Aspidistra laongamensis C.R.Lin & X.Y.Huang – Taiwania 63(4): 393. (2018).
Laos: Saravan Province, Laongam City, Saesed natural reserve, 106°16′29″E, 15°29′42″N, alt. 198 m a.s.l., 12 December 2017, Wei-Bin Xu, Xue-Yan Huang, Koson Sosoulithan, et al. LAOS171212077 (holotype: IBK, isotype: GXMG).
Paratype: Vietnam, Hoa Binh Prov., Lac Son Distr., Tu Do Municipality, Mon village, around point 20°25′29′′ N, 105°19′36′′ E. Primary broad-leaved forest on steep rocky slopes of remnant mountain composed of solid crystalline highly eroded limestone at elevation about 500–700 m a.s.l., 25 Mar 2011, L. Averyanov, L. Osinovetz, T. Maisak et al., CPC 1566b (LE).
Laos: Saravan province.
Flowers in October–November in cultivation.
Herbs perennial, evergreen, rhizomatous. Rhizome creeping, subterete, 8–10 mm thick, covered with scales, nodes dense. Roots numerous. Vaginal leaves 5–6, purple-red, 2–6 cm long, enveloping base of petiole, becoming black-brown when dry. Leaves solitary, 1–2 cm apart; petiole stiff upright, 12–30 cm long, 2–3 mm thick, adaxially sulcate; leaf blade usually oblonglanceolate to lanceolate, 28–36 cm long, 4–5 cm wide, dark green, base cuneate, gradually tapered to petiole, inequilateral, margin entire, apex long acuminate. Peduncle erect or declining, purple, 6–9 cm long, with 7–8 bracts, bracts gradually wider from base to top of peduncle, the bract immediately below the perianth broadly ovate, bluish white, 6–7 mm long, 10–12 mm wide, apex acuminate. Flower solitary; perianth slightly urceolate, fleshy, 12–15 mm long, (6) 8-lobed apically; lobes yellow, ovate-triangular, subequal, 6–8 mm long, 5–7 mm wide at base, glabrous, apex rounded and usually explanate; tube 8–10 mm long, 16–20 mm in diam., abaxially yellowish white, adaxially purplish red. Stamens (6) 8, opposite to lobes, inserted in the middle of perianth tube, positioned lower than stigma; filaments ca. 1 mm long; anthers yellow, ovate, ca. 2 mm long and 2 mm wide. Pistil mushroom-shaped, 6–8 mm long; ovary inconspicuous, style delicate, purplish red, cylindrical, 5–7 mm long and ca. 1 mm in diam.; stigma peltate, 6–8 mm in diam., upper surface yellow, flat and shallowly concave occasionally, with (3–) 4 radial, bifurcate, inconspicuous radial lines in center, (3–) 4 lobed at margin, lobes emarginate at apex.
Huang et al. (2018) – Taiwania 63(4): 393-396.