Pelecyphora aselliformis (2024)


Pelecyphora aselliformis (1)

Pelecyphora aselliformis Photo by: Valentino Vallicelli
It is a rare and very slow growing cactus, it is usually found grafted and "own roots" specimens are highly valued.


Origin and Habitat: Mexico (San Luis Potosí - around the city of San Luis Potosí.)
Habitat: This species is found in grit, at over 1800 meters in altitude, and receives little water in summer and none in winter. Plants grow in the shade of bushes and don’t get direct sun at midday.

Synonyms:

  • Pelecyphora aselliformis Ehrenb.
    • Anhalonium aselliforme (Ehrenb.) F.A.C.Weber in Bois
    • Ariocarpus aselliformis (Ehrenb.) F.A.C.Weber in Bois
    • Mammillaria asellifera Monv. ex F.A.C.Weber in Bois
    • Mammillaria aselliformis (Ehrenb.) H.P.Kelsey & Dayton

See all synonyms of Pelecyphora aselliformis

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Accepted name in llifle Database:
Pelecyphora aselliformis Ehrenb.
Bot. Zeitung (Berlin) 1: 737. 1843.
Synonymy: 7

  • Pelecyphora aselliformis Ehrenb.
    • Anhalonium aselliforme (Ehrenb.) F.A.C.Weber in Bois
    • Ariocarpus aselliformis (Ehrenb.) F.A.C.Weber in Bois
    • Mammillaria asellifera Monv. ex F.A.C.Weber in Bois
    • Mammillaria aselliformis (Ehrenb.) H.P.Kelsey & Dayton
  • Pelecyphora aselliformis var. concolor Hook.f. in Curtis
  • Pelecyphora aselliformis f. cristata hort.

Accepted name in llifle Database:
Pelecyphora aselliformis f. monstruosa hort.

Cultivars (1):

  • Pelecyphora aselliformis cv. Ferraresso

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Common Names include:
ENGLISH: Woodlouse Cactus, Hatchet Cactus
SPANISH (Español): Peyotillo, Piote, Peyote meco, Peotillo, Peote


Description: Pelecyphora aselliformisSN|855]]SN|855]] (commonly known as the "Hatchet Cactus") is among the most famous of all cacti for is unique shaped stem.
Habit: It is a small very slow growing clustering cactus.
Stem: Spherical to shortly cylindrical, 5-10 cm tall, 2-5 cm in diameter. The stem in young plant is quite different, very thin, pencil-like or clavate.
Tubercles: Laterally flattened, elongated, arranged in spirals.
Areoles: Oval shaped areoles. Areoles in this species are clearly dimorphic, much as in the mammillarias, but the vestigial groove is reminiscent of Coryphantha and related genera.
Spines: 40 to 60 pectinated.
Flowers: Pink to violet flowers with lighter outside petals, 2-3,5 cm in diameter. The floral buds are acuminate and appear on the apex.
Fruit: Dry, papery.
Seeds: Brown, curved and reticulate.
Blooming season: It normally flowers from February till October, but only if the sunlight is strong enough.

Subspecies, varieties, forms and cultivars of plants belonging to the Pelecyphora aselliformis group

  • Pelecyphora aselliformis Ehrenb.: The spines are pectinated and look like the Sowbugs or woodlouse (Oniscus asellus) from which the species name. Distribution: around the city of San Luis Potosí, Mexico.
  • Pelecyphora aselliformis f. cristata hort.: Crested form.
  • Pelecyphora aselliformis f. monstruosa hort.
  • Pelecyphora aselliformis cv. Ferraresso: forms a nice and tangled cluster of fine crests. Greyish-green to brownish with tiny oval shaped areoles and minuscule pectinated spines.

Notes: This species is closely related to Encephalocarpus strobiliformisSN|1547]]SN|1547]]. All evidence (the external features such as floral, fruit, and seed morphology, but also the internal structure, including tubercle and areole development, the anatomy of surface layers of mature tubercles, the structure of crystals in the ground tissues, and features of tracheary elements etc.) shows that the two plants are congeneric.


Bibliography: Major references and further lectures
1) Edward Anderson “The Cactus family” Timber Press, Incorporated, 2001
2) James Cullen, Sabina G. Knees, H. Suzanne Cubey "The European Garden Flora Flowering Plants: A Manual for the Identification of Plants Cultivated in Europe, Both Out-of-Doors and Under Glass" Cambridge University Press, 11/Aug/2011
3) David R Hunt; Nigel P Taylor; Graham Charles; International Cactaceae Systematics Group. "The New Cactus Lexicon" dh books, 2006
4) N. L. Britton, J. N. Rose “The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family.” Volume 4, The Carnegie Institution of Washington, Washington 1923, page. 41
5) Curt Backeberg “Die Cactaceae: Handbuch der Kakteenkunde” Gustav Fischer Verlag, Stuttgart New York 1982–1985


Pelecyphora aselliformis (5)
Pelecyphora aselliformis Photo by: Valentino Vallicelli

Pelecyphora aselliformis (6)
Pelecyphora aselliformis Photo by: Raimondo Paladini


Pelecyphora aselliformis (7)
Pelecyphora aselliformis Photo by: Valentino Vallicelli

Pelecyphora aselliformis (8)
Pelecyphora aselliformis Photo by: Andrea B.


Pelecyphora aselliformis (9)
Pelecyphora aselliformis Photo by: Carolina González

Pelecyphora aselliformis (10)
The spines are pectinated and look like the Sowbugs or woodlouse (Oniscus asellus) from which the species name. Photo by: Cactus Art


Pelecyphora aselliformis (11)
Pelecyphora aselliformis Photo by: Cactus Art

Pelecyphora aselliformis (12)
Pelecyphora aselliformis Photo by: Cactus Art

Cultivation and Propagation: It’s a relatively easy species to cultivate, but very slow growing. Needs a very well drained soil. Requires strong sun to part sun to develop good spinal growth and waterings should be rather infrequent, to keep the plant compact and not become excessively elongated and unnatural in appearance. Keep dry in winter, or when night temperatures remain below 10° C (but some people give this plant a light monthly watering to prevent the drying and shedding of the lower tubercles.) it is hardy to -4°C for a short period. Assure a good ventilation.
Propagation: It can be reproduced both by seeds and cuttings, but it is often grafted because difficult and slow to grow on its own roots. Older specimens shoot tillers from under tubercles, so they can be grafted, which is a much easier way of propagation than sowing. Young seedlings are tiny and they need several years to reach adult size, and require very careful watering.

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by Valentino Vallicelli


by Valentino Vallicelli


by Valentino Vallicelli


by Cactus Art


by Valentino Vallicelli

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Pelecyphora aselliformis (2024)

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