Stoebe nervigera (Candolle) Schultz Bipontinus (1861: 179)

Koekemoer, Marinda, 2016, A monograph of Stoebe and Seriphium (Gnaphalieae, Asteraceae) in southern Africa and neighbouring islands, Phytotaxa 242 (1), pp. 448-450 : 448-450

11. Stoebe nervigera (Candolle) Schultz Bipontinus (1861: 179) . Seriphium nervigerum Candolle (1838: 263) . Type:— SOUTH AFRICA. Burchell 7570 (G-DC!, holo., K!, PRE!, iso.).

= Seriphium nervigerum var. squarrosum Candolle (1838: 263) . Type :— SOUTH AFRICA. Ad Zwarte Berge et Olifantsrivier, Drège 5679 (G-DC!, lectotype, designated here; P!, isolectotype).

Vernacular name: Steekblaarslangbos

Small, erect, stiffly branched, rigid shrublets, 0.3 m tall. Branches woolly when young, becoming glabrous with age. Leaves imbricate, ascending or recurved, not twisted, linear-subulate, pungent mucronate, involute, up to 6.0 mm long and 1.5 mm wide at base; abaxial surface glabrous, with a prominent midrib, at the base two conspicuous, lateral, parallel veins, which form the thickened margin in the upper part of the leaf, pitting in between the veins obvious in dried specimens, obscure when fresh; persistent for 3 seasons. Synflorescences of 3–12 capitula in terminal clusters, individual capitula distinct, side shoots developing from below inflorescence. Capitula homogamous, discoid, 1-flowered. Involucral bracts in several rows, the outer shorter, somewhat leaf-like, the inner longer, rich red-copper or light straw-coloured, stiff, taper-pointed, almost as long as the florets, up to 8 mm long. Florets bisexual; white, rarely purple, deeply lobed; corolla lobes narrow, slightly spreading, much longer than those of other species. Stamens 5, apical appendages protruding from the corolla tube for about half their length, basally tailed. Style base slightly swollen. Nectaries present. Cypselas glabrous, with very faint, broad ribs, slightly rugulose between the ribs. Pappus setae 18, stiff, well developed, widened and fused at the base with a few barbs and plumose from near the base, plumes ascending to inclined, delicate and relatively long in lower half, shortening upwards; tips slightly tufted. Flowering March and April, occasionally in February, May and June.

Distribution and habitat: — Western Cape, west of the meridian 22? with disjunct populations around Riversdale and Albertinia in the east, and Rocher Pan in the north-west, and Northern Cape. Figure 29 .

Ecology: —Strandveld, deep sand, gravel, sandy plains at elevations of 0–900 m.

Conservation status: —Least Concern.

Notes: —Sterile specimens can be confused with St. rugulosa , but St. nervigera specimens are generally more robust and have larger leaves.

Additional specimens examined:— SOUTH AFRICA, Western Cape. Vredendal, Katmakoep. Strandveld (3118CB), 8 July 1992, Bayer 6265 (BOL, PRE); Between Heerenlogement and Knager Berg (3118DC/CD), July 1839, Drege (K); Clanwilliam, Grootdrift, SE of Verlorenvlei (3218AD), 8 February 1978, Boucher 3602 (K, NBG, PRE); Between Elandsbay & Lambertsbay (3218AD/AB), 10 April 1994, Beyers 236 (BOL); Klipfontein, Jakalsrivier (3218BA), Drege (P); SW Cape, Rondeklipheuwel A, south of Klipfontein koppe (3218BA), 9 February 1978, Thompson 3645 (K, NBG, PRE); CBS, Clanwilliam (3218BB), Ecklon 500 (76.3) (P); Flora Capensis, Clanwilliam (3218BB), Zeyher (K); Clanwilliam, Piketberg, north of Aurora (3218CB), 29 April 1971, Axelson 419 (NBG); Rocher Pan Nature Reserve, mid section, E side (3218CB), 9 February 1981, Van Rooyen &

