Aylostera tuberosa description


The original description of Rebutia (Aylostera) tuberosa was published in Taxon 12:1 (1963) pp. 28-29, the journal of the International Association for Plant Taxonomy, by Friedrich Ritter.

Here is the text of the description in Latin, with my own English translation below. You should look up the original description for more details.

Rebutia tuberosa (subg. Aylostera) Ritter, sp. nova

Corpus hemisphaericum, valde proliferans, viride, 2-4cm diam. Radice rapacea; costae in tubercula 2-4mm alta solutae; areolae, 1,5-3mm longae, 1-1,5mm latae, albae; spinae tenuiter aciculares, 2-5mm longa, luteo-brunneae vel brunneae, rectae, radiales 4-12, centrales 1 vel plures; flores 3,5cm longi, 2,5cm diam.; albo-lanatum, interdum setis albis nonnullis obsitum; tubus floralis infundibuliformis, 7mm longus, albo-lanatus, haud setosus; tepala 13-14mm longa, 4-5mm lata, cinnabarina; stamina biserata, 6-7mm longa, pallide viridia; stylus 18mm longus, 8mm tubo florali adnatus, stigmatibus 6, pallide viridibus; fructus et semina ignota.

Habitat: Below Challamarca, Prov. South-Cinti, Chuquisaca, Bolivia, at an altitude of 2600m. Collected as FR770.

English translation

Body hemispherical, very proliferating, green, 2–4cm in diameter. Tap rooted; ribs with tubercles 2 – 4mm high; areoles, 1.5 – 3mm long, 1 – 1.5mm wide, white; spines slender, needle-like, 2 – 5mm long, yellowish-brown to brown, straight, 4 – 12 radial spines, 1 or more central spine; flowers 3.5cm long, 2.5cm in diameter; with white wool, sometimes with some white bristles; funnel-shaped floral tube, 7mm long, with white wool, without bristles; petals 13-14mm long, 4-5mm wide, cinnabar-red; stamens in two series, 6-7mm long, pale green; style 18mm long, fused with the flower tube for 8mm, with 6 pale green stigmas; fruit and seeds not known.

Habitat: Below Challamarca, Prov. South-Cinti, Chuquisaca, Bolivia, at an altitude of 2600m. Collected as FR770.