Cactuspedia home | E-mail | Photo gallery | Dictionary | Search 

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

 

Coryphantha poselgeriana var. valida
(Syn: Coryphantha valida)

CACTUSPEDIA       

 


Coryphantha poselgeriana var. valida
This plant has a characteristic silver epidermis, robust stem, and beautiful flowers.
 

Description: Coriphantha poselgeriana  is a heavily spined, imposing species, and reminds one of an Echinocactus. The nomenclature of this variable taxon is quite confusing.
Stem: Globular to short cylindrical, solitary or slowly clumping, reaching up to 30 cm in height and 18 cm in width.  Dull bluish green, apex rounded and woolly.
Roots: Thin taproot.
Tubercles: Up to 2(-3) cm long and 5 cm wide, convex
, conical, 4-6 edged with a deep wooly groove, near the areole, rounded near the end.  Parastichy number 8-13. With yellow-orange glands over the whole length.  Axil woolly with glands.
Areoles: About 7 mm wide, round with short wool.
Radial spines:   5 to 12
, with 7-8 of them radiating sideways and downwards, straight or recurved, strong, subulate, the 3-4 lower ones are somewhat fattened, up to 30-40 mm long.  Whitish, later reddish or blackish,  with a darker tip and ultimately greysh.
Central spines:  1, straight, porrect, with light tip.  Similar in shape and colour to lower radials.
Flowers: 6-7 cm, varying from whitish-rose with a pink centre, to carmine red, and in San Luis Potosí even yellow-flowering forms occur.
Fruits: Green, juicy
, with persisting flower remnants. 25-50mm long, 7-18 in diameter.
Seeds: Reniform 2-2,5 mm long, 1,5 mm wide.

Remarks:
These clinal species have two forms, often referred to as distinct varieties or subspecies. The forms from North of the Sierra de Paila are more strongly spined (var. valida) than the ones to the South, which have more radials (var. saltillensis).  But the transition is continuous, and separation of a subspecies is questionable.

Cultivation:  This plant grows in the same habitat as Echinocactus horizonthalonius, with which it has some cultivation problems in common: slow-growing, seldom reaching the same size as in nature, sensitive against over-watering.  Water sparingly.  It needs good drainage.  Keep drier in winter. Full sun to partial shade. Full sun to partial shade. I n humid conditions, the exudation of nectar (if not completely removed by ants) can cause the formation of mould, which leads to ugly black-colouring of the epidermis. To prevent this, spray the plant with water to remove the nectar. And provide very good ventilation.
Propagation:
Seeds.
 

Family: Cactaceae (Cactus Family)

Scientific name: Coryphantha poselgeriana (Dietrich 1851) Britton & Rose
Published in: Cactaceae 4:28, 1923

Origin: It grows in the Mexican states of Coahuila, San Luis Potosí, Nuevo León, Zacatecas and Durango.

Habitat:  Widespread in alluvial plains with bare, sandy or gravely soils, often on gypsum.

Synonyms:

  • Echinocactus poselgerianus A.Dietrich (Basionym)
    Allg. Gartenz. 19:346, 1851
  • Coryphantha poselgeriana var valida (Purpus) Heinrich ex Backeberg 1961
  • Mammillaria valida J.A.Purpus (Nom inval.) 1911
  • Mammillaria valida Weber 1898
  • Mammillaria scheeri var. valida (Engelmann) Benson1969
    Coryphantha robustispina ssp. scherii
    (Lemaire)Taylor
  • Coryphantha valida (J.A.Purpus) Bremer 1977
  • Coryphantha kieferiana Hort. Ex Böedeker 1928
  • Coryphantha kieferiana Berger 1929
  • Echinocactus salinensis Poselger 1853
  • Mammillaria difficilis Quehl 1908
  • Mammillaria salm-dyckiana Scheer 1850 nom. rejic.
  • Echinocactus salm-dickianus Poselger 1853 nom. rejic.
  • Cactus salm-dyckianus Kuntze 1891 nom. rejic.
  • Coriphantha salm-dyckiana (Scheer) Britton & Rose 1923
  • Echinocactus saltiensis Pöselger 1853
  • Mammillaria saltillensis Böedeker 1928
  • Coryphantha poselgeriana var. saltillensis (Böedeker) Bremer 1977
     


Corypahantha poselgeriana valida VZD64 Laguna Viesca , Coahuila


 

 

Photo of conspecific taxa, varieties, forms and cultivars of plants belonging to the Coryphantha poselgeriana complex (This Taxon has lots of synonyms  and comprises many forms, but where each form is linked to others by populations of plants with intermediate characteristics):

 

 

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

Photo gallery coryphantha



 

Cactuspedia home | E-mail | Photo gallery | Dictionary | Search 

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