Nolletia annetjieae P.P.J.Herman, 2013
publication ID |
https://doi.org/ 10.11646/phytotaxa.122.1.1 |
persistent identifier |
https://treatment.plazi.org/id/722F8791-FFD4-FF9E-FF1F-FDB6020307FA |
treatment provided by |
Felipe |
scientific name |
Nolletia annetjieae P.P.J.Herman |
status |
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12. Nolletia annetjieae P.P.J.Herman View in CoL sp. nov. ( Fig. 14 View FIGURE 14 )
Similar to Nolletia chrysocomoides but with fewer and narrower leaves and circular epicarpic cells on cypsela surface scattered and arranged in pairs, each pair with one small twin hair between them. Also similar to Nolletia rarifola but cypselae of that species with oblong epicarpic cells and with dark oil sacs on involucral bracts.
Type:— SOUTH AFRICA. Northern Cape: Kgalagadi Transfrontier Park, 6 km NE of Gharagab Wilderness Camp , (QDS: 2520 AA Mata Mata), 16 May 2010, Koekemoer 3901 (holotype PRE!, isotypes K, PRU, US, WIND) .
Iconography:— Van Rooyen et al. (2001, Fig. p. 195, as N. arenosa ).
Sparsely to scattered leafy, sometimes almost leafless, virgate or caespitose suffrutex, rarely a small shrub, from woody, vertical rootstock, (0.25–)0.3–0.6(–1) m high. Stems wiry, simple or sparsely branched, greenish or yellowish brown at base, herbaceous and green upwards; glabrous to sparsely appressed pubescent, more densely so at tips and below capitula. Leaves alternate, sparsely set, held close to stem, sessile, linear-filiform, lower leaves (7–)10–20(–40) × (0.2–)0.5(–1.0) mm, decreasing in size upwards; apex acute; margin entire; glabrous or sparsely to densely appressed pubescent on both surfaces. Capitula heterogamous, disciform, 8– 10 mm in diameter, arranged in few-headed, loose corymbs or rarely solitary, terminal. Involucre campanulate. Involucral bracts imbricate, in 3 or 4 rows, green, often tinged purplish, persistent and recurved in old inflorescences; outer row mostly narrowly ovate or narrowly triangular to narrowly elliptic, 1.3–2.2 × 0.3–1.0 mm, apex acute to acuminate, with fimbriate margins, appressed pubescent; second row varying from narrowly elliptic to narrowly oblong or narrowly ovate to narrowly obovate, 2–3 × 0.5–1.0 mm, apex acute, with narrow membranous, fimbriate margin, appressed pubescent; third row mostly narrowly obovate, but also narrowly elliptic to narrowly oblong, 2.1–4.0 × 0.8–1.0 mm, apex acute, with membranous, fimbriate margin, appressed pubescent; inner row narrowly obovate to narrowly elliptic, 3.2–4.1 × 0.5–1.0 mm, apex acute to acuminate, with membranous, fimbriate margin, central part appressed pubescent. Receptacle epaleate, foveolate. Outer female florets 13–20, in 1 row, fertile, filiform; tube 1.0– 1.5 mm long, shorter than style furcation, with numerous glandular hairs; corolla pale yellow, sometimes purplish at apex. Style 1.5–3.0 mm long, bifurcate; style branches elliptic, 0.5–1.0 mm long, apex rounded; stigmatic areas marginal, confluent at apex. Pappus and cypsela as in disc florets. Disc florets 26–43, regular, bisexual, fertile; tubular at base, tube 2–3 mm long, widening slightly after ± 1 mm but still tubular, then widening further upwards towards lobes, lobes 5, 0.5–1.0 mm long; with glandular hairs around first widening and few glandular hairs on lobes; corolla yellow or sometimes upper part of tube and lobes purplish. Anthers 0.6–1.6 mm long, with narrowly ovate apical appendages; bases shortly calcarate, ecaudate; filament collars with thickened cell walls. Style 1.5–3.5 mm long, bifurcate; style branches linear, 0.5–1.0 mm long; stigmatic areas marginal, with deltoid-penicillate apical appendages. Cypsela honey-coloured, shiny, narrowly obovoid, laterally compressed, often skew to 1 side, 1.5–2.5 × 0.5–1.0 mm ( Fig. 1K View FIGURE 1 ); surface with scattered, circular to elliptic epicarpic cells arranged in pairs, each pair with 1 short twin hair between them ( Figs. 2H View FIGURE 2 , 3E, F View FIGURE 3 ), apices of twin hairs acute, slightly subequal in length. Pappus of caducous, barbellate bristles, 2.0– 3.2 mm long. Flowering time: from December to August, with a peak from January to May.
Distribution and habitat:— Namibia, Botswana, North-West (doubtful locality), Northern Cape ( Fig. 15 View FIGURE 15 ), growing in sand. The conservation status of this species is not currently known but judging from the number of specimens in herbaria, probably LC (Least Concern).
Discussion:— Similar to N. chrysocomoides but distinguished by the long, simple twigs with very few and very narrow leaves and by the circular epicarpic cells scattered and arranged in pairs, with a single, short twin hair between each pair. Also very similar in appearance to N. rarifolia but without dark oil sacs on involucral bracts and cypselae with paired circular epicarpic cells as opposed to oblong epicarpic cells in N. rarifolia .
Note: —The plant described by Van Rooyen et al. (2001) as N. arenosa (= N. chrysocomoides ) is most probably N. annetjieae as all the specimens in PRU collected by Van Rooyen , previously identified as N. arenosa , were re-identified as this species. Van Rooyen et al. (2001) regarded N. arenosa as endemic to the southwestern Kalahari.
Etymology:— Named for my younger daughter Annetjie.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.