Stem segments and the scope of descriptions
The regional key from Minas Gerais distinguishes three-angled segments with alternating ribs in Rhipsalis paradoxa subsp. septentrionalis. Segment boundaries produce a characteristic repeated stem pattern. These revision data concern the named subspecies, a rank that should be retained when comparing localities and characters. The species account covers a broader taxonomic unit, while findings from particular material remain tied to its identification [Tortorelli et al. 2025].
Epidermis and internal tissues
In the six-species anatomical comparison, material identified as Rhipsalis paradoxa had stomata situated in depressions. Their presence produced the characteristic surface relief. Beneath the epidermis was a hypodermis, an outer cortical layer, containing thick-walled cells. This arrangement distinguished the material from species with stomata level with the surface and a thin-walled hypodermis [Calvente et al. 2008].
The examined stem contained parenchyma with mucilage cells and a circular vascular cylinder. The study assessed the taxonomic usefulness of these features. It did not measure transpiration or tolerance of prolonged drying, so sunken stomata cannot be directly translated into watering requirements. The chapter on epiphytic cactus biology and cultivation provides comparative context while retaining distinctions among species [Calvente et al. 2008].
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Materials from the author's archive
The species also appears in Konrad Szychowski's private material archive [Schumann 1890].
Synonyms and names in the literature
Hylorhipsalis paradoxa · Lepismium paradoxum [2-WWW]
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