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Culture plant of Discocactus placentiformis HU105
Photo and description Gerard Uil

Discocactus placentiformis HU105

  • Description

LEHMANN (BUINING & BREDEROO) in Novae Academ.LeopldXVI, photo 1, page 318, 1939 
DISCOCACTUS page 74-77

  • Short plant description HU 105 in culture

Diameter of the culture plant  is ca. 15 cm. Plant height without cephalium 6 cm. The colour of the epidermis is green. Number of ribs is 15. Number of areoles per rib is 6 on plants with cephalium. The shape of the areoles is oval.  The number of radial spines is 5. In some plants one central spine appears. The length of the spines is 1 to 1.8 cm. The shape of the spines is slightly recurved backwards to the plant and the colour is brown/black. The colour of the cephalium is cream/white. The colour of the fruit is white.The position of the stigma is half-way up the secundairy stamens.

 

  • Remarks

This one of the most widely distibuted species. It has many habitats with their fieldnumbers, and consequently small differences in appearance.

  • Literature

KUAS 1979 page 281 
Discocactus page 73

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Habitat photo of  Discocactus placentiformis 
field number HU105
Photo: Albert Buining

  • Habitat

    Directly north of Diamantina in Minas Gerais, Brasil, also further west near Vila Sopa and Barrao de Quacuy etc. between rocks in rocky soil, growing with grasses and often with Bromeliaceae and under low growing shrubs at an altitude of 500 to 1000 m.

DIAMANTINA in MINAS GERAIS, Brazil 
Guia Rodoviario do Brasil, E-3

 

 
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Culture plant of  Discocactus placentiformis HU105a
Photo and description Günter Königs

  • Discocactus placentiformis HU105a

Diameter of the culture plant is ca. 15 cm. 
Plant height without cephalium 8 cm. 
The colour of the epidermis is green. 
Number of ribs is 12. 
Number of areoles per rib is 6 to 8 on plants with cephalium. 
The shape of the areoles is round.
The number of radial spines is 7 to 8. 
The length of the spines is 0,5 to 2 cm. 
The shape of the spines is slightly recurved backwards to the plant and the colour is pale gray. 
The colour of the cephalium is white. 
The position of the stigma is at the primary stamens.

 

  • Habitat


Goveia in Minas Gerais, Brazil

 

 

  • Discocactus placentiformis 81-096

Diameter of the culture plant is ca. 11 cm. 
Plant height without cephalium 7 cm. 
The colour of the epidermis is dark green. 
Number of ribs 13. 
Number of areoles per rib is 5 on plants with cephalium. 
The shape of the areoles is round. 
The number of radial spines is 6. 
The length of the spines upwards is 0,5 to 1 cm;  the spines side- and downwards are between 1.5 to 2.5 cm. 
The shape of the spines is slightly recurved backwards to the plant and the colour is pale gray with a dark tip. Young spines are black. 
The colour of the cephalium is gray/white.The colour of the fruit is cream. 
The position of the stigma is at the primary stamens.

 

  • Habitat


In the area of Medanha in Minas Gerais, Brazil, in rocky soil under low growing shrubs.

 

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Culture plant of  Discocactus placentiformis forma
 Photo and description Piet van der Laken
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Culture plant of Discocactus placentiformis forma 
Photo and description Piet van der Laken

  • Discocactus placentiformis 86015

Diameter of the culture plant  is ca. 12 cm. 
Plant height without cephalium 8 cm. 
The colour of the epidermis is shiny green. 
The number of ribs is 12. 
Number of areoles per rib is 8 on plant with cephalium. 
The shape of the areoles is round. 
The number of radial spines is 6 to 9. 
The length of the spines is 0,5 to 2 cm. 
The shape of the spines is recurved backwards to the plant and the colour is dark gray to black. 
The colour of the cephalium is gray/brown.
The colour of the fruit is white with a pink tip. The position of the stigma is at the top of the secundary stamens.

  • Habitat

In the area of the airfield of  Diamantina in Minas Gerais. Among low growing shrubs and grasses.

 

  • Discocactus placentiformis HU357

Diameter of the culture plant is ca. 15 cm. 
Plant height without cephalium 9 cm. 
The colour of the epidermis is shiny green. 
The number of ribs is 14. 
Number of areoles per rib is 7 on plants with cephalium. 
The shape of the areoles is oval. The number of radial spines is 5. 
The length of the 2 spines upwards  is 0.5 to 1 cm., the spines side- and downwards are 2 to 3 cm.
The shape of the spines is slightly bent to the plant and the colour is gray with a black tip. 
The colour of the cephalium is cream. 
The colour of the fruit is white. 
The position of the stigma ia half-way up at the secundary stamens.

  • Remarks

This variety of D. placentiformis remains small.

Sometimes this variety is offered as ssp. minor horridulum, but this is no valid description. 

  • Habitat

Barao de Quacuy in Minas Gerais, Brazil

 

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Culture plant of Discocactus placentiformis forma
  Photo and description Piet van der Laken
Originally in the collection of  Gerard Uil te Bemmel, Holland
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Culture plant of  HU543
Photo and description Günther Königs 

 

  • Discocactus sp. HU 543

Diameter of the culture plant  is ca. 7 cm. 
Plant height without cephalium 4 cm. 
The colour of the epidermis is pale green. 
Number of ribs 14.
Number of areoles per rib is 6 on plants without cephalium. 
The shape of the areoles is round. The number of radial spines is 5 to 7. 
The length of the spines  is 0,5 to 1,5 cm. 
The shape of the spines is slightly bent to the plant and the colour is pale gray.

  • Habitat

Biribiri in Minas Gerais, Brazil

  • Remarks

Plant is probably the same as BR293.