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  Eriosyce bulbocalyx
(Syn: Pyrrhocactus bulbocalix)
CACTUSPEDIA       

 


Eriosyce bulbocalyx (syn. Pyrrocactus bulbocalyx)
L505 - Sierra Mazan, Catamarca, Argentina 2600-2900m

 

Description: Usually solitary globular cactus with apex covered with incurved, rust-coloured spines.
Stem: Globose to sub-globose or cylindrical as it becomes old, grey green, up to 12 cm in diameter.
Ribs: About 12-13.
Areoles: Oval, woolly and hairy when young (with yellowish felt), later naked.
Radial spines: 7 to 12 about 1,5-2 cm long, horn coloured, brownish becoming grey as the age.
Central spines: 1-4, subulate, nearly 2,5 cm long, rusty red later grey sometime with black tips,
all curved upwards, base swollen.
Flowers:
From the from centre of plant 2.5-5 cm in diameter, Urn-shaped, straw coloured, yellow or green yellow.
 

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Spines are curved upwards with a  swollen base .

Family: Cactaceae (Cactus Family)

Scientific Name: Eriosyce bulbocalyx  (Werderm.) Katt. 1994

Origin: Argentina

Conservation status: Listed in CITES appendix 2.

Etymology: The specific name  "Bulbocalyx" comes from Latin "bulbus" = bulb, tuber and "calix" = calix, cup, for the funnel shaped flowers with narrowed mouth and spreading perianth segment segments

Synonyms

  • Echinocactus bulbocalyx Werdermann (Basionym)
    In: Blüh. Kakt., p. 136, 1937
  • Pyrrhocactus bulbocalyx (Werdermann) Backeberg
    In: Die Cactaceae, 3 : 1565, 1959
  • Neoporteria bulbocalyx (Werderm.) Donald & G.D.Rowley 1966

Heterotypic synonyms:

  • Pyrrhocactus marayesensis (Backeberg) J.G. Lambert (Nom inval.), In: Cactus d'Argentine, ed. 2: 265: 1998.
  • Pyrrhocactus umadeave var. marayesensis  Backeberg  (Nom inval.),
    In: Descr. Cact. Nov. 3: 13., 1963
  • Neoporteria dubia (Backeb.) Donald & G.D.Rowley 1966
  • Pyrrhocactus dubius Backeberg, Backeb. & F. M. Knuth
    In: Kaktus-ABC, 263, 415., 1935
  • Pyrrhocactus megliolii W. Rausch
    In: Kakteen Sukk. 25 (10): 220, fig., 1975
  • Neoporteria megliolii (Rausch) Donald 1976

 

 

 


A mature specimen h 15 cm, diameter 11 cm
 

Cultivation:  It is a summer-growing species of relatively easy cultivation. It  is susceptible to over-watering if kept in a non ventilated place, sometimes it is  grafted to avoid root rot problems. Likes warmth (recommended minimum winter temperature 5° C) But plants kept perfectly dry can easily survive to winter night temperatures below 0° C. Sun Exposure: Suited for sunny-brightly exposure; can tolerate light shade. Good heat  tolerance.
Cultural Practices:
Suited for airy exposures.
Needs deep pot and gritty mineral substrate with a very good drainage. Water regularly in summer, keep dry in winter.

Propagation: Usually propagated from Seeds. (seldom produces offsets) or graft. Seeds can be sown in the spring or summer. The seedlings should not be disturbed until they are well rooted after which they can be planted separately in small pots.

 

 

Photo gallery: Alphabetical listing of Cactus and Succulent pictures published in this site.

Photo gallery ERIOSYCE

 



 

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This old page has been moved! Click the link next on the right to enter the new Enciclopedia of Cacti. We hope you find this new site informative and useful.

The Encyclopedia of Cacti