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  Thelocactus hexaedrophorus CACTUS ART
NURSERY

Cultivation and Mail Sale
of Cacti and Succulents.

 


Thelocactus hexaedrophorus is a roundly flat and glaucous-grey cactus, It has the best tubercles of an any of the Thelocactus, and is a must for any collection.
 

Description: T. hexaedrophorus is a solitary and quite variable cactus with flattened stems. Many local forms are known, often formally described, that differ in stem, spine or flower morphology. Because of the large variability of the species in the whole distribution area, none of these are recognised today.
Stem:
Depressed or globose,
bluish , olive-green, or greyish-green eventually tinged in pink or purple, 3-7.5 cm tall , 8-15(-20) in diameter (eventually grows a little taller in cultivation)
Ribs: 8-13 indistinct, but generally evident in adult plants.
Tubercles: Fat, polygonal-rounded (hexagonal or pentagonal based), sometime compressed at the tip, 8-20 mm long, 13-26 mm large..
Areoles: 4-13 mm long, elongated into a short groove, without glands.
Spines: Usually strong and variable in length depending on the clone often difficult to distinguish as centrals and radials.
Central spines: Almost always absent or sometime one, 15-25 mm long, ochre, pinkish-grey, reddish, purplish, brow to whitish acicular to subulate.
Radial spines: 4-8, 5-60 mm long, erect to spreading, pure white, ochre, reddish to brown, straight or curved, acicular to subulate.
Flowers: Silvery-w
hite or rarely pinkish with more or less magenta midribs, up to 10 in diameter. Pericarpel covered with scales.
Fruit: Green magenta, 7-11 mm becoming dry at maturity.

The variety "lloydiifrom Zacatecas has a pink flower and eight robust radial spines, Due to the species variability but it seems not justified to recognise this subspecies, as it has already been done with the other varieties described.
 


 

 

Photo of conspecific taxa, varieties, forms and cultivars of plants belonging to the Thelocactus hexaedrophorus complex:

 

Cultivation: Easy to cultivate but very slow growing. Water regularly from Spring to Autumn, but do not overwater (root prone) needs good drainage and very porous potting mix, In Winter, keep dry. Frost Tolerance: Hardy to -7C.
Sun Exposure: Full sun to light shade

Reproduction: From seed, since the plant rarely produces plantlets.


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Family: Cactaceae (Cactus Family)

Conservation status: Listed in CITES appendix 2.

Scientific name:   Thelocactus hexaedrophorus (Lem.) Britton & Rose
In: Bull. Torrey Bot. Club 49: 251 (1922).

Basionym: Echinocactus hexaedrophorus Lemaire
In:Cact. Gen. Nov. Sp. 27 (1839).
Neotype: Iconographie descriptive des Cactees Plate 2 (1841).

Note: It is the type species of the genus, the second to be imported into Europe and described.

Origin:  Mexico (San Luis Potosi, Tamaulipas, Nuevo Leon and Zacatecas)

Habitat: This specie is found mainly in matorral xerofilo and pastizal on gentle limestone slopes and plains.

Conservation status: Listed in CITES appendix 2.

Etymology: The species name "hexaedrophorus" comes from the Greek "hexa" = six and "hedra" =plane, seat  and "phoros" = carrying, for the six angled tubercles.

Synonyms:  

  • Echinocactus droegeanus Hildm. ex Schumann
    Gesambt. Kakt. 438 (1898).
  • Echinocactus hexaedrophorus var. droegeanus R. Meyer
    Monatsschr. Kakt.-Kunde 27: 40 (1917).
  • Echinocactus fossulatus Scheidw.
    Allg. Gartenz. 9: 49 (1841).
  • Echinocactus hexaedrophorus var. fossulatus Salm-Dyck ex Labouret
    Monogr. Cact. 251 (1853).
  • Thelocactus fossulatus Br. & R.
    Cact. 4: 10 (1923).
  • Thelocactus hexaedrophorus var. fossulatus Backeb.
    Die Cactaceae V: 2800 (1961).
  • Echinocactus hexaedrophorus var. labouretianus Schumann
    Gesambt. Kakt. 438 (1898).
  • Thelocactus hexaedrophorus var. labouretianus A. Berger
    Kakteen 253 (1929)
  • Echinocactus hexaedrophorus var. major Quehl
    Monatsschr. Kakt.-Kunde 4: 29 (1894)
  • Thelocactus hexaedrophorus var. major A. Berger
    Kakteen 253 (1929)
  • Echinocactus hexaedrophorus [var.] roseus Lemaire ex Labouret
    Monogr. Cact. 251 (1853)
  • Echinocactus hexaedrophorus [var.] subcostatus Salm-Dyck
    Cact. Hort. Dyck. 1849, 34 (1850)
  • Thelocactus hexaedrophorus var. decipiens A. Berger
    Kakteen 253 (1929).
  • Thelocactus lloydii Britton & Rose
    Cact. 4: 11 (1923)
  • Thelocactus hexaedrophorus var. lloydii (Br. & R.) Kladiwa & Fittkau
    in Krainz, Die Kakteen Lfg. 61 (1975).
    Thelocactus hexaedrophorus
    ssp. lloydii (Br. & R.) N. P. Taylor
    CCI 5: 14 (1998).
  • Thelocactus hexaedrophorus ssp. francii Halda & Sladkovsky
    Acta Mus. Richnov. Sect. Nat. 7: 38 (2000).
  • Thelocactus hexaedrophorus ssp. jarmilae Halda & Chvastek
    Acta Mus. Richnov. Sect. Nat. 7: 38-39 (2000).
  • Thelocactus hexaedrophorus ssp. kvetae Chvastek & Halda
    Acta Mus. Richnov. Sect. Nat. 7: 39 (2000).
     
 
 


This is one of the Thelocacti  with the strongest and more colourful spines.


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

Photo gallery Thelocactus

Home | E-mail | Plant files | Mail Sale Catalogue | Links | Information | Search

All the information and photos in cactus art files are now available also in the new the Enciclopedia of Cacti. We hope you find this new site informative and useful.