Nolletia zambesica R.E. Fries (1914: 331)

Herman, Paul P. J., 2013, Cypsela morphology in the genus Nolletia (Asteraceae, Astereae) and a revision of the genus, Phytotaxa 122 (1), pp. 1-44 : 31-32

10. Nolletia zambesica R.E. Fries (1914: 331) ; Merxmüller (1967: 120); Wild (1975: 21); Gibbs Russell et al.

(1984: 125; 1987: 216); Herman (1993: 714; 2003: 261); Craven (1999: 162); Klopper et al. (2006: 142).

Type:— ZIMBABWE. Victoria Falls , on Livingstone Island, (QDS: 1725 DD Livingstone), 31 July 1911, Fries

165 ( holotype UPS, e!) .

= Nolletia rhodesiana S.Moore (1917: 104) . Type :— ZIMBABWE. Victoria Falls, (QDS: 1725DD Livingstone), May 1915, Rogers 13299 (holotype BM e!, isotypes BOL!, Z e!).

Scattered to densely leafy, regularly branched, suffrutex or small shrub, up to 1.3 m high; older branches brown, glabrescent, younger branches tawny to green, appressed pubescent. Leaves alternate, sessile, linear to narrowly elliptic to narrowly oblong, 10–45 × 2–5 mm; apex acute; margin entire; sparsely to fairly densely appressed pubescent, bright to dark green. Capitula heterogamous, disciform, about 10 mm in diameter, loosely corymbosely arranged at ends of branches, pedunculate. Peduncle appressed pubescent with 1 or 2 bracts. Involucre campanulate. Involucral bracts imbricate, in 3 rows, persistent after flowering, recurved; outer row ovate, 2.0–2.2 × 0.5 mm, acute, margin fimbriate, appressed pubescent; middle row oblong to narrowly obovate, 3.0–3.5 × 0.8–1.0 mm, acute to acuminate, with narrowly membranous, fimbriate margin, appressed pubescent; inner row narrowly obovate, 3–4 × 0.5–1.0 mm, acute to acuminate, with broader membranous, fimbriate margin, appressed pubescent. Receptacle epaleate, foveolate. Outer female florets up to 35, in 1 row, fertile, filiform; tube 1.4–2.0 mm long, shorter than style furcation, with glandular hairs; corolla pale yellow. Style 1.6–2.0 mm long, bifurcate; style branches oblong-elliptic, 0.5 mm long; stigmatic areas marginal, confluent at apex. Cypsela and pappus as in disc florets. Disc florets up to 76, regular, bisexual, fertile; tubular below, tube 1.5–2.0 mm long, with glandular hairs, widening upwards, campanulate upper part 1–2 mm long; 5-lobed, lobes 0.5 mm long; corolla yellow. Anthers 1.5 mm long; with ovate apical appendage; shortly calcarate, ecaudate at base; filament collar with thickened cell walls. Style 2–3 mm long, bifurcate; style branches oblong, up to 1 mm long, with deltoid-penicillate apical appendages; stigmatic areas marginal. Cypsela brownish, obovoid, 1.8–2.0 × 0.6–0.7 mm ( Fig. 1I ), surface shining because of circular epicarpic cells, covering surface of cypsela, each with a short, twin hair, subequal in length, apices of twin hairs acute. Pappus of barbellate bristles in 1 row, ± 3 mm long, caducous. Flowering time: from December to May (July).

Distribution and habitat: —Northern Namibia, north-western Botswana, Zambia and Zimbabwe ( Fig. 10 ). Along rivers, on riverbanks in sandy soil. The conservation status of this species is not currently known.

Figures

FIGURE 1. Cypselae of Nolletia species as seen under the stereomicroscope: (A) N. gariepina (Warren 78, PRE); (B) N. tenuifolia (Giess 10863, PRE); (C) N. ciliaris (Jacot Guillarmod 377, PRE); (D) N. jeanettae (Bester 8534, PRE); (E) N. welmaniae (Winter 7649, PRE); (F) N. rarifolia (Van Hoepen 1825, PRE); (G) N. ruderalis (Compton 27385, PRE); (H) N. vanhoepeniae (Koekemoer 3899, PRE); (I) N. zambesica (Maguire 1693, PRE); (J) N. chrysocomoides (Merxmüller & Giess 3579, PRE); (K) N. annetjieae (Van Rooyen 3714, PRE). Photographs by P.P.J. Herman.

FIGURE 10. Known geographical distribution of N. rarifolia (̝), N. zambesica (●) and N. chrysocomoides × N. annetjieae (․). The grey dot representing Ngamiland as there was no specific locality.