(2797) Proposal to reject the name <i>Chenopodium pallidum</i> ( <i>Chenopodiaceae</i> / <i>Amaranthaceae</i> sensu <scp>APG</scp> )

(2797) Chenopodium pallidum Moq., Chenop. Monogr. Enum.: 30. Mai 1840 [Angiosp.: Chenopod. / Amaranth.], nom. utique rej. prop. Lectotypus (vide Sukhorukov & Kushunina in Phytotaxa 191: 14. 2014): [India or Nepal?], Jacquemont 1377 (P barcode P04993339). Epitypus Nepal. 566 (MW MW0595517). The paradoxical nomenclatural situation with the name Moq. (Chenop. 1840) has been already discussed detail by Mosyakin McNeill (in 376: 133–137. 2018) and Mandák Ukrayins'k. Bot. Zhurn. 77: 413–427. 2020). It is only briefly summarized here. was described Moquin-Tandon (l.c.; amended description Candolle, Prodr. 13(2): 61. 1849) as occurring “in Indiâ orientali”, based on one gathering of (“Jacquem. 1377”) Paris herbarium (“v. s. herb. Mus. Paris.”), now known to be represented four specimens at P. That remained obscure for a long time but recently resurrected from oblivion 2014), who designated simultaneously its lectotype (P04993339, image available https://science.mnhn.fr/institution/mnhn/collection/p/item/p04993339; all online resources accessed 24 Oct 2020) epitype (MW0595517, https://plant.depo.msu.ru/open/public/ru/item/MW0595517) applied species Chenopodium. Later 226: 288–291. 2015) re-considered evidence concluded that other original C. belong Atriplex, most probably A. schugnanica Iljin Trudy Inst. Akad. Nauk S.S.S.R., Ser. 1, Fl. Sist. Vyssh. Rast. 2: 123. 1936a), whereas indeed new combination Atriplex pallida (Moq.) Sukhor. Kushunina, l.c. 2015: 288) coined while harae 290; ‘harai'), holotype being same specimen pallidum. As explained (l.c.) further (l.c.), this resulted following situation: pallidum, epitypification (but not lectotypification!), (since 2014) correct Himalayan Chenopodium, despite fact belongs are thus homotypic synonyms However, recent monograph Tibetan representatives Chenopodiaceae (Sukhorukov al. PhytoKeys 116: 23–24, 44–45. 2019) conclusions were mentioned, any mention earlier also omitted, names used nomenclaturally incorrectly, exactly outlined (l.c. 2015). Despite discussions, recommendations proposals amend Code regarding cases when an type it supports differ taxonomically (see McNeill, l.c.; Mazumdar Taxon 69: 631. 2020; Lendemer 849–850. 2020, references therein), present such inappropriate epitypifications can dealt through conservation rejection procedure (Art. 9.20 ICN: Turland Regnum Veg. 159. – assuming, is, lost destroyed, supported retains status. considered three possible options solving problem conflicting lectotypification One option just retain status quo. second propose conserved than standing (e.g., another single cited protologue). If hypothetical proposal accepted, (belonging Chenopodium) would have no because which linked typifying author Note 8 ICN), currently properly schugnanica, become called due (Mosyakin Mandák, l.c.). case pity submerge into synonymy established 1936a) accepted main publications databases, e.g., Komarov, SSSR [Fl. URSS] 6: 97. 1936b), Grubov Tsentral. Azii [Pl. Asiae Centr.] 32. 1966), Sidorenko Ovchinnikov, Tadzhiksk. SSR 3: 338. 1968), Pratov Vvedensky, Opred. Sred. [Consp. Mediae] 50. 1972), Podlech Mitt. Staatssamml. München 12: 59, 85. 1975), Anders 13: 412. 1977), Czerepanov (Vasc. Pl. Russia Adjacent States: 181. 1995; Sosud. Ross. Sopred. Gosud.: 347. 1995), Hedge Rechinger, Iran. 172: 78. 1997), Ali Qaiser, Pakistan 204: 67. 2001; ed.: http://legacy.tropicos.org/Name/7200993?projectid=32), Klimeš Dickoré Willdenowia 35: 132. 2005), Ann. Naturhist. Wien, B, 108: 384. 2006), Plants World Online (2020–: http://www.plantsoftheworldonline.org/taxon/urn:lsid:ipni.org:names:164138-1), Checklist Vascular https://wcvp.science.kew.org/taxon/164138-1), etc. Obione (Iljin) G.L. Chu [Zhu Gelin] Zhu Sanderson, Gen. New Evol. System Chenopod.: 166. 2017). Moreover, P (all belonging Atriplex) completely mature (“gathered vegetative early blooming stage”: 288), there remain some doubts their actual identity. In particular, “Atriplex Kranz leaf anatomy” region, centralasiatica 1936a: 124), pamirica mentioned “the plants best match Jacquemont's aphyllous bracteose (not leafy) inflorescence”. Thus, we assume still possibility these may Atriplex. contrast rather wide acceptance above), forgotten restored (though conflict real generic identity specimens) 2014, 2015; al., l.c.), moreover, incorrectly two publications. third rejection. After considering pros contras above, arguments presented think escape confusing reject long-forgotten our will safeguarded montane Central Asian epitypification. We under Art. 56 ICN decision radically resolve issue serve stability. SLM, https://orcid.org/0000-0002-3570-3190 BM, https://orcid.org/0000-0002-9545-7497 grateful John (Royal Botanic Garden, Edinburgh, Scotland, U.K. Royal Ontario Museum, Toronto, Ontario, Canada) his valuable advice nomenclature editorial comments.