Xerophyte

Central Spines

0-1 upturned.

Description

Discocactus placentiformisSN|1430]]SN|1430]] v. minor-horridulus is an undescribed name published in some in some seed catalogs and used to indicate a local form of the variable Discocactus placentiformisSN|1430]]SN|1430]] with smaller squat solitary stems, and flowers often showing a nice pink colour in outer and lower perianth segments, but others forms are similar and plants from other localities look more like it.

Note

Discocactus placentiformisSN|1430]]SN|1430]] is a widespread and variable species that has received an undue number of names. The differences usually concern the spination, the size and colour of the body, however the colouring, size and density of spines is greatly influenced by the conditions of culture, at lower light levels the spines are less numerous, delicate and stems is greener, while with strong solar radiation the spines are stronger with a darker tint. Minor differences can also be found in the colour of flowers sometime with a slight pink colouration.

Cephalium

with creamy white hairs and small dark-brown spine-like bristles along the the margin.

Flowers

About 5.5 cm long and 4.5 cm in diameter, naked, inner perianth segments white, outer perianth segments and sepal like scales on the tube often tinged with pink.

Radial Spines

5-7(-8), ivory to grey, progressively longer from top to bottom of the areole, of which 3-5 stouter up to 1 mm in diameter, one of them (the lowermost) somewhat flat bent downwards, two to four of them to pointing sidewards, the uppermost (if present) are usually shorter (ca. 5 mm), also directed to the sides and upward. All spines are bent to the plant and somewhat twisted.