Description
Rebutia spegazziniana var. boliviensis is an undescribed name (n.n.) firstly published in Köhres seed catalog in 1974, and used to indicate one of the innumerable local form of the variable Rebutia spegazziniana with bright carmine-red flowers, but others forms are similar and plants from other localities look more like it. Rebutia spegazziniana var. boliviensis is variable and has also at times been referred to a form of Rebutia deminuta. Anyway (whatever the scientific name is) this easy to grow cactus is highly priced for its vibrant red blooms.
Remarks: Rebutia spegazziniana is a widespread and variable species that has received an undue number of names. The differences usually concern only the spination, 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 white, 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 more pink or orange tint.
Origin and Habitat
Rio Bermejo, Tarija, Bolivia (field numbers: WR 922 and VJ 76)
Cultivation and Propagation
Rebutia spegazziniana var. boliviensis is easy to grow and recommended for beginners. Prefer gritty, porous mix with a pH slightly on the acidic side. Full sun to light shade, Water regularly in summer but do not overwater (the root system is rot prone) and allow the pot to dry out between waterings. Keep dry in winter Hardy to -4°C it will take low temperatures when dry and do require a winter rest period. This species will occupy a small flower pot comfortably and remain a manageable sized house plant.
Pest and disease: This plants are subject to mealy-bug attack and to fungus and rot problems brought about by overwatering and high humidity.
Propagation: Seed or offsets.