parent        = Alnus subg. Alnus
| species       = jorullensis
| authority     = [[Carl Sigismund Kunth|Kunth]]
| synonyms      =
* ''Alnus acuminata'' var. ''jorullensis'' <small>(Kunth) Regel</small>
* ''Alnus firmifolia'' <small>Fernald</small>
}}

'''''Alnus jorullensis''''', commonly known as '''Mexican alder''', is an [[evergreen]] or semi-evergreen [[alder]], native to eastern and southern [[Mexico]], [[Guatemala]], and [[Honduras]].<ref name=wcsp>[http://apps.kew.org/wcsp/namedetail.do?name_id=6476 Kew World Checklist of Selected Plant Families]</ref><ref name=":0">{{Cite journal|url=https://www.biodiversitylibrary.org/page/4861151|title=The Systematics of the American Species of Alnus (Betulaceae)|last=Furlow|first=John|date=April 1979|journal=Rhodora|access-date=18 December 2015|volume=81|issue=826|page=151}}</ref> Although previously reported from the Andes,<ref>{{Cite book|title=Flora of Peru|last=Macbride|first=J.F.|publisher=Field Museum of Natural History|year=1937|pages=267–268|volume=13 (2/2)|chapter=Betulaceae|url=https://www.biodiversitylibrary.org/page/2392359}}</ref> further collections showed these to be the similar species ''[[Alnus acuminata|A. acuminata]]'', commonly found in South America.<ref name=":0" />

== Description ==
''Alnus jorullensis'' is a medium-sized [[tree]] growing to 20–25 m tall. The leaves are obovate to elliptic, 5–12&nbsp;cm long, somewhat leathery in texture with a serrated margin and glandular on the underside. The [[flower]]s are wind-pollinated [[catkin]]s, produced in early spring.<ref>Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras</ref>

== Range and habitat ==
''Alnus jorullensis'' grows in high-elevation forests in Mexico's [[Sierra Madre Occidental]], [[Sierra Madre Oriental]] and [[Sierra Madre del Sur]], and in the highlands of Honduras, from 2,800 to 3,800 meters elevation. It is the most common alder in Mexico's mountains, and grows at the highest elevations. Guatemalan populations identified as ''A. jorullensis'' may be ''A. acuminata'', and its presence in Guatemala is uncertain.<ref name = iucn/>

It occurs most commonly on moist soils, including stream and river banks, wetlands, and moist slopes, where it establishes dense stands. It is also found in open oak–pine and fir woodlands. It is an early successional species in areas disturbed by natural processes like landslides or fires, or by human activities like logging or forest clearance for pasture.<ref name = iucn/>

In southern Mexico it is found in high-elevation tropical montane forests with cool temperatures with abundant rainfall.<ref name = iucn/>

== Subspecies ==
Two subspecies are recognized:<ref name=wcsp/>

* ''Alnus jorullensis'' subsp. ''jorullensis'' – Mexico, Guatemala, Honduras
* ''Alnus jorullensis'' subsp. ''lutea'' <small>Furlow</small> – Mexico

== Cultivation ==
It is used for ornamental planting in warm temperate areas such as southern [[California]].

== References ==
{{Reflist}}
{{Taxonbar|from=Q3291973}}
{{Authority control}}

[[Category:Alnus|jorullensis]]
[[Category:Trees of Northern America]]
[[Category:Trees of Central America]]
[[Category:Flora of the Sierra Madre Occidental]]
[[Category:Flora of the Sierra Madre Oriental]]
[[Category:Flora of the Sierra Madre del Sur]]
[[Category:Flora of the Trans-Mexican Volcanic Belt]]
[[Category:Plants described in 1817]]