General description: R. rauhiorum Barthlott is a flat-leafed species with thin leaves or stems that can be up to 2 feet long and 3/4-inch wide. Slightly serrated margins, prominant mid rib. White flowers, white fruit. From Ecuador.

Plant - Epiphytic (Epilithic in the German description!), hanging, bushy, to 1 m long, much branching from the tip (occasionally from the middle) mainly in a whorl.
Branches - 2 angled, (primary stem 3 to 4 angled), leaf-like and flat, succulent, branch strongly crenate, 1.9 - 2.2 cm wide and 5 - 10 cm long with yearly determinate growth.
Areoles - very small, without bristles and with barely visible tomentum; New shoots with a very small deciduous leaf.
Branch covering - pale green with vesicles 70 x 100 m with smooth surface area. Stomata not sunken.
Flowers - lateral on young branches, simple or sometimes two, whitish (sometimes the disc at the base of the style with red centre) radial, 7 - 11 mm Æ and 8 - 9 mm long.
Perianth-segments - 5 - 9, shiny white, long acuminate, the inner ones to 5 mm long and 2.5 mm wide( ?edges with fine serrations - see drawing)
Style - erect, 4 mm long with mostly 4 bent-backwards lobes. at the base of the style is a whitish or mostly carmine red disk.
Stamens - 25 - 35, 2 - 3.5 mm long; Anthers whitish, small.
Pericarp - Light green, naked, often with vestigial areole, not sunken into stem.
Fruit - a globose naked berry, ca. 7 mm long and 5 mm thick, dirty white, often reddish overlay.
Type locality - Epiphytic on old trees in Ceiba pentandra area of Rio Catamayo - Tales (South Ecuador) at 1300 m altitude.

DISTRIBUTION - This thick and fleshy form of dry habitats is known from at least Colombia and western Ecuador, between 1000 - 1700 m altitude

Synonym "roseana" from "Costa Rica," Colombia