Origin and Habitat: Questa de Sama and adjacent areas, Tarija, Bolivia
Altitude range: 3100-3900
Habitat and ecology: Rebutia fuscaSN|5046]]SN|5046]] grows on rock outcrops in grassy slopes.

• Rebutia fusca F.Ritter
• Aylostera fusca (F.Ritter) Mosti & Papini

• Rebutia spegazziniana Backeb.
• Aylostera spegazziniana Backeb. in Backeb. & F.M.Knuth
• Echinorebutia spegazziniana Backeb.
• Rebutia froehlichiana Rausch
• Aylostera froehlichiana (Rausch) Mosti & Papini
• Rebutia fusca F.Ritter
• Aylostera fusca (F.Ritter) Mosti & Papini
• Rebutia mamillosa Rausch
• Aylostera mamillosa (Rausch) Mosti & Papini
• Rebutia mamillosa var. australis F.Ritter
• Rebutia mamillosa var. orientalis F.Ritter
• Rebutia patericalyx F.Ritter
• Aylostera patericalyx (F.Ritter) Mosti & Papini
• Rebutia rubiginosa F.Ritter
• Aylostera rubiginosa (F.Ritter) Backeb.
• Rebutia spegazziniana var. atroviridis (Backeb.) Šída
• Rebutia spegazziniana var. boliviensis n.n., Rausch
• Rebutia boliviensis hort.
• Rebutia sumayana Rausch
• Aylostera sumayana (Rausch) Mosti & Papini
• Rebutia tarijensis Rausch
• Aylostera tarijensis (Rausch) Mosti & Papini
• Rebutia tarvitaensis F.Ritter
• Aylostera tarvitaensis (F.Ritter) Mosti & Papini
• Rebutia tuberosa F.Ritter
• Aylostera tuberosa (F.Ritter) Backeb.
• Rebutia vulpina F.Ritter
• Aylostera vulpina (F.Ritter) Mosti & Papini
• Rebutia fiebrigii var. vulpina hort.
• Rebutia vulpes F.Ritter
• Rebutia waltheriana Backeb.
• Aylostera waltheriana (Backeb.) Y.Itô
• Rebutia zecheri Rausch
• Aylostera zecheri (Rausch) Mosti & Papini
• Lobivia atrovirens var. zecheri (Rausch) Rausch

Description: Rebutia fuscaSN|5039]]SN|5046]] is a very distinctive species with an overall brown aspect, and with very short spines lying close to the stem that barely reach 2-3 mm long and give the impression that the plant could be grasped with impunity. It is the “Bolivian form” of Rebutia spegazzinianaSN|5046]]SN|5033]], but it has a very different habit from that species, growing tallish stems and solitary or clustering randomly. This slow growing cactus is highly priced for its vibrant orange red blooms.
Stem: Solitary, slowly and sparsely clustering in cultivation, 2-4 cm wide, and up to 8 cm tall or more.
Ribs: 13-17 scarcely discernible.
Areoles: With brown wool.
Radial spines: 8-14, pectinate, 1.5-3 mm long, lying flat to to the body, red, sometimes yellow, with red at the base.
Central spines: 1 or 2, thicker, red to nearly black, 2-3 mm long.
Flowers: Orange-red to scarlet, 2-3 cm long and wide. The stigma lobes are very pale and the anthers are cream coloured.
Spines: Rebutia fuscaSN|5033]]SN|5046]] is one of the shortest spined species in the genus.
Note: It is sometimes seen misnamed Rebutia vulpinaSN|5046]]SN|5039]], an altogether more bristly and more globular species.

Bibliography: Major references and further lectures
1) John Pilbeam “Rebutia” Cirio Pub. Services, 01 May 1997
2) “British Cactus & Succulent Journal” Cactus & Succulent Society, 2001

Cultivation and Propagation: It 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.