TABLE 2. Morphological comparison among Gastrodia motuoensis and its allies. CharacterG. motuoensis sp. nov.G. theanaG. sikkimensisG. albidaG. nipponicaPerianth tube12-13 mm long, half opening, brownish to brown, margin slightly dentate, outer surface sparsely verrucose, more prominently so along midribs of lateral sepalsApproximately 12 mm long, hardly opening, whitish, margin entire, outer surface verrucose, distinctly striatedApproximately 10 mm long, hardly opening, brownish, margin entire, sparsely verrucose towards apex, distinctly striatedApproximately 12 mm long, not widely opening, whitish to brownish, margin entire, outer surface distinctly verrucose18-24 mm long, half opening, dark brown, margin entire, outer surface verrucoseSepalsSubsimilar, free parts broadly triangular, lateral ones fused for 1/2-2/3 of their lengthSubsimilar, free parts incurved at tips, lateral ones fused for 1/4-1/3 of their lengthDorsal sepal longer than lateral ones, lateral ones fused for>4/5 of their lengthSubsimilar, free parts incurved at tips, lateral ones fused for 1/6-1/5 of their lengthSubsimilar, free parts ovate-triangular, retuse or obtuse at apex, lateral ones fused for ca. 2/3 of their lengthPetalsFused with sepals for 2/3 of their length, free parts broadly triangular, slightly smaller than sepalsFused with sepals for>9/10 of their length; free parts narrowly triangular, much smaller than sepalsFused with sepals for>4/5 of their length, free parts triangular-ovate, much smaller than sepalsFused with sepals for>4/5 of their length, free parts ovate-oblong, shorter than and ca. 1/3 the width of sepalsFused with sepals for ca. 3/4 of their length, free parts ovate to ellipse, smaller than sepalsLipBrownish to whitish, longer than column, disc non-nerved, with a pair of parallel longitudinal lamellae stretching from base to middle part, apex shortly caudateGreen to salmon-red, shorter than column, disc with thick short keel-like median callus near apex, apex acute or acuminateBrown to green, shorter than column, disc 5-7 nerved, with two ridges arising from base to epichile and divergent at apex, apex acuteWhitish to reddish, shorter than column, disc thickened and 2-ridged at middle, apex acute to subobtuseWhitish to reddish, sebequal in length to column, disc 4-6 ridged, margin slightly undulate, apex ligulateColumnMostly whitish, lateral wings bent inwards, up to 2 mm wide each, with rounded tips parallel to anther, stigma positioned at middle of columnWhite, short, lateral wings narrow, with acuminate tips inferior to anther, stigma positioned near base of columnWhitish, lateral wings bent inwards, ca. 1 mm wide, with acuminate tips superior to anther, stigma positioned at base of columnWhite, lateral wings narrow, parallel to column, with acuminate tips superior to anther, stigma, stigma positioned near base of columnWhite to reddish brown, lateral wings narrow, parallel to column, up to 1 mm wide each, with acute tips parallel to anther, stigma positioned at base of column

Published as part of Wang, Hanchen & Jin, Xiaohua, 2025, Gastrodia motuoensis (Orchidaceae, Epidendroideae), a new species of mycoheterotrophic plant from Xizang, China, based on morphological and molecular evidence, pp. 286 in Phytotaxa 710 (3) on page 286, DOI: 10.11646/phytotaxa.710.3.5, http://zenodo.org/record/16715130