Atriplex sect. Obionopsis (Lange) Dumort., Bull. Soc. Bot. Fr. 20: xiii (1873).

Sukhorukov, Alexander P., Kushunina, Maria & Sennikov, Alexander N., 2022, A new classification of C 4 - Atriplex species in Russia, with the first alien record of Atriplex flabellum (Chenopodiaceae, Amaranthaceae) from North Siberia, PhytoKeys 202, pp. 59-72 : 59

Atriplex sect. Obionopsis (Lange) Dumort., Bull. Soc. Bot. Fr. 20: xiii (1873).

Atriplex ≡ Atriplex [unranked] Obionopsis Lange, Haandb. Danske Fl., ed. 2, [7]: 635 (1859).Type species: Atriplex arenaria J.Woods 1849, non Nuttall 1818 (= Atriplex laciniata L.).

Atriplex Psammophila = Atriplex sect. Psammophila Sukhor., Ann. Naturhist. Mus. Wien 108 B: 388 (2006), syn. nov. Type species: Atriplex dimorphostegia Kar. & Kir.

Description.

Annuals; inflorescences aphyllous or bracteate, rarely leafy in the lower and middle parts; glomerules loosely or densely arranged.

Species.

This section includes A. dimorphostegia Kar. & Kir., A. fominii Iljin, A. kalafganica Podlech, A. laciniata L., A. lasiantha Boiss., A. olivieri Moq., A. ornata Iljin, A. paradoxa Nikitina, A. pratovii Sukhor., A. pungens Trautv., A. recurva d’Urv., A. schugnanica Iljin, A. tatarica L., and A. tornabenei Tineo.

Native distribution.

Members of this section are distributed mostly in the Irano-Turanian floristic region, with extensions into the Mediterranean and Western Europe. Atriplex paradoxa is the only species native to Central Asia (Tian-Shan Mountains). Two species are present in Russia: A. fominii (not shown on the map), which is restricted to the western shore of the Caspian Sea in Dagestan and Azerbaijan ( Iljin 1936; Sukhorukov 2006), and the widely distributed A. tatarica (Fig. 1F ). In the steppe and desert zones of Russia, A. tatarica is considered native based on its presence in natural landscapes (mostly on saline soils).

Nomenclatural notes.

Lange (1859) used unranked infrageneric categories in his classification, whereas Du Mortier (1873) was apparently the first to explicitly rank Obionopsis as a section of Atriplex , but the nomenclatural significance of Du Mortier’s publication was overlooked.

The second edition of Lange’s 'Haandbog i den Danske Flora’ was published in 7 parts during 1856-1859 ( Stafleu and Cowan 1979). These parts were distributed separately by commercial publishers and are therefore effectively published, and the nomenclatural novelties in this work should be cited as published in its parts. The complete book bears no note on the parts and their dates, and no information on the book’s structure and dates is publicly available. According to contemporary announcements of book sales, the concluding part 7 of Lange’s book (with the treatment of Chenopodiaceae) was published in 1859 and consisted of 172 pages, which agrees with the printer’s signatures.

Figures

Figure 1. Schematic distribution areas of C 4 - species of Atriplex native to Russia A A. altaica B A. centralasiatica C A. rosea D A. sibirica E A. sphaeromorpha F A. tatarica. Green - native distribution range, yellow - alien distribution not confirmed after 1930 s, orange - alien distribution confirmed after 1930 s.