Smith, Gideon F. & Monro, Anna M., 2022, Notes on the nomenclature and taxonomy of Chiastophyllum and Umbilicus oppositifolius (≡ Cotyledon oppositifolia, ≡ Chiastophyllum oppositifolium) (Crassulaceae subfam. Sempervivoideae)

Smith, Gideon F. & Monro, Anna M., 2022, Notes on the nomenclature and taxonomy of Chiastophyllum and Umbilicus oppositifolius (≡ Cotyledon oppositifolia, ≡ Chiastophyllum oppositifolium) (Crassulaceae subfam. Sempervivoideae), Phytotaxa 564 (2), pp. 239-247

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https://doi.org/10.11646/phytotaxa.564.2.7

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https://doi.org/10.11646/phytotaxa.564.2.7

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