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Gypsum [ Geology - Ecology ]
Adjective: Gypseous - Gypsiferous

Dictionary of botanic terminology - index of names

  The gypsum is a natural crystalline colourless to white mineral consisting of hydrated calcium sulphate, with the chemical formula of CaSO4 - 2H2O  

Gypsum is a common  rock that occurs naturally in sedimentary rocks formed under heat and pressure from sediments in ocean salt water or by evaporation. It is the most common natural sulphate mineral and forms beds and lenses interstratified with limestone, shale, and clay. Gypsum also occurs in volcanic fumarolic deposits and as an accessory mineral in metalliferous veins; the mineral often appears as outward-curving flowers which have the shape of a petal. The rock is softer than limestone.
It is a dry natural fertilizer or amendment that supplies two important micronutrients: calcium and sulphur, it is used to ameliorate soils with a high exchangeable sodium fraction.
Also used in potting-mix for ornamental plants that need substrates rich in calcium.

Gypseous =  Of, relating to, or containing gypsum
Gypsiferous = Containing gypsum

The particular plants adapted to live in such a gypsiferous habitat are called Gypsophiles or Gypsophilous plant.
A number of
 cactus and succulents are gypsophiles and need some gypsum  grit/sand  in the potting mix.

Gypsiferous  soil [ Geology - Ecology ]
(also: Gypseous soil)
  A soil rich in gypsum, containing at least a percent of gypsum.  

The range varies widely from 1% to 5% in the different country.





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