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Polaskia (named after American amateur Charles Polaski) is a genus of tree-like cacti reaching 4–5 m high, comprising 2 species. Both present primitive characteristics, but Polaskia chichipe is nearer to Myrtillocactus while Polaskia chende is nearer to Stenocereus. The genus is found in the Mexican states of Puebla and Oaxaca.[1][2]

Polaskia
Polaskia chichipe
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Tribe: Echinocereeae
Genus: Polaskia
Backeb.
Species
Synonyms
  • Chichipia Backeb. (nom. inval.)
  • Heliabravoa Backeb.

Description


The tree-like, highly branched species of the Polaskia genus reach heights of growth of between 4 and 5 meters and form dense crowns 3 to 4 meters above the ground. Its bright green shoots repeatedly fork and grow 1 to 2 meters long. The 7 to 12 ribs are sharply triangular in cross-section. On their edges, these wear 3 to 4 millimeters wide, shield-shaped areoles at close intervals. The central spine may be absent. The 3 to 8 radial spines are greyish to blackish.

The urn- to bell-shaped flowers are white to creamy white to yellowish green. They open day and night and are between 4 and 6 centimeters long.

The red, spherical fruits with a diameter of 2 to 4 centimeters are juicy and edible. The small seeds it contains are pear- to ovoid-shaped and dull black.


Synonymy


The following genera have been brought into synonymy with Polaskia:


Extant Species


Species as of 2021:[3]

ImageScientific nameCommon NameDistribution
Polaskia chendechende, chinoaOaxaca & Puebla Mexico
Polaskia chichipechichipe, chichibe, chichitunaOaxaca & Puebla Mexico

References


  1. Anderson, Edward F.; Eggli, Urs (2005). Das große Kakteen-Lexikon (in German). Stuttgart. ISBN 978-3-8001-4573-7. OCLC 181456857.
  2. "On-line Guide to the positive identification of Members of the Cactus Family". On-line Guide to the positive identification of Members of the Cactus Family. Retrieved 2022-10-25.
  3. Korotkova, Nadja; Aquino, David; Arias, Salvador; Eggli, Urs; Franck, Alan; Gómez-Hinostrosa, Carlos; Guerrero, Pablo C.; Hernández, Héctor M.; Kohlbecker, Andreas; Köhler, Matias; Luther, Katja; Majure, Lucas C.; Müller, Andreas; Metzing, Detlev; Nyffeler, Reto; Sánchez, Daniel; Schlumpberger, Boris; Berendsohn, Walter G. (2021-08-31). "Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family". Willdenowia. Botanic Garden and Botanical Museum Berlin, Freie Universitaet Berlin. 51 (2). doi:10.3372/wi.51.51208. ISSN 0511-9618.




На других языках


- [en] Polaskia

[es] Polaskia

Polaskia es un género de cactus casi árboles que alcanzan 4-5 metros de altura, con dos especies. Ambas presentan características primitivas, pero Polaskia chichipe está más cerca de Myrtillocactus mientras que Polaskia chende está más cerca de Stenocereus. El género se encontró en el estado mexicano de Puebla y Oaxaca. Fue nombrado en honor del botánico amateur estadounidense Charles Polaski. Es una especie endémica de la región Tehuacán-Cuicatlán. En la zona de Zapotitlán se pueden encontrar individuos de esta especie en los alrededores de Los Reyes Metzontla y de San Luis Atolotitlán.



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