Name:

Aspidistra xuansonensis Vislobokov – Phytotaxa 173(3): 227. (2014).

Subtaxa:

Aspidistra xuansonensis Vislobokov var. xuansonensis Vislobokov

Aspidistra xuansonensis Vislobokov var. violiflora Vislobokov  – Phytotaxa 173(3): 229. (2014).

Holotype:

 

Vietnam, Phu Tho province, Thanh Son district, Xuan Son National Park, 21° 7.988' N, 104° 56.579' E, alt. 355 m, forest, 2 Nov 2013, N.A. Vislobokov 13092 (MW0591739).

Specimens:

MW0591740; MW0591741; MW0591742; MW0735084; MW0735085; MW0735086; MW0735087.

Distribution:

Vietnam, Phu Tho province (Xuan Son National Park). 

Phenology:

Flowers in October–November in nature.

Description

from 

protologue:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Herbaceous perennial rhizomatous evergreen plant. Rhizome creeping, with very short internodes, epigeous, Ø 7.2–11.2 [8.6] mm, with prop roots. Roots grey, Ø 1.9–4.2 [2.8] mm, with multilayered velamen and dense hairs persistent up to root base, endoderm two-layered, pericycle of cells with lignified walls. Rhizomes with regularly repeating units, each comprising 7–12 distichously arranged cataphylls followed by a foliage leaf. Cataphylls greenish to reddish-brown, oblong, 3.1–18.5 [8.2] cm long, 14–18 [16] mm wide. Foliage leaves distinctly divided into petiole and lamina. Petiole dark to light green with pale green dots, adaxially sulcate, 18.5–67 [35.8] cm long, Ø 2–4.2 [2.9] mm. Lamina light green with pale green dots, oblong, basally somewhat unequally cuneate and distally acuminate, 19–46.5 [28.2] cm long, 5–9.8 [7.5] cm wide, with 3–5 secondary veins at both sides of the midvein. The midvein and the secondary veins somewhat prominent at lower surface. Peduncle (specialized reproductive shoot) white to pale green or purple spotted, 1–3.8 [1.8] cm long, Ø 1,4–2 [1.8] mm, with 3–7 widely ovate, acuminate, 5–12 [9.6] mm long, 4.5–10 [8.5] mm wide distichously arranged scale leaves. Flower solitary at the end of a peduncle. Perianth widely tubular to campanulate, 6.5–19.2 [13.4] mm long, Ø 11.8–23.1 [17.4] mm; tube white outside, white or partly purple inside (perianth color does not change during anthesis), widened at the base, 5.3–10 [8.3] mm long, Ø 5.8–9.9 [7.9] mm; lobes 6 (rarely 4, 5, 7), greenish white or purple spotted to completely purple at both sides, widely ovate, obtuse, with extended margins overlying to adjoining in anthetic flowers, 4.6–8 [6.2] mm long, 4.2–9 [6.8] mm wide, lobes with 3-5 shallow longitudinal grooves. Stamens 6 (rarely 4, 5, 7 – in the same number as perianth lobes), inserted at the lower part of the perianth tube, at the radii of tepals; anthers sessile, 2.5–3.4 [3] mm long, 1.3–2.0 [1.7] mm wide, introrse. Pistil suddenly obconic to nearly umbrella-shaped, 5–8 [6.7] mm long. Style white to pale green or purple, cylindrical, 2.1–3 [2.5] mm long, Ø 1.5 mm. Stigma white at the upper side, white or purple at lower and lateral sides, relatively massive, obconic, papillose at the upper surface, somewhat concave, Ø 4–8.6 [6.2] mm, with 2-3-4 radial, bifurcate lines in central part, 4-6-8-lobed at the margin, lobes twice as many as ovary locules, sometimes lower because of low bifurcation rate. Ovary inconspicuous, superior, 3-locular, rarely 2-locular in flowers with 6 tepals (2-locular in flowers with 4 or 5 tepals, 4-locular in a flower with 7 tepals). Fruits grayish black (young fruits green), subspherical, 6.2–9.5 [7.6] mm long, Ø 6.1–10.2 [8.3] mm, with short conical protuberances. A carpophore is absent. Fruiting peduncles 1.2–6.4 [3.9] cm long, Ø 1.1–2.3 [1.8] mm, with mostly disintegrated and/or abscised scale leaves.

Sourses:

Vislobokov N.A. (2005) Phytotaxa 173(3): 226–234.

Gallery: