Loxocarpus pauzii T.L.Yao, 2012

Loxocarpus pauzii T.L.Yao View in CoL , sp. nov. — Fig. 1

Ab omnibus speciebus Loxocarpi in corolla profunde divisa 4-lobata (non 5-lobata) differt. — Typus: Yao et al. FRI 65371 View Materials (holo KEP; iso E, L), Peninsular Malaysia, Kelantan, Gunung Stong State Park , Stong Waterfall , 315 m alt., 05°20'N, 101°58'E, 26 July 2008 GoogleMaps .

1 Forest Research Institute Malaysia, 52109 Kepong, Selangor, Malaysia; corresponding author e-mail: yaotzeleong@frim.gov.my.

2 University of Malaya, 50603 Kuala Lumpur, Malaysia.

Etymology. This species is named after Pauzi Husin (1976–2011), a nature guide who first discovered it.

Rosette plant. Rootstock short, woody, to 3 cm long, 5 mm diam, with wiry adventitious roots. Indumentum of stem and leaves silvery when dry, mainly of straight uniseriate, multicellular silky non-glandular hairs: on rootstock dense, 1–1.5 mm long, on the petiole very dense, 1–2 mm long, on the upper surface of the lamina dense, c. 0.85 mm long, on the veins of the lower surface of the lamina less dense, 0.4 –0.85 mm long, on the lower surface of the lamina sparse, c. 0.3 mm long, on the bracts and bracteoles dense, 0.3 mm long; indumentum of inflorescences and flowers a mix of non-glandular and glandular hairs: on the peduncle with dense, non-glandular hairs c. 1 mm long and glandular hairs c. 0.25 mm long; on the pedicel, the outer surface of the calyx, corolla, and ovary with dense, glandular purple hairs c. 0.25 mm long, turning brown with age. Leaves alternate, crowded; petioles in life pale green, slender, the uppermost ones 2 – 3 cm long, the lowermost ones elongating to 5 –11 cm long, terete, c. 1 mm diam; laminas in life dull dark green to greyish green above, paler beneath and concolourous with the petiole, suborbicular to reniform, 1.5 – 3 by 2 – 3 cm, c. 0.6 mm thick, base cordate to truncate, margin crenulate, apex acute in young leaves becoming rounded in fully expanded ones; secondary veins 4– 5 pairs, sunken above, prominent beneath. Inflorescences axillary, many-flowered paniculate cymes up to 4-times branched with 11–42 flowers, young peduncle brownish red becoming purplish, slender, 14–18 cm long, to 2 mm thick; bract pair green, narrowly oblanceolate, c. 1.4 by 0.3 mm, apex rounded; bracteoles single or paired, green, narrowly oblanceolate, apex rounded, c. 0.6 by 0.2 mm, pedicels purple, 5 –7 mm long. Flowers: calyx light green, 5-lobed, divided to the base, lobes c. 2 by 1 mm, surface of the inner lobe with three darker coloured veins; corolla plain lilac, tube very short, c. 2 mm long, limb deeply divided, lobes 4, darker toward the base, upper lobe deltoid, c. 3 by 3 mm, apex scarcely notched, lateral 2 lobes spreading, narrowly ovate, c. 4 by 2 mm, apex narrowly rounded, lower lobe longest, concave, margin incurved, c. 5 by 2.5 mm; stamens 2, positioned below the pistil, filaments curved, white tinged light green near base, pale lilac above, c. 2 mm long, bowed towards the lower corolla lobe; anthers connate face-to-face, bilobed, partly exposed in the corolla mouth, yellow, c. 1.3 by 0.5 mm; nectary a narrow, thin rim, partly encircling the ovary base; ovary conical, c. 1.5 by 0.7 mm, style lilac, c. 6 mm long, protruding beyond the corolla lobes, stigma minute, rounded, deep purple. Capsules dark brown, straight, slender, 4-angled, 7.5– 8 by 0.8 – 0.9 mm; splitting open dorsally; calyx and style persistent. Seeds ellipsoid, 320 –430 by 150– 230 μm, apex acute, surface pattern reticulate.

Distribution — Endemic in Peninsular Malaysia: Kelantan, Gunung Stong State Park, Stong Waterfall.

Habitat — On shaded to partially shaded wet granite cliff faces or on boulders c. 500 m altitude or on soil with thin humus layer under bamboo clumps at c. 315 m altitude.

Other specimens examined. PENINSULAR MALAYSIA, Kelantan,Gunung Stong State Park, Stong Waterfall, Pauzi FRI 65285 (KEP), FRI 65370 (KEP); Yao FRI 55876 (KEP).

Note — All other Loxocarpus species have a 5-lobed corolla. The deeply divided 4-lobed corolla of this species is the result of fusion of the upper two lobes.