Aylostera mamillosa description

Rebutia (Aylostera) mamillosa was originally described in Succulenta 51(4), pp. 69-70, by Walter Rausch in 1972.

Here is the text of the description of this species in the original Latin, but you should look up the original description for more details, including further details in Dutch and a black-and-white photograph. The English translation below is my own.

Rebutia (Aylostera ) mamillosa Rausch spec. nova


Parce proliferans, globosa, 20 mm diametiens, atroviridi-fusca, radice rapiformi brevi; costis 14-16, spiralibus, in gibberes singulos, verrucosos, 3-4 mm longos ac latos dissolutis; areolis ovalibus, 2 mm longis, fuscotomentosis; aculeis marginalibus 8-10, divaricatis, 3-4 paribus, 1 sursum, 1 deorsum directo, ad 4 mm longis, flavis fusco-acuminatis; aculeo centrali 0-1, 2 mm longo, fusco; aculeis omnibus setosis, fragilibus. Floribus lateralibus, ca 40 mm longis et diametientibus; ovario et receptaculo gracillimo, roseo, squamis fuscis, pilis et setis albis tecto; phyllis perigonii exterioribus angustis, acutatis, fusco-roseis medio-viridulo-striatis; phyllis perigonii interioribus angustis, rubris; fauce violaceo-rosea, filamentis violaceo-roseis, in superiore parte albis, stylo et stigmatibus (6-8) albis vel viridibus; stylo cum receptaculo dimidium longitudinis fioris connato. Fructu globoso, 4 mm diametiente, brunneo-rubro, albo-pubescente et fusco-setoso. Seminibus mitraeformibus, 1 mm longis et 0,8 mm latis, testa verrucosa, atro-nitida, tunica arillosa reliqua tecta, hilo basali, lato, micropyle valde eminente.

Patria: Bolivia, a Camargo in occidentem versus, 3300 m ait.

Typus Rausch 302 in Herbaria W.

English translation

Rebutia (Aylostera ) mamillosa Rausch spec. nova


Branching a little, spherical, 20mm in diameter, dark greenish brown, with a short tap root; 14 – 16 ribs, spiralling, composed of wart-like tubercles, 3 – 4mm long and the same wide; areoles oval, 2mm long, with brown wool; 8 – 10 marginal spines, spreading, 3 – 4 pairs and one pointing upwards and one pointing downwards, up to 4mm long, yellowish brown at the tip; one or no central spine, 2mm long, brown; all spines bristly, soft. Flowers arise from the sides, ca. 40mm long and the same in diameter; ovary and receptacle slender, pink with brown scales, with white hairs and bristles; outer petals narrow, pointed, brownish-pink with a greenish central stripe; inner petals pointed, red; throat violet-pink, stamens violet-pink with white upper part, style and stigmas (6 – 8) white to greenish; style fused to the tube by half its length. Fruit spherical, 4mm in diameter, brownish-red, with white wool and brown bristles. Seed mitre-shaped, 1mm long and 0.8mm wide, with a warty skin, dark and shiny, with remains of the aril attached, a wide navel with micropyle [aperture] very evident.

Habitat: west of Camargo, Bolivia, at 3300m alt.

Type: Rausch 302 deposited in the Herbarium of the Natural History Museum in Vienna, Austria. (Pilbeam, J., 1997, “Rebutia”, Cirio Publishing Services, Southampton, states that this is incorrect; that the specimen was deposited in the Herbarium of the Municipal Succulent Plants Collection of Zurich, Switzerland).