Badmin: Created page with "{{Taxobox | name = Yungasocereus | image = Yungasocereus_inquisivensis.jpg | kingdom = Plantae | family = Cactaceae | subfamily = Cactoideae | tribe = Cereeae | subtribe = Trichocereinae | genus = '''Yungasocereus''' | authority = F.Ritter (1980) | notes = Taxonomy follows Joël Lodé (2015) with molecular insights from Arakaki (2008), Schlumpberger (2012), and Franck (2012). }} == Etymology == Named after the Yungas region (La Paz, Bolivia), where t..."

2026-04-22T07:48:40Z

Created page with "{{Taxobox | name = Yungasocereus | image = Yungasocereus_inquisivensis.jpg | kingdom = Plantae | family = Cactaceae | subfamily = Cactoideae | tribe = Cereeae | subtribe = Trichocereinae | genus = '''Yungasocereus''' | authority = F.Ritter (1980) | notes = Taxonomy follows Joël Lodé (2015) with molecular insights from Arakaki (2008), Schlumpberger (2012), and Franck (2012). }} == Etymology == Named after the Yungas region (La Paz, Bolivia), where t..."

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{{Taxobox
| name = Yungasocereus
| image = Yungasocereus_inquisivensis.jpg
| kingdom = [[Plantae]]
| family = [[Cactaceae]]
| subfamily = [[Cactoideae]]
| tribe = [[Cereeae]]
| subtribe = [[Trichocereinae]]
| genus = '''Yungasocereus'''
| authority = F.Ritter (1980)
| notes = Taxonomy follows Joël Lodé (2015) with molecular insights from Arakaki (2008), Schlumpberger (2012), and Franck (2012).
}}

== Etymology ==
Named after the Yungas region (La Paz, Bolivia), where the genus was first discovered.

== Description ==
'''Yungasocereus''' is a monotypic genus of columnar cacti with uncertain phylogenetic placement.

* '''Habit''': Shrubby to tree-like; branching; columnar; up to ~4–5 m tall.
* '''Stems''': Erect, with weakly defined ribs.
* '''Ribs''': 6–10, straight, slightly tuberculate; with transverse grooves above areoles.
* '''Areoles''': Close-set.
* '''Spines''': 4–12, short, aciculate; radials and centrals not clearly differentiated.
* '''Flowers''': Nocturnal, remaining open during the day; small, narrowly funnel-shaped, slightly zygomorphic, white.
* '''Floral tube''': With imbricated, woolly scales.
* '''Pollination''': By bats.
* '''Fruits''': Small, broadened at the base; with numerous fleshy scales; partially retaining floral remains.
* '''Seeds''': Elongated, shiny, dark brown to black.

== Habitat ==
Endemic to the Bolivian Yungas:

* humid tropical montane forests
* warm, moist environments

Altitude range: approximately 1450–2550 m.

== Distribution ==
Bolivia:

* La Paz

== Taxonomy ==
The genus has a highly uncertain and debated placement.

Key points:

* Originally described as ''Samaipaticereus inquisivensis'' (Cárdenas, 1957)
* Transferred to ''Yungasocereus'' by Ritter (1980)
* Temporarily included in ''Haageocereus'' (Hunt & Taylor)
* Later restored as a separate genus

Molecular insights:

* Arakaki (2008): places it within or near ''Weberbauerocereus''
* Schlumpberger (2012): includes it in a "Cleistocactus clade"
* Franck (2012): groups it with ''Cleistocactus'' and ''Samaipaticereus''

Interpretation:

* Possibly derived from reticulate evolution
* Phylogenetic position remains unresolved

The genus is therefore considered '''provisionally accepted'''.

== Species ==
Monotypic genus:

* [[Yungasocereus inquisivensis]]

== Notes ==
* One of the least clearly resolved genera in Trichocereinae.
* Shows affinities with multiple genera (''Weberbauerocereus'', ''Cleistocactus'', ''Samaipaticereus'').
* May represent a lineage shaped by hybridisation.
* Restricted to a very specific ecological zone (Yungas forests).

[[Category:Cactaceae]]
[[Category:Cactoideae]]
[[Category:Cereeae]]
[[Category:Trichocereinae]]
[[Category:Yungasocereus]]

Yungasocereus - Revision history