Key to the taxa of Kalanchoe subg. Kitchingia 1a. Plants small, epiphytic; leaves basally cuneate; corolla colour variable (red through orange to pinkish orange to yellow or yellowish green), generally more intensely coloured than in Kalanchoe peltata; stamens generally included...........2 [Kalanchoe gracilipes] 1b. Plants robust, terrestrial; leaves basally peltate; corolla colour variable (red through pink to yellowish pink or yellowish green or whitish), generally less intensely coloured than in Kalanchoe gracilipes; stamens generally exserted...........3 [Kalanchoe peltata] 2a. Leaf blade 10–30 mm long; margins subentire to deeply crenate, typically 7- to many-toothed; stem up to 2.5 mm in diameter........................................................................................................................................................ Kalanchoe gracilipes var. gracilipes 2b. Leaf blade 5–6 mm long; margins deeply crenate to lobed, typically 3-toothed; stem up to 1.5 mm in diameter.............................................................................................................................................................................. Kalanchoe gracilipes var. microphylla 3a. Stems robust, often ± 4-angled; petiole distinctly widened basally, comparatively short; blade often weakly peltate, strongly crenate, lack violet-black blotching pattern; calyx and corolla ± 4-angled; sepals acute.................... Kalanchoe peltata var. stapfii 3b. Stems flexuose, cylindrical; petiole slightly widened basally, relatively long; blade strongly peltate to peltate-cordate, crenations shallow and wide, adorned with violet-black blotches; calyx and corolla rounded; sepals obtuse...................................................4 4a. Leaves covered ad- and abaxially with simple, obtuse-tipped hairs; blade often cordate-deltoid......................................................................................................................................................................................................... Kalanchoe peltata var. mandrakensis 4b. Leaves glabrous; blade ovate ............................................................................................................... Kalanchoe peltata var. peltata

Published as part of Smith, Gideon F., Klein, David-Paul & Shtein, Ronen, 2021, A revision of the Malagasy Kalanchoe subg. Kitchingia (Crassulaceae subfam. Kalanchooideae): history, taxonomy, and nomenclature, pp. 67-80 in Phytotaxa 507 (1) on page 77, DOI: 10.11646/phytotaxa.507.1.3, http://zenodo.org/record/5425523