{{Short description|Genus of flowering plants}} {{Speciesbox | name = Adenoa | image = AdenoaDSCN0071 2.jpg | image_caption = | status = VU | status_system = IUCN3.1 | display_parents = 2 | genus = Adenoa | parent_authority = Arbo. | species = cubensis | authority = Arbo. | range_map = Adenoa cubensis locator map.png | synonyms = ''Piriqueta cubensis'' }} '''''Adenoa cubensis''''' is the only member of ''Adenoa'', a monotypic genus of flowering plants.<ref name="POWO">{{cite web |title=Adenoa Arbo {{!}} Plants of the World Online {{!}} Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:39574-1 |website=Plants of the World Online |access-date=17 March 2021 |language=en}}</ref><ref>{{Cite web |title=Adenoa cubensis (Britton & Wilson) M. M. Arbo - Encyclopedia of Life |url=https://eol.org/pages/39925966 |access-date=2022-11-16 |website=eol.org}}</ref>
== Description ==
=== Morphology === ''A. cubensis'' is a 1-3 meter tall shrub with leaves described as oblanceolate or obovate, 4-8 cm long and 1-2.2 cm wide.<ref name=":1">{{Cite journal |last=Britton |first=Nathaniel Lord |date=1915 |title=Studies of West Indian plants VI |url=https://www.biodiversitylibrary.org/page/12246633 |journal=Bulletin of the Torrey Botanical Club |volume=42 |issue=7 |via=BHL}}</ref> Seeds are described as pyriform.<ref name=":1" /> ''A. cubensis'' lacks glandular hairs and has vegetative colleters.<ref name=":0">{{Cite journal |last1=Gonzalez |first1=Ana M. |last2=Salgado |first2=Cristina R. |last3=Fernández |first3=Aveliano |last4=Arbo |first4=María M. |date=2012 |title=Anatomy, pollen, and chromosomes of Adenoa (Turneraceae), a monotypic genus endemic to Cuba |url=http://link.springer.com/10.1007/s12228-011-9211-3 |journal=Brittonia |language=en |volume=64 |issue=2 |pages=208–225 |doi=10.1007/s12228-011-9211-3 |issn=0007-196X |s2cid=255557602|url-access=subscription }}</ref>
==== Flower morphology ==== ''A. cubensis'' has white homostylous flowers (3 cm) with protruding styles, free penduncles (1.5 cm), and short pedicels (0.5 cm).<ref name=":0" /><ref>{{Cite journal |last1=Shore |first1=Joel S. |last2=Arbo |first2=Maria M. |last3=Fernández |first3=Aveliano |date=2006 |title=Breeding system variation, genetics and evolution in the Turneraceae |journal=New Phytologist |language=en |volume=171 |issue=3 |pages=539–551 |doi=10.1111/j.1469-8137.2006.01807.x |issn=0028-646X |pmid=16866957 |doi-access=free |hdl-access=free |hdl=11336/41821}}</ref> The stamen of ''A. cubensis'' are free, similar to those found in ''Piriqueta''.<ref>{{Cite book |last=Arbo |first=María Mercedes |title=Turneraceae: Parte I Piriqueta |work=Flora Neotropica |publisher=New York Botanical Garden Press |year=1995 |volume=67 |language=es}}</ref> The anthers are obtuse. Overall, the flowers of ''A. cubensis'' are considered more complex than those found in ''Erblichia'' but simpler than those found in ''Turnera'' and ''Piriqueta.''<ref name=":0" /> In addition to the differences in flower complexity, there are differences between ''A. cubensis''<nowiki/>' pollen exine and the exine of other members of Turneroideae.<ref name=":0" />
=== Karyotype === ''A. cubensis'' is a diploid species (2n=14). Its chromosomes are similar in size to that of ''Turnera'' but larger than that of ''Piriqueta''.<ref name=":0" />
== Taxonomy == Originally, classified as ''Piriqueta cubensis'' by <small>Britton & P.Wilson in 1915<ref name=":1" /></small>'','' it would later be reclassified as ''Adenoa'' by MM Arbo in 1977''.''<ref>{{Cite journal |last=Arbo |first=M.M. |date=1977 |title=Adenoa, nuevo genero americano de Turneraceae. |journal=Hickenia |volume=1 |pages=87–91}}</ref><ref>{{Cite web |title=IRMNG - Adenoa M.M. Arbo, 1977 |url=https://www.irmng.org/aphia.php?p=taxdetails&id=1094432#sources |access-date=2022-12-21 |website=www.irmng.org}}</ref>
== Distribution == ''A. cubensis'' is native to southeast Cuba.<ref name="POWO" /> It can be found in La Mensura-Pilotos, Pico Cristal, and Alejandro de Humboldt national parks, and Loma Miraflores Managed Flora Reserve.<ref name=":2">{{Cite journal |last=Gonzalez-Oliva |first=Lisbet |last2=Gonzalez-Torres |first2=Luis |title=Cuban Redlisted Plant Species – 2023 |url=https://www.gbif.org/dataset/d51a552b-0d2c-4788-a5c9-824b552abbf1 |journal=IUCN/SSC Cuban Plant Specialist Group |doi=10.15468/9qtwmv}}</ref>
Herbarium specimens have been collected between Rio Yamaniguey and Camp Toa, Oriente Province, and Sierra de Nipe.<ref name=":1" />
== Conservation status == As of 2023, ''A. cubensis'' is classified as vulnerable.<ref name=":2" /> There are at least 10 localities, but the number of mature individuals and area occupied by the localities is decreasing. This decrease is likely the result of mining, fires, logging, forest management and urbanization.<ref name=":2" /> The species is found in several national parks and floristic reserves.<ref name=":2" />
==References== {{Reflist}}
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Category:Passifloraceae Category:Passifloraceae genera Category:Monotypic Malpighiales genera Category:Endemic flora of Cuba