{{Short description|Genus of cacti}} {{Automatic taxobox | image = Haageocereus pacalaensis.jpg | image_caption = ''Haageocereus pseudomelanostele'' | display_parents = 2 | taxon = Haageocereus | authority = [[Curt Backeberg|Backeb.]]<ref name="Plants of the World Online"/> | subdivision_ranks = Species | subdivision = [[#Species|See text]]. | type_species = ''[[Haageocereus pseudomelanostele ]]'' | synonyms = {{Genus list |Floresia|Krainz & F.Ritter ex Backeb., not validly publ. |Haageocactus. }} | synonyms_ref = <ref name="Plants of the World Online"/> }}
'''''Haageocereus''''' is a [[genus]] of [[cactus|cacti]] endemic to the lower elevations of the extremely dry desert along the coast of Peru and northern Chile.
==Description== The species of the genus ''Haageocereus'' grow like a shrub to tree-like, with outstretched and creeping, lengthwise, ascending or upright shoots. The shoots usually consist of many ribs, with closely spaced [[areole]]s from which numerous thorns arise. Areoles from which flowers arise often have additional bristles.
The tubular to bell-shaped flowers are white to pink or red, open at night and remain open until the next day. The flower tube is strong and fleshy. The flower cup and the flower tube are covered with numerous scales and few to many hairs. The stamens are in a single circle.
The fleshy, spherical fruits are green to red and have a few scales and hairs. The rest of the flowers are perennial. The egg-shaped seeds are shiny black and irregularly pitted.<ref name="Anderson Eggli 2005 p. 331–336">{{cite book | last1=Anderson | first1=Edward F. | last2=Eggli | first2=Urs | title=Das grosse Kakteen-Lexikon | publisher=Ulmer | publication-place=Stuttgart (Hohenheim) | date=2005 | isbn=3-8001-4573-1 | language=de | pages= 331–336}}</ref>
== Species == {{As of|2025|October}}, the accepted species are:<ref name="Korotkova Aquino Arias Eggli p. ">{{cite journal | last1=Korotkova | first1=Nadja | last2=Aquino | first2=David | last3=Arias | first3=Salvador | last4=Eggli | first4=Urs | last5=Franck | first5=Alan | last6=Gómez-Hinostrosa | first6=Carlos | last7=Guerrero | first7=Pablo C. | last8=Hernández | first8=Héctor M. | last9=Kohlbecker | first9=Andreas | last10=Köhler | first10=Matias | last11=Luther | first11=Katja | last12=Majure | first12=Lucas C. | last13=Müller | first13=Andreas | last14=Metzing | first14=Detlev | last15=Nyffeler | first15=Reto | last16=Sánchez | first16=Daniel | last17=Schlumpberger | first17=Boris | last18=Berendsohn | first18=Walter G. | title=Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family | journal=Willdenowia | publisher=Botanic Garden and Botanical Museum Berlin, Freie Universitaet Berlin | volume=51 | issue=2 | date=2021-08-31 | issn=0511-9618 | doi=10.3372/wi.51.51208 | page=| s2cid=237402311 | doi-access=free }}</ref><ref name="Plants of the World Online">{{cite web | title=Haageocereus Backeb. - Plants of the World Online | website=Plants of the World Online | url=http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:298240-2 | access-date=2023-10-13}}</ref> {| class="wikitable" |- ! Image !! Scientific name !! Distribution |- |[[File:Haageocereus acranthus acranthus 0zz.jpg|120px]] || ''[[Haageocereus acranthus]]'' {{small|(Vaupel) Backeb.}} ||Peru |- |[[File:Haageocereus australis - University of California Botanical Garden - DSC08844.JPG|120px]] || ''[[Haageocereus decumbens]]'' {{small|(Vaupel) Backeb.}} ||Chile North, Peru |- |[[File:Haageocereus fascicularis.jpg|120px]] || ''[[Haageocereus fascicularis]]'' {{small| (Meyen) F.Ritter}} || S. Peru to Chile (Tarapacá) |- |[[File:Haageocereus platinospinus.jpg|120px]] || ''[[Haageocereus platinospinus]]'' {{small| (Werderm. & Backeb.) Backeb.}} || Peru |- |[[File:Haageocereus chosicensis.jpg|120px]] || ''[[Haageocereus pseudomelanostele]]'' {{small|(Werderm. & Backeb.) Backeb.}} ||Peru |- | || ''[[Haageocereus repens]]'' {{small|Rauh & Backeb.}} ||Peru |- |[[File:Haageocereus versicolor (Madeira).jpg|120px]] || ''[[Haageocereus versicolor]]'' {{small|(Werderm. & Backeb.) Backeb.}} ||Peru |}
== References == {{Reflist}} *''The Cactus Family'', By Edward F. Anderson, Wilhelm Barthlott, Roger Brown *http://cactiguide.com/cactus/?genus=Haageocereus
==External links== *{{Commons category-inline|2=''Haageocereus''}} *{{Wikispecies-inline|Haageocereus|''Haageocereus''}}
{{Taxonbar|from=Q134099}}
[[Category:Haageocereus| ]] [[Category:Cereeae genera]]