Sclerocactus polyancistrus

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Sclerocactus polyancistrus
Sclerocactus polyancistrus in flower in Nevada.

Sclerocactus polyancistrus in flower in Nevada.

Systematics
Order : Clove-like (Caryophyllales)
Family : Cactus family (Cactaceae)
Subfamily : Cactoideae
Tribe : Cacteae
Genre : Sclerocactus
Type : Sclerocactus polyancistrus
Scientific name
Sclerocactus polyancistrus
( Engelm. & JMBigelow ) Britton & Rose
Flowers of Sclerocactus polyancistrus .

Sclerocactus polyancistrus is a species of the genus Sclerocactus in the cactus family(Cactaceae). English common names are "Hermit Cactus", "Many-Hooked Viznagita", "Many-Spined Devil's-Claw Cactus" and "Mojave Devil's-Claw Cactus".

description

The spherical to cylindrical growing Sclerocactus polyancistrus becomes 5 to 45 cm long and 5 to 15 cm wide. It has ten to twelve variable, 5 to 13 cm long central spines , six to eight of which are hooked. There are 10 to 16 radial spines. The large, funnel-shaped flowers are 5 to 10 cm long and 7.5 to 9 cm in diameter. The bracts are pink to purple in color.

Sclerocactus polyancistrus grows in some places together with the closely related Sclerocactus nyensis . Both representatives of the Sclerocactus section bloom at the same time, but no hybrids are known. The flowering period begins in the Mojave Desert in late March. The mountain shapes bloom from May to June. Populations in the Barstow area have been almost completely destroyed in recent years by insect infestation ( Yosemita graciella or Monellina gigas (R. May 1982)). The type species of the Sclerocactus section Sclerocactus polyancistrus is one of the giants of the Mojave Desert. Together with the almost 1000 years old Joshua tree ( Yucca brevifolia ) they form a magnificent natural spectacle. The higher forms of Sclerocactus polyancistrus are hardy to minus 20 ° C when dry .

distribution

Distribution area in Nevada.

Sclerocactus polyancistrus is common in the Mojave Desert and the Great Basin Desert in California and Nevada at altitudes between 500 and 2600 meters. It grows on low hills in the typical "Sagebrush Desert" in the open "Juniper pinyon woodlands" and is associated with Sclerocactus nyensis , Echinocactus polycephalus , Micropuntia species, Escobaria vivipara var. Desertii , Echinocereus engelmannii , Yucca brevifolia and various Opuntia - Species.

Systematics

The first description by the American botanists George Engelmann and John M. Bigelow under the name Echinocactus polyancistrus was published in 1857. The American botanists Nathaniel L. Britton and Joseph N. Rose put the species in the genus Sclerocactus under the species name Sclerocactus polyancistrus , which is valid today . Another synonym for the species is Pediocactus polyancistrus G.Arp (1972). The species Sclerocactus polyancistrus is placed within the genus Sclerocactus in the section Sclerocactus .

Danger

Sclerocactus polyancistrus is endangered. In the Red List of Threatened Species of the IUCN , the species is listed as " Least Concern (LC) ". H. listed as not endangered.

photos

Sclerocactus polyancistrus :

  • With ripe fruits.

  • In culture.

  • Albino form.

  • Albino form in culture.

literature

  • Fritz Hochstätter (Ed.): At the locations of Pediocactus and Sclerocactus . Self-published, 1989.
  • Fritz Hochstätter (Ed.): The Genus Sclerocactus . English with a German summary. Self-published, 2005, ISBN 3-00-016153-8 .

Individual evidence

  1. ^ Proc. Amer. Acad. 3: 272, 1857. (preprint, 1856).
  2. ^ Britton & Rose: Cactaceae: 3: 213, 1922.
  3. ^ Fritz Hochstätter: The Genus Sclerocactus . 2005, pp. 42-44, Photomaterial pp. 160-179, p. 309.
  4. ↑ Sclerocactus polyancistrus in the Red List of Threatened Species of the IUCN 2013.2. Listed by: Butterworth, C. & Porter, JM, 2010. Retrieved December 30, 2013.

Web links

Commons : Sclerocactus polyancistrus  - Collection of images, videos and audio files