Caroxylon nollothense (Aellen) Mucina, 2017

Mucina, Ladislav, 2017, Caroxylon (Chenopodiaceae s. str.) in continental southern Africa and Madagascar: a preliminary nomenclatural synopsis and biogeographical considerations, Phytotaxa 312 (2), pp. 151-178 : 167

63. Caroxylon nollothense (Aellen) Mucina comb. nov. ( Fig. 1 , G)

Basionym:― Salsola nollothensis Aellen in Mitt. Bot. Staatssamml. München 4: 24 (1961).

Type:― SOUTH AFRICA. Cape Colony [Northern Cape Prov.]: Port Nolloth, 17 January 1907, Galpin & Pearson 7545 (holotype PRE 0375576-1! & PRE 0375576-2! ; isotypes K-000243909!, NBG-SAM0001675-0!) .

‒ Salsola bullata Fenzl ex Drège in Flora 26(29), Beigabe: 94, 217 (1843), nom. nud. (Art. 38.1a of ICN).

‒ Salsola candida Schinz in Bull. Herb. Boiss. 5, App. 3: 62 (1897) nom. nud. (Art. 38.1a of ICN), non S. candida Fenzl ex Moq. in DC. Prodr. 13(2): 191 (1849).

‒ Salsola flexuosa C.A.Sm. ex Ulbr. in Engl. & Prantl in Natürl. Pflanzenfam., ed. 2, 16c: 566 (1934), nom. nud. (Art. 38.1a of ICN).

‒ Caroxylon sp. M: Mucina & Snijman in Plants of the Greater Cape Floristic Region. Vol. 2: The Extra Cape flora: 235 (2013).

Notes: ―The collection SAM0001675-0! (isotype of this taxon) is erroneously featured as an isotype of Salsola zeyheri in the http://plants.jstor.org depository. Wright (1912: 453–454) listed S. bullata as an imperfectly known species and cited a Drège specimen (herbarium lodging unknown) collected in the Orange (Gariep) River mouth. The voucher Z-000002799! (K. Dinter 5995, Lüderitzbucht) is designated as paratype on a voucher sheet in Z; this choice was not very fortunate since Z-000002799! Is not from the locus classicius of C. nollothense (Port Nolloth, South Africa).

Distribution: ―Namibia: Namib coast (from Oranjemund as far north as Skeleton Coast); Namibian inland collections ascribed to this taxon have most probably been misidentified; South Africa (NC): Richtersveld coast. Ulbrich (1934: 566) claims that this taxon occurs as far north as Angola.

Figures

FIGURE 1. Representative taxa of the genus Caroxylon from southern Africa.A: C. tetramerum, SouthAfrica, Knersvlakte, Moedverloor NR near Lutzville, local endemic of the quartz patches; B: C. verdoorniae, South Africa, Little Karoo, Groot Phesantefontein, local endemic of the quartz patches; C: C. contrariifolia, South Africa, Knersvlakte, loamy, shale-derived soil supporting succulent scrub, Lankverwag Farm near Vanrhynsdorp (inset: detail of fertile branch); D: C. zeyheri, South Africa, Knersvlakte, gannabosveld (succulent scrub dominated by gannabos, vernacular name for Salsola/Caroxylon) near Vanrhynsdorp; E: C. etoshensis, Namibia, Etosha National Parl, Okaukuejo, saline calcrete flats along edges of the large Etosha Pan; F: C. divaricatum, SouthAfrica, Olifants River mouth, supratidal saline flats fringing an old estuary system; G: C. nollothensis, South Africa, Namaqualand, Port Nolloth, McDougalls Bay, shell-rich coastal dunes.All photos by L. Mucina.