https://wiki.mjcactus.com/index.php?action=history&feed=atom&title=PraecereusPraecereus - Revision history2026-06-22T04:05:28ZRevision history for this page on the wikiMediaWiki 1.45.1https://wiki.mjcactus.com/index.php?title=Praecereus&diff=395&oldid=prevBadmin: Created page with "{{Taxobox | name = Praecereus | image = Praecereus_euchlorus.jpg | kingdom = Plantae | family = Cactaceae | subfamily = Cactoideae | tribe = Cereeae | genus = '''Praecereus''' | authority = Buxbaum (1968) | notes = Taxonomy follows Joël Lodé (2015) with additional insights from Arakaki (2008), Nyffeler & Eggli (2010), and Kiesling (2010). Placement remains uncertain (''incertae sedis''). }} == Etymology == The name means "before ''Cereus''", implying a..."2026-04-20T08:24:02Z<p>Created page with "{{Taxobox | name = Praecereus | image = Praecereus_euchlorus.jpg | kingdom = <a href="/index.php?title=Plantae&action=edit&redlink=1" class="new" title="Plantae (page does not exist)">Plantae</a> | family = <a href="/index.php?title=Cactaceae&action=edit&redlink=1" class="new" title="Cactaceae (page does not exist)">Cactaceae</a> | subfamily = <a href="/index.php?title=Cactoideae&action=edit&redlink=1" class="new" title="Cactoideae (page does not exist)">Cactoideae</a> | tribe = <a href="/index.php?title=Cereeae&action=edit&redlink=1" class="new" title="Cereeae (page does not exist)">Cereeae</a> | genus = '''Praecereus''' | authority = Buxbaum (1968) | notes = Taxonomy follows Joël Lodé (2015) with additional insights from Arakaki (2008), Nyffeler & Eggli (2010), and Kiesling (2010). Placement remains uncertain (''incertae sedis''). }} == Etymology == The name means "before ''Cereus''", implying a..."</p>
<p><b>New page</b></p><div>{{Taxobox<br />
| name = Praecereus<br />
| image = Praecereus_euchlorus.jpg<br />
| kingdom = [[Plantae]]<br />
| family = [[Cactaceae]]<br />
| subfamily = [[Cactoideae]]<br />
| tribe = [[Cereeae]]<br />
| genus = '''Praecereus'''<br />
| authority = Buxbaum (1968)<br />
| notes = Taxonomy follows Joël Lodé (2015) with additional insights from Arakaki (2008), Nyffeler & Eggli (2010), and Kiesling (2010). Placement remains uncertain (''incertae sedis'').<br />
}}<br />
<br />
== Etymology ==<br />
The name means "before ''Cereus''", implying an ancestral or earlier lineage (''prae'' = before).<br />
<br />
== Description ==<br />
'''Praecereus''' is a genus of shrubby cacti with slender, often sprawling stems.<br />
<br />
* '''Habit''': Slender, cylindrical stems; erect to prostrate; strongly branched from the base.<br />
* '''Stems''': Without mucilage.<br />
* '''Areoles''': Rounded, situated on small prominences.<br />
* '''Spines''': Acicular, variable.<br />
* '''Flowers''': Nocturnal, funnel-shaped, with a curved, naked, thick-walled floral tube; white to greenish-yellow, slightly fragrant.<br />
* '''Pollination''': Primarily by bats (e.g. ''Glossophaga longirostris'') and hawkmoths (Sphingidae).<br />
* '''Fruits''': Globose to ovoid, fleshy, red with white pulp; laterally dehiscent; floral remnants persistent.<br />
* '''Seeds''': Black, shiny, elongated; ruminate to tuberculate.<br />
* '''Dispersal''': Possibly by mammals such as tapirs (''Tapirus terrestris'').<br />
<br />
== Habitat ==<br />
Occurs in tropical environments:<br />
<br />
* dry forests and cerrado vegetation <br />
* among shrubs, trees and rocks <br />
* loamy soils, sometimes on slopes <br />
<br />
Altitude range: sea level to approximately 2000 m. <br />
<br />
Climate: warm year-round, with rainfall up to ~1000 mm annually.<br />
<br />
== Distribution ==<br />
South America and adjacent regions:<br />
<br />
* Argentina <br />
* Bolivia <br />
* Brazil <br />
* Colombia <br />
* Ecuador <br />
* Paraguay <br />
* Peru <br />
* Trinidad <br />
* Venezuela <br />
<br />
== Taxonomy ==<br />
The genus is taxonomically problematic and considered '''provisionally accepted'''.<br />
<br />
Key points:<br />
<br />
* Buxbaum (1968): separated ''Praecereus'' from ''Cereus'' and ''Monvillea'' based on floral traits <br />
* Hunt & Taylor (1986, 1990): alternated between merging and separating these genera <br />
* Arakaki (2008): placed ''Praecereus euchlorus'' within Trichocereeae based on molecular data <br />
* Nyffeler & Eggli (2010): highlighted non-monophyly of traditional tribes <br />
* Kiesling (2010): suggested synonymy issues with ''Monvillea'' taxa <br />
<br />
The genus may represent a lineage with hybrid origin or misinterpreted morphology. Its placement within Cereeae remains uncertain.<br />
<br />
== Species ==<br />
Currently one species with several subspecies:<br />
<br />
* [[Praecereus euchlorus]]<br />
** [[Praecereus euchlorus subsp. amazonicus]]<br />
** [[Praecereus euchlorus subsp. diffusus]]<br />
** [[Praecereus euchlorus subsp. jaenensis]]<br />
** [[Praecereus euchlorus subsp. smithianus]]<br />
<br />
== Notes ==<br />
* One of the most taxonomically uncertain genera in Cactaceae.<br />
* Morphological characters (especially floral tube structure) conflict with molecular data.<br />
* Some taxa historically placed in ''Monvillea'' are now included here.<br />
* Further phylogenetic studies are required to clarify its true position.<br />
<br />
[[Category:Cactaceae]]<br />
[[Category:Cactoideae]]<br />
[[Category:Cereeae]]<br />
[[Category:Praecereus]]</div>Badmin