72 • Phytotaxa 242 (1) © 2016 Magnolia Press

KOEKEMOER

Ramsey 444 (NBG); Rocher Pan Nature Reserve, E side of reserve, immediately S of house (3218CB), 9 February 1981, Van Rooyen & Ramsey 476 (NBG, PRE); Olifantsrivier (3218DB), Ecklon & Zeyher (SAM); Clanwilliam, Brakfontein (Am Fluss Olifantsrivier und bei Villa Brakfontein) (3219BC), March, Ecklon & Zeyher 500 (76.3) (G, S, SAM, P); Schoongezicht (3219CC), 22 April 1992, Daines 960 (BOL); Zoutrivier near Philadelphia, In sandveld, possibly slightly marshy area (3318DA), 9 November 1976, Esterhuysen 34439 (BOL, S); Malmesbury, about 1, 75 miles S of Kalabaskraal (3318DA), 9 June 1946, Pillans 9973 (BOL); In montibus prope Hex River (3319BD), January 1878, Rehman 5694 (BOL, K); Worcester, gravel flats near Worcester (3319CB), 11 May 1947, Compton 19498 (NBG); Worcester, Brandwacht Valley, hard stoney soil (3319CB), 29 March 1952, Esterhuysen 20024 (BOL, K, NBG, PRE); Just S of Worcester on a patch of white sand on the Riverside rd. (3319CB), 13 March 1991, Koekemoer 627 (PRE); Worcester, Brandvlei (3319CB), 1 May 1933, Markotter US 17951 (NBG); In montibus supra Worcester (3319CB), 1875–1880, Rehman 2619 (K); Worcester, 4 miles S of Worcester (3319CB), 27 March 1955, Rycroft 1877 (NBG); Worcester commonage (3319CB), 21 April 1965, Van Breda & Joubert 1810 (PRE); Worcester (3319CB), 6 May 1947, Van Breda 6 (PRE); Stettynsberg (3319CD), 31 July 1949, Esterhuysen 15627 (BOL); Zoetmelks Valley, Caledon div. (3419BA), 13 February 1815, Burchell 7570 (G-DC, K, PRE); Mountains of Baviaanskloof near Genadendal, Caledon div. (3419BA), 27 February 1815, Burchell 7826 (K, P); Caledon, Greyton (3419BA), 12 March 1933, Gillett 879 (BOL, NBG); Near Genadendal (3419BA), March 1935, Levyns 4865 (BOL); Terra Capensis, Elim (3419DA), 21 April 1896, Schlechter 7668 (BOL, G, K, P); Elim

STOEBE AND SERIPHIUM ( GNAPHALIEAE )

Phytotaxa 242 (1) © 2016 Magnolia Press • 73 (3419DA), 21 April 1896, Schlechter 794 (PRE); 21 km from Albertinia to Riversdale (3421AB), 2 April 1996, Koekemoer 1284 (PRE); Takkiesfontein Farm, Droëvlakte, Riversdale (3421AD), 18 March 1980, Bohnen 7481 (NBG, PRE); Albertinia, 29 km from Riversdale (3421BA), 4 March 1991, Koekemoer 561 (PRE); Between Albertinia and Riversdale, near Resiesbaan siding (3421BA), 4 March 1991, Koekemoer 562 (PRE); Flats above Albertinia (3421BA), June 1914, Muir 1352 (BOL, PRE); Riversdale div., Albertinia (3421BA), January 1940, Stokoe 7292 (PRE); Riversdale, 7 km E of Albertinia, roadside (3421BA), 14 March 1978, Thompson 3741 (K, NBG, PRE); In Karroideis, between Worcester and Cogmanskloof, April 1887, Bolus 8097 (BOL, K, NBG); Klein Dassenberg, near Clandmill Chicken farm, close to smallholdings, 28 April 1992, Daines 976 (BOL); S. Africa, Drege (G, K); Hopefield, Elandsfontein, Jessop 512 (BOL); Cape Town-Malmesbury road, 30 miles from N9, 9 March 1973, Montgomery 386 (NBG); CBS, Mund (K). Northern Cape. Namaqualand, Farm Kap Vley 315, 4, 7 km W of Kommaggas, Soebatsfontein rd to Brandberg (2917CD), 20 October 1986, Le Roux & Lloyd 730 (NBG, PRE); Nieuwoudville plateau (3119AC), 19 March 1948, Acocks 14159 (PRE); Calvinia dist., Oorlogskloof, Nieuwoudtville (3119AC), 1 June 1964, Esterhuysen 30724 (BOL, K); Calvinia, top of Van Rhyns Pass , 3 km on road to Nieuwoudtville (3119AC), 5 February 1982, Goldblatt 6532 (K, PRE).

Figures

FIGURE 29:—Known distribution of Stoebe nervigera in South Africa.