The original description of Rebutia (Aylostera) haagei was published in Kaktusář, 1: 88, in 1930 by Alberto Vojtěch Frič & Ernst Schelle. The original description of Lobivia (Aylostera) haagei var. (ssp.) elegantula was published in Lobivia 85 in 1987 by Walter Rausch, and the original description of Rebutia (Aylostera) mudanensis (haagei ssp. mudanensis) was published in Kakteen und andere Sukkulenten, 27: 169, in 1976 by Walter Rausch.

I have not been able to obtain a copy of the original Rebutia haagei description, however a summary of this, as Lobivia haagei, was reprinted in Lobivia 85 (1987) by Walter Rausch (in German), and the main points are given here, translated into English. For all the descriptions given, you should look up the originals for more details, drawings, photographs and notes. Note that Lobivia haagei described here includes a number of different forms which have since been given separate specific status.

Lobivia haagei (Frič & Schelle) Wessn.

Solitary, later somewhat branching, 2–3 cm high and 1–2 cm thick, dull grey, with a large tap root, ribs approx. 12, straight or lightly twisted, divided into small tubercles, radial spines in 5 pairs and one downwards, thin, close fitting, colourless, no central spines. flower 4 cm long and wide, with salmon-pink-orange and purple stripes. Fruit spherical, hairy, soft, shiny black, later drying up; cap-shaped, rough-matt with a broad, straight single navel.

Habitat Jujuy, Argentina.

Notes given in Lobivia 85 following the description

Rausch acknowledges that the only concrete features separating the wide range of A. haagei (as defined at the time) from the wide range of A. pygmaea are (a) the pastel-coloured flowers of A. haagei versus the more saturated colours (and spines) of A. pygmaea, and (b) the glaucous grey-green appearance with purplish overtones of A. haagei bodies. However population ranges are distinct, and within themselves uniform. With the “lumped” species removed to their own taxa (A. canacruzensis, A. crassa, A. eos, A. nazarenoensis, A. orurensis, A. pelzliana, A. violascens) it becomes easier to define.

Lobivia haagei (Frič & Schelle) Wessn., var. elegantula Rausch var. nov.

In allen Teilen kleinere, mehr sprossende Form aus Argentinien, Rio San Juan de Oro.

English translation

Lobivia haagei (Frič & Schelle) Wessn., var. elegantula Rausch var. nov.

In all parts smaller, more branching form from Argentina, Rio San Juan de Oro.

Rebutia (Digitorebutia) mudanensis RAUSCH spec.nov.
Walter Rausch

Simplex, brevi-cylindrica, 40 mm alta et 30 mm diametiens, clare-viridis, radice napiformi; costis 13, recte adscendentibus vel paululum tortis, in gibberes pianos, 4 mm longos et latos divisis; areolis ovalibus, 2 mm longis albo- ad fuscotomentosis; aculeis marginalibus 12, accumbentibus ad paulum radiantibus, ad 10 mm longis, vitreo-albis, dilute-fuscoacuminatis; aculeo centrali 0 – 1 , validiore.
Floribus lateralibus, 35 mm longis et diametientibus; ovario et receptaculo roseo, squamis perpaucis, fuscis, tenuibus et
pilis albis tecto; phyllis perigonii exterioribus spathulatis, reflexis, albido-roseis, medio-violaceo-roseo-striatis; phyllis
perigonii interioribus spathulatis, ad 8 mm latis, rotundis, reflexis, clare-aurantiacis; fauce et filamentis e toto receptaculi pariete orientibus, albido-roseis; stylo 27 mm longo, 15 mm eius cum receptaculo manubrii modo connato, flavovirente, stigmatibus 6, viridulis, 3 mm longis.
Fructu globoso, 6 mm diametiente, fusco-violaceo, squamis angustis, flavo-virentibus, pilis et setis albis tecto; exocarpio tenui deliquescente sarcocarpio albido. Seminibus Digitorebutiae typo.

Patria: Argentina, Salta, apud Santa Ana, 3.500-4.300 m alt.

Typus: Rausch 689 in Herbario Collectionis Plantarum Succulentarum Municipali Turicensi, Helvetia.

English translation

Rebutia (Digitorebutia) mudanensis RAUSCH spec.nov.
Walter Rausch

Simple, short-cylindrical, 40 mm tall and 30 mm across, bright green, tap rooted; ribs 13, straight or slightly spiraling, tubercles rounded, 4 mm in length and divided laterally; areoles oval, 2 mm long with white to yellowish felt; radial spines 12, lying flat and slightly spreading, to 10 mm long, glass-white, pale becoming dark at the tip; no central spines or 1 strong central spine.

Flowers from the side, 35 mm long and broad; ovary and tube pink, with only a few small, dark brown, slender scales, and white hairs; outer petals spatulate, reflexed, whitish-pink with a violet-pink middle stripe; inner petals spatulate, 8 mm wide, rounded, reflexed, light orange; throat and stamens whitish-pink, arising from the whole wall of the tube; style greenish-yellow, 27 mm long of which 15 mm growing beyond the flower tube, stigmas 6, greenish, 3 mm long.

Fruit spherical, 6 mm diameter, brown-violet, with yellow-green narrow scales, covered in white hair and bristles; thin-skinned, breaking up, flesh whitish. Seed type as Digitorebutia.

Habitat: Argentina, Salta, near Santa Ana, 3.500-4.300 m altitude.

Typus: Rausch 689 in the Herbarium of the Municipal Succulent Plants Collection Zurich, Switzerland.