taxonID	type	description	language	source
03D9DA488C688F1EFF5DFB7CFE1A8F1D.taxon	type_taxon	Type: — non designatus fide Farr & Zijlstra (1996 +).	en	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): 239-247, DOI: 10.11646/phytotaxa.564.2.7
03D9DA488C688F1EFF5DFB7CFE1A8F1D.taxon	discussion	Type: — Cotyledon oppositifolia Ledeb. ex Nordmann (1837: 313) (Turland et al. 2018: Art. 40.3). Name in Chiastophyllum: Chiastophyllum oppositifolium (Ledeb. ex Nordm.) Stapf (1930: 316 – 317); name in Umbilicus: Umbilicus oppositifolius (Ledeb. ex Nordm.) Ledebour (1843: 176).	en	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): 239-247, DOI: 10.11646/phytotaxa.564.2.7
03D9DA488C688F1EFF5DFA54FC118DDD.taxon	materials_examined	Type: — ““ Caucasus ” (Nordmann 329 [LE]) ” fide Walker (2003: 366, as “ T ”, i. e., “ (nomenclatural) type ”, see Eggli 2003: X).	en	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): 239-247, DOI: 10.11646/phytotaxa.564.2.7
03D9DA488C688F1EFF5DFA54FC118DDD.taxon	discussion	Taxonomic placement of Chiastophyllum and Umbilicus oppositifolius: — At present Chiastophyllum is usually treated as a section in Umbilicus, as U. sect. Chiastophyllum, with the genus included in the Telephium clade of Crassulaceae subfam. Sempervivoideae (Eggli et al. 1995: 179, 191, Walker 2003: 364, Thiede & Eggli 2007: 97, Messerschmid et al. 2020: 893). Umbilicus sect. Chiastophyllum is monotypic, with U. oppositifolius the only included species. Umbilicus oppositifolius has fibrous roots, while the roots of all other species of Umbilicus are tuberous or rhizomatous. The leaves of U. oppositifolius are not peltate and are more or less ovate, whereas all its congeners have more or less peltate leaves with the leaf blades varying little from an orbicular outline (Fig. 2) (Smith & Figueiredo 2011). The flowers of U. oppositifolius range from light to bright yellow and are carried in branched, arched inflorescences (Fig. 1). Selected forms of the species are available in the horticultural trade.	en	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): 239-247, DOI: 10.11646/phytotaxa.564.2.7
