R. baccifera subsp. horrida (Baker) Barthlott in Bradleya 5 (1987)
© K. Friedman
Desc from Backeberg 1977 of R. horrida
Distribution - Madagascar, epilithic and epiphytic, to 1500 m altitude.
Note from Bradleya 13: Chromosome numbers: 2n = 44, 88. A neotenic race including forms with aberrant mesotonic branching habit and bristly stem, pericarpel and fruit.
Note from Suepplie 3/2001: Cylindrical with ribs, bristles many per areole, maximum 3mm long, whitish-grey to red/brown, flowers to 4mm diam., lithophyte