{{Short description|Species of flowering plant}} {{Speciesbox |taxon=Scadoxus longifolius |authority=(De Wild. & T.Durand) Friis & Nordal<ref name=WCSP_287365/> |synonyms= {{Specieslist |Demeusea longifolia|De Wild. & T.Durand |Haemanthus longifolius|(De Wild. & T.Durand) Traub }} |synonyms_ref=<ref name=WCSP_287365/> }}

'''''Scadoxus longifolius''''' is a herbaceous plant from Zaire.<ref name=WCSP_287365/> It is only known from a single collection, and little information is available about it. It appears to be closely related to ''Scadoxus cinnabarinus'', and Inger Nordal and Thomas Duncan suggested in 1984 that it may not be a distinct species.<ref name=NordDunc84/>

==Taxonomy==

The species was first named in 1900 as ''Demeusea longifolia'' by Émile De Wildeman & Théophile Durand. In 1952, it was transferred to the genus ''Haemanthus'' by Hamilton Traub.<ref name=WCSP_287365/> ''Scadoxus'' had been separated from ''Haemanthus'' by Constantine Samuel Rafinesque in 1838,<ref name=Rafi38/> when he moved ''Haemanthus multiflorus'' to ''Scadoxus multiflorus''.<ref name=WCSP_287367/> This separation was ignored by most workers until 1976, when ''Scadoxus'' was again segregated from ''Haemanthus'' by Ib Friis and Inger Nordal. ''Haemanthus'' species are southern in distribution, form true bulbs and have 2''n'' = 16 chromosomes, whereas ''Scadoxus'' species, such as ''S.&nbsp;longifolius'', are found throughout tropical Africa, do not all form bulbs and have 2''n'' = 18 chromosomes.<ref name=MeerClay04/>

''Scadoxus longifolius'' appears to be closely related to ''Scadoxus cinnabarinus'' and may not be a distinct species.<ref name=NordDunc84/>

==References== {{Reflist|refs= <ref name=MeerClay04>{{Citation |last1=Meerow |first1=Alan W. |last2=Clayton |first2=Jason R. |year=2004 |title=Generic relationships among the baccate-fruited Amaryllidaceae (tribe Haemantheae) inferred from plastid and nuclear non-coding DNA sequences |journal=Plant Systematics and Evolution |volume=244 |issue=3–4 |pages=141–155 |doi=10.1007/s00606-003-0085-z |bibcode=2004PSyEv.244..141M |s2cid=10245220 |name-list-style=amp |url=https://naldc-legacy.nal.usda.gov/naldc/download.xhtml?id=2422&content=PDF |url-access=subscription }}{{dead link|date=June 2025|bot=medic}}{{cbignore|bot=medic}}</ref>

<ref name=NordDunc84>{{Citation |last1=Nordal |first1=I. |last2=Duncan |first2=T. |year=1984 |title=A cladistic analysis of ''Haemanthus'' and ''Scadoxus'' |journal=Nordic Journal of Botany |volume=4 |issue=2 |pages=145–153 |doi=10.1111/j.1756-1051.1984.tb01482.x}}</ref>

<ref name=Rafi38>{{Citation |last=Rafinesque-Smaltz |first=C.S. |year=1838 |title=Flora Telluriana |publication-place=Philadelphia |url=https://www.biodiversitylibrary.org/page/7430162 |accessdate=2014-03-25 |at=[https://www.biodiversitylibrary.org/page/7430513 part 4, p. 19]}}</ref>

<ref name=WCSP_287365>{{Citation |contribution=Scadoxus longifolius|title=World Checklist of Selected Plant Families |publisher=Royal Botanic Gardens, Kew |contribution-url=http://apps.kew.org/wcsp/namedetail.do?name_id=287365 |accessdate=2014-03-24}}</ref>

<ref name=WCSP_287367>{{Citation |contribution=Scadoxus multiflorus|title=World Checklist of Selected Plant Families |publisher=Royal Botanic Gardens, Kew |contribution-url=http://apps.kew.org/wcsp/synonomy.do?name_id=287367 |accessdate=2014-03-25 }}</ref> }}

==External links== * [https://www.europeana.eu/portal/record/11608/NBGB_NBGB_BELGIUM_BR0000008644114.html Image of herbarium specimen]

{{Taxonbar|from=Q15503721}}

Category:Amaryllidoideae Category:Plants described in 1900 Category:Taxa named by Théophile Alexis Durand