Garcinia exigua Nazre, 2018

Nazre, M., Newman, M. F., Pennington, R. T. & Middleton, D. J., 2018, Taxonomic Revision of Garcinia Section Garcinia (Clusiaceae), Phytotaxa 373 (1), pp. 1-52 : 28

5. Garcinia exigua Nazre , sp. nov.

Garciniae nitidae similis sed foliis multo minoribus 0.8–2.1 × 0.3–1 cm (non 5–8.5 × 2.9–3.8 cm), fructibus minoribus (9.5–10.5 × 8.5–11 mm) stigmate sessili vel subsessili (non ad 10 mm elongata) valde recedit.

Type:— MALAYSIA Borneo, Sarawak, Bintulu , Buan Forest Reserve , 18 September 1972, Paul Chai S 31750 (Holotype: SAR!; isotype: L!). [ Figure 10 ] .

Tree to 20 m tall. Bole with dark brown, flaking, smooth and dippled bark; inner bark reddish. Exudate yellow. Twigs angled, stout, finely wrinkled longitudinally when dry, dark brown to pale brownish green, sometimes with a very small leaf-like terminal bud. Petiole finely transversely striate, dark brown or pale brown, to 0.5 cm long. Lamina thickly leathery, pale brown or greenish brown, shiny above, elliptic, 0.8–2.1 × 0.3–1 cm, apex acute or bluntly acuminate, base acute to cuneate; midrib raised above and below; margin entire and finely revolute; secondary veins very faint to nearly invisible above, fine and inconspicuous below, brochidodromous; tertiary veins invisible. Glands clearly visible below, fine and slightly raised above and raised below, arranged in dark grey-black to greenish interrupted wavy lines, running nearly parallel to the midrib. Inflorescences probably terminal. Male flowers not seen. Female flowers not seen. Fruit globose or ellipsoid, shiny green turning yellow, wall smooth with fine longitudinal striae, dark maroon to brown, small, 9.5–10.5 × 8.5–11 mm; stigma sessile or slightly raised, flattened, discoid or convex, weakly 4-lobed or crenate, black rugose, to 4.5 mm across; with four persistent leathery sepals; seeds not known.

Etymology:—Latin, from the small size of all parts in the specimens.

Distribution and Habitat:—Rare and endemic species in Borneo, only represented from three localities in lowland and hill forest in Sarawak and Brunei.

Taxonomic Notes:—The fruits and leaves closely resemble those of G. nitida Pierre except that they are smaller.

Additional specimens examined:— MALAYSIA. Borneo: Sarawak: Mulu National Park, Ubong, Sungai Matong, 11 November 1990, Yii & Runi Pungga S57293 (K!, SAR!), 19 November 1990, Yii & Runi Pungga S61132 (K!, SAR!).

BRUNEI: Temburong: Ulu Belalong, Ulu Belalong, 22 January 1994, Coode, Dransfield, Kirkup & Idris 7886 (A!).

Figures

FIGURE 10. Garcinia exigua Nazre. A. habit (female); B. glandular lines; C: fruit and stigma [Chai S31750, SAR]. Drawn by Anna Dorward.