Siemensia

{{Short description|Species of plants}}

{{Automatic taxobox

|image =

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|taxon = Siemensia

|authority = Urb.

|synonyms = Portlandia pendula {{small|C.Wright ex Griseb.}}

}}

Siemensia is a monotypic genus of flowering plants belonging to the family Rubiaceae.{{cite web |title=Siemensia Urb. {{!}} Plants of the World Online {{!}} Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:296660-2 |website=Plants of the World Online |access-date=19 May 2021 |language=en}} It only contains one known species, Siemensia pendula (C.Wright ex Griseb.) Urb.

Its native range is western Cuba.

The genus name of Siemensia is in honour of Werner von Siemens (1816–1892), a German electrical engineer, inventor and industrialist. Siemens's name has been adopted as the SI unit of electrical conductance, the siemens. He founded the electrical and telecommunications conglomerate Siemens.{{cite book | last=Burkhardt | first=Lotte | title=Verzeichnis eponymischer Pflanzennamen – Erweiterte Edition |trans-title=Index of Eponymic Plant Names – Extended Edition | publisher=Botanic Garden and Botanical Museum, Freie Universität Berlin | year=2018 | isbn=978-3-946292-26-5 | url=https://doi.org/10.3372/epolist2018 |format=pdf |language=German |location=Berlin | doi=10.3372/epolist2018 | s2cid=187926901 |access-date=1 January 2021}} The Latin specific epithet of pendula means hanging.{{cite book | last=Harrison |first=Lorraine | title=RHS Latin for Gardeners | year=2012 |publisher=Mitchell Beazley | location=United Kingdom | isbn=978-1845337315 }}

Both the genus and the species were first described and published in Symb. Antill. Vol.9 on page 143 in 1923.