Published July 17, 2025
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TABLE 2 in Gastrodia motuoensis (Orchidaceae, Epidendroideae), a new species of mycoheterotrophic plant from Xizang, China, based on morphological and molecular evidence
Authors/Creators
- 1. State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China & University of Chinese Academy of Sciences, Beijing, 100049, China & China National Botanical Garden, Beijing, 100093, China
- 2. State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China & China National Botanical Garden, Beijing, 100093, China
Description
TABLE 2. Morphological comparison among Gastrodia motuoensis and its allies.
| Character | G. motuoensis sp. nov. | G. theana | G. sikkimensis | G. albida | G. nipponica |
|---|---|---|---|---|---|
| Perianth tube | 12-13 mm long, half opening, brownish to brown, margin slightly dentate, outer surface sparsely verrucose, more prominently so along midribs of lateral sepals | Approximately 12 mm long, hardly opening, whitish, margin entire, outer surface verrucose, distinctly striated | Approximately 10 mm long, hardly opening, brownish, margin entire, sparsely verrucose towards apex, distinctly striated | Approximately 12 mm long, not widely opening, whitish to brownish, margin entire, outer surface distinctly verrucose | 18-24 mm long, half opening, dark brown, margin entire, outer surface verrucose |
| Sepals | Subsimilar, free parts broadly triangular, lateral ones fused for 1/2-2/3 of their length | Subsimilar, free parts incurved at tips, lateral ones fused for 1/4-1/3 of their length | Dorsal sepal longer than lateral ones, lateral ones fused for>4/5 of their length | Subsimilar, free parts incurved at tips, lateral ones fused for 1/6-1/5 of their length | Subsimilar, free parts ovate-triangular, retuse or obtuse at apex, lateral ones fused for ca. 2/3 of their length |
| Petals | Fused with sepals for 2/3 of their length, free parts broadly triangular, slightly smaller than sepals | Fused with sepals for>9/10 of their length; free parts narrowly triangular, much smaller than sepals | Fused with sepals for>4/5 of their length, free parts triangular-ovate, much smaller than sepals | Fused with sepals for>4/5 of their length, free parts ovate-oblong, shorter than and ca. 1/3 the width of sepals | Fused with sepals for ca. 3/4 of their length, free parts ovate to ellipse, smaller than sepals |
| Lip | Brownish to whitish, longer than column, disc non-nerved, with a pair of parallel longitudinal lamellae stretching from base to middle part, apex shortly caudate | Green to salmon-red, shorter than column, disc with thick short keel-like median callus near apex, apex acute or acuminate | Brown to green, shorter than column, disc 5-7 nerved, with two ridges arising from base to epichile and divergent at apex, apex acute | Whitish to reddish, shorter than column, disc thickened and 2-ridged at middle, apex acute to subobtuse | Whitish to reddish, sebequal in length to column, disc 4-6 ridged, margin slightly undulate, apex ligulate |
| Column | Mostly whitish, lateral wings bent inwards, up to 2 mm wide each, with rounded tips parallel to anther, stigma positioned at middle of column | White, short, lateral wings narrow, with acuminate tips inferior to anther, stigma positioned near base of column | Whitish, lateral wings bent inwards, ca. 1 mm wide, with acuminate tips superior to anther, stigma positioned at base of column | White, lateral wings narrow, parallel to column, with acuminate tips superior to anther, stigma, stigma positioned near base of column | White 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 |
Notes
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
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