{{short description|Genus of plants}} {{Speciesbox | image = Plagiolirion_horsmannii.JPG | image_caption = | display_parents = 3 | genus = Plagiolirion | parent_authority = Baker<ref name=POWO_1588-1/> | species = horsmannii | authority = Baker<ref name=POWO_201154-2/> | synonyms_ref = <ref name=POWO_201154-2>{{Cite POWO|title=''Plagiolirion horsmannii'' Baker|id=201154-2|access-date=2023-06-27|mode=cs1}}</ref> | synonyms = * ''Eucharis horsmannii'' <small>(Baker) Traub</small> * ''Urceolina horsmannii'' <small>(Baker) Traub</small> |range_map = Colombia in the world (W3).svg |range_map_caption = ''Plagiolirion'' is endemic to Colombia<ref name=POWO_201154-2 /> }}
'''''Plagiolirion''''' is a monotypic genus in the family Amaryllidaceae endemic to Colombia.<ref name=POWO_1588-1>{{Cite POWO|title=''Plagiolirion'' Baker|id=1588-1|access-date=2023-06-27|mode=cs1}}</ref> It has only one known species, '''''Plagiolirion horsmannii''''',<ref name=POWO_1588-1/> which is rare in the wild and was thought to be extinct until it was rediscovered in the Río Cauca Valley in 1989.<ref name = "Meerow & Silverstone-Sopkin, 1995">[https://www.jstor.org/discover/10.2307/2807573?sid=21106363498523&uid=4&uid=2 Alan W. Meerow and Philip Silverstone-Sopkin. 1995. The rediscovery of ''Plagiolirion horsmannii'' Baker (Amaryllidaceae) Brittonia 47(4): 426-431]</ref>
==Description== thumb|right|Herbarium specimen of ''Plagiolirion horsmanii'' ===Vegetative characteristics=== ''Plagiolirion horsmannii'' is a bulbous,<ref name = "Baker, 1883" /><ref name = "Gardeners' Chronicle, 1883">[https://www.google.de/books/edition/The_Gardeners_Chronicle/fu49AQAAMAAJ?hl=de&gbpv=1&dq=Plagiolirion&pg=PA105&printsec=frontcover The Gardeners' Chronicle: A Weekly Illustrated Journal of Horticulture and Allied Subjects.] p. 105. (1883). Vereinigtes Königreich: Gardeners Chronicle.</ref> perennial herb with subglobose<ref name = "Meerow & Silverstone-Sopkin, 1995" /> or ovoid,<ref name = "Baker, 1883" /><ref name = "Weathers, 1890" /> tunicate, 5–6 cm long, and 5–5.5 cm wide bulbs<ref name = "Meerow & Silverstone-Sopkin, 1995" /> with fleshy roots.<ref name = "Baker, 1883" /> The bulbs have offsets at the base.<ref name = "Meerow & Silverstone-Sopkin, 1995" /><ref name = "Weathers, 2009" /> ===Generative characteristics=== The scapose, umbellate inflorescences with a terete, solid,<ref name = "Meerow & Silverstone-Sopkin, 1995" /> erect,<ref name = "The Garden, 1884" /> glaucous green,<ref name = "Weathers, 1890" /> 49–66 cm long, and 0.5 cm wide scape,<ref name = "Meerow & Silverstone-Sopkin, 1995" /> bears 10–41<ref name = "Meerow & Silverstone-Sopkin, 1995" /> white,<ref name = "Gardeners' Chronicle, 1883" /><ref name = "Wiener Garten-Zeitung, 1884">[https://www.google.de/books/edition/Wiener_illustrirte_Garten_Zeitung/Qo6J4cLZKiYC?hl=de&gbpv=1&dq=Plagiolirion&pg=PA94&printsec=frontcover Wiener illustrirte Garten-Zeitung: Organ d. K. K. Gartenbau-Gesellschaft in Wien.] p. 94. (1884). Österreich: Frick.</ref> zygomorphic,<ref name = "Silverstone-Sopkin, 2011" /> inodorous, protrandrous, pedicellate,<ref name = "Baker, 1883" /> 2.5–3 cm long,<ref name = "Meerow & Silverstone-Sopkin, 1995" /> and 3–4 cm wide flowers.<ref name = "Wiener Garten-Zeitung, 1884" /> The thin pedicels are 1.5–2 cm long.<ref name = "Meerow & Silverstone-Sopkin, 1995" /> ===Cytology=== The diploid chromosome number of ''Plagiolirion horsmannii'' is 2n = 46.<ref name = "Meerow & Silverstone-Sopkin, 1995" /><ref name = "Silverstone-Sopkin, 2011">Silverstone-Sopkin, P. A. (2011). [https://books.google.de/books?id=MDmnEAAAQBAJ&lpg=PA26&hl=de&pg=PA24#v=onepage&q&f=false Los muertos vivientes: La historia natural de cuatro lirios amazónicos del suroccidente de Colombia (Eucharis y Plagiolirion, Amaryllidaceae).] pp. 24–25. Universidad del Valle.</ref>
==Taxonomy== The genus and species were first described by John Gilbert Baker in 1883.<ref name = "Baker, 1883">Baker, J. G. (1883). [https://www.biodiversitylibrary.org/page/26130391 ''Plagiolirion horsmannii''.] Gard. Chron, 2(38), 1888.</ref> The genus is placed in the tribe Eucharideae.<ref name = "PBS">''Plagiolirion''. (n.d.). Pacific Bulb Society. Retrieved March 4, 2025, from https://www.pacificbulbsociety.org/pbswiki/index.php/Plagiolirion</ref>
===Etymology=== The generic name ''Plagiolirion'', from ''plagios'' meaning 'oblique' and ''leirion'' meaning 'lily',<ref name = "Weathers, 2009">Weathers, J. (2009). [https://www.google.de/books/edition/The_Bulb_Book/xrH9G4QjvUIC?hl=de&gbpv=1&dq=Plagiolirion&pg=PA398&printsec=frontcover The Bulb Book.] p. 398. USA: Applewood Books.</ref> is derived from the floral morphology.<ref name = "Weathers, 1890" /> The specific epithet ''horsmannii'' honours Fred Horsman,<ref name = "The Garden, 1884">[https://www.google.de/books/edition/The_Garden/pklNAAAAYAAJ?hl=de&gbpv=1&dq=Plagiolirion&pg=PA42&printsec=frontcover The Garden: An Illustrated Weekly Journal of Gardening in All Its Branches.] p. 42. (1884). Vereinigtes Königreich: (n.p.).</ref> who imported the species to Colchester, United Kingdom.<ref name = "Wiener Garten-Zeitung, 1884" /><ref name = "Weathers, 1890">Weathers, J. (1890). [https://www.google.de/books/edition/Gardeners_Chronicle/r8wcuM3OsNsC?hl=de&gbpv=1&dq=Plagiolirion&pg=PA262&printsec=frontcover ''Plagiolirion horsmannii''.] Gardeners’ Chronicle, p. 262.</ref><ref name = "Weathers, 2009" />
==Ecology== ===Habitat=== It occurs in the Colombian Andes.<ref name = "Weathers, 2009" />
==References== {{reflist}}
{{Taxonbar|from1=Q9060363|from2=Q15523623|from3=Q110989695|from4=Q110986156}}
Category:Monotypic Amaryllidaceae genera Category:Endemic flora of Colombia Category:Taxa named by John Gilbert Baker Category:Amaryllidoideae Category:Plants described in 1883