Stoebe rugulosa Harvey (1865: 282)

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

15. Stoebe rugulosa Harvey (1865: 282) . Type :— SOUTH AFRICA. Breede River, Mundt s.n. (K!, holotype; TCD).

Small erect, woody shrub with whip-like branches, up to 0.4 m tall. Branches covered with white wool when young, becoming more or less glabrous later. Leaves small, rarely more than 2 mm long, adpressed, imbricate or just touching the leaf above, linear-subulate; abaxial surface glabrous, with three clearly distinguishable parallel veins which are generally of a lighter colour than the rest of the leaf, dry leaves appearing to be pitted between the veins; the middle vein exending in a short outward projecting mucro at leaf apex. Synflorescences terminal, loose aggregations of capitula in leaf axils. Capitula homogamous, discoid, 1-flowered. Receptacle reduced to short stalks on an inflated branch tip. Involucral bracts 10; outermost short and somewhat leaf-like; inner scarious, mostly obtuse, very often with three teeth, rarely subacute, a little longer than the corolla tube, reaching the lobe

STOEBE AND SERIPHIUM ( GNAPHALIEAE )

Phytotaxa 242 (1) © 2016 Magnolia Press • 79 sinuses, 4 mm long. Florets bisexual; pink; corolla lobes narrow, spreading, 1.3 long. Stamens 5, apical appendage lanceolate, basally tailed, often exserted from tube at maturity. Style bifid, base slightly swollen. Nectaries present. Cypselas cylindrical, surface smooth, annulus a prominent ridge. Pappus setae 15, a little shorter than the corolla, slightly fused at the base, plumose, plumes ascending. Flowering March and April.

Distribution and habitat: — Western Cape, between Caledon and Albertinia. Figure 33 .

Ecology: —Rocky soils, often on shale and in rhenosterveld; at low elevations, 100–300 m.

Conservation status: —Endangered.

Notes: —Sterile specimens of this species can be confused with St. nervigera , and its flowering specimens are very similar to St. fusca . The synflorescences, however, differ completely from those of St. nervigera , whereas St. rugulosa can be distinguished from St. fusca by the leaf morphology.

Additional specimens examined:— SOUTH AFRICA, Western Cape. Without locality: Marloth 8089 (PRE); Robertson , Langvlei in Euclea-Carissa bushveld (3319DC), 22 April 1965, Van Breda & Joubert 1826 (PRE); Caledon div., Riviersonderend Mts. , Skilpadkop (3419BA), April 1941, Stokoe SAM57707 (SAM); 29 km from Swellendam on N2 to Riviersonderend (3420AA), 3 March 1991, Koekemoer 556 (PRE); Bontebok Park, Swellendam, flats N of Elsieskraal, rhenosterveld (3420AB), 11 December 1983, Burgers 3220 (NBG); Bredasdorp, Bontebok Park (3420AB), 16 April 1950, Compton 21931 (NBG); Swellendam, Bontebok Nature Reserve , at turn-off to Elsieskraal (3420AB), 3 March 1991, Koekemoer 558 (PRE); Swellendam, Bontebok Park

80 • Phytotaxa 242 (1) © 2016 Magnolia Press

KOEKEMOER

(3420AB), March 1963, Liebenberg 7164 (K, NBG, PRE); Swellendam, National Bontebok Park (3420AB), September 1963, Liebenberg 7259 (PRE); Bredasdorp, Bontebok Park (3420AB), 17 February 1951, Maguire 831 (BOL, NBG); 13.3 mile NE by E of Malgas, coastal Rhenosterveld (3420BA), 27 October 1963, Acocks 23377 (PRE); Bredasdorp, 18 miles S by E of Buffelsjachts River (3420BC), 04 December 1968, Acocks 24172 (K, NBG, PRE); Bredasdorp, Potberg near homestead (3420BC), 18 March 1977, Hugo 855 (K, NBG, PRE); Riversdale, Koerente Riv. road 5km NW of Riversdale (3421AA), 13 March 1978, Thompson 3683 (NBG, PRE); 21 km from Albertinia to Riversdale (3421AB), 2 April 1996, Koekemoer 1285 (PRE); Near Riversdale (3421AB), August 1929, Muir 4493 (PRE); Near Riversdale (3421AB), Muir PRE44531 (PRE); Oude Tuin near Albertinia (3421BA), 5 May 1915, Muir 1999 (BOL, PRE); On hills near Breede River, 26 January 1815, Burchell 7471 (K); Oakdale, Riversdale, October 1934, Levyns 4815 (BOL); Oakdale in flats, April 1923, Muir 2544 (BOL, PRE); Breede river, Mund (K).

Figures

FIGURE 33:—Known distribution of Stoebe rugulosa in South Africa.