Aylostera rafaellii description


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The original description (of Rebutia rafaellii) was published in the Italian journal Cactus & Co., 1 (9) 2005, pp. 215 to 221.

Here is an excerpt of the main points, but you should look up the full description for more details.

Rebutia raffaellii Mosti & Papini sp. nov.

Typus – Holotypus: Argentina, Jujuy, near Tafna, WR 333c. Cult. S. Mosti, s. d. (FT)

A R. yuquinensi Rausch differt caulibus diametro maioribus (2.5-3.7 x 2.5-6 cm vice 2.5-3 x 2.4-4 cm), costis rectioribus numeroque minoribus (11 vice 12); aculeis marginalibus longioribus (0.7- 0.8 rarius ad 1 cm, vice 0.3-0.6 cm) numeroque minoribus (7, rarius 8, numquam 9 attingentibus) ab areolae centro (vice a marginibus) patentibus, basi magis incrassatis ac brunneis; segmentis perianthii lanceolato-rotundis nec spathulato-rotundis; squamis fructus longioribus ac viridioribus.

Description

Habitus: solitary or scarcely offsetting.

Stems: globose, brevicylindrical or cylindrical; dia. 2.5-3.7 cm; alt. 2.5-6 cm.

Epidermis: green or grey-green with slight brownish shading towards the base of the stems.

Ribs: 11 (-12), fairly straight.

Tubercles: rather pronounced and slightly flattened superiorly.

Areoles: round or slightly oval; dia. 2 mm ca., with scarce whitish or very light brown wool.

Radial spines: 7, sometimes 8; l. 0.7-0.8 (-1) cm, starting from centre of areole, parallel to the stems or inclined slightly outwards; horncoloured with brown base (slightly bulbous) and apex.

Central spines: 0 or rarely 1, pointing upwards and ca. 1 cm long.

Buds: globose.

Flowers: l. 3(-4) cm; w. 3.5-4.5 cm.

Flower tube: light brown with dark brown scales. Segments of perianth: 25-30; l. 1.2-2 cm; lanceolate-round, sometimes with short mucro; differing shades of magenta (magenta-pink) and a brown central stripe on the abaxial face of the more external segments.

Filaments of the stamens: magenta.

Anthers: yellow.

Style: green.

Stigma: light yellow (7 lobes).

Fruit: globose, dia. 0.5 cm, reddish-brown with evident green scales and hair.

Cells of seed testa: convex, usually isodiametric; frequently interwoven tubular ridges on the sides, apical zone with finer and more tightly packed ridges.