TABLE 1. Differences between Gastrodia exianlingensis and G in Gastrodia exianlingensis (Gastrodieae, Epidendroideae), a new species of Orchidaceae from Hainan, China

TABLE 1. Differences between Gastrodia exianlingensis and G. longitubularis. Gastrodia exianlingensisG. longitubularisRhizomeup to 1.2 cm cm in diameter, without rootsup to 0.6 cm in diameter, with rootsInflorescenceup to 17 cm long, 0.2–0.4 cm in diameter, densely 5–9-floweredup to 25 cm long, 0.1–0.2 cm in diameter, laxly 2–6- floweredPerianth tube1.8–2.5 cm, opening1.6–1.8 cm, hardly openingFree part of sepalsdorsal sepal obtuse, smaller than lateral sepalsdorsal sepal similar to lateral sepalsFree part of petalstriangular-cordateelliptical, ovate or sub-rotundLip10 × 5 cm, base claw ca. 2 cm long6 × 4–5 cm, base claw ca. 1 cm longBasal callilong ellipsoidalsub-globoseRidges on disc95Columnshorter than lip, 8–9 mm long, no broadening in the middle, stelidia acute triangular, straight; column foot ca. 1.5 mmlonger than lip, 6–7 mm long, median part slightly broadening, stelidia acute triangular, slightly curved; column foot ca. 0.5 mm