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Plants terrestrial, slender to fairly robust, 0.21-0.87 m high. Leaves 2-5, cauline, nearly erect, lanceolate, 60-250 mm long. Inflorescence dense, 15-60-flowered; bracts prominent, white with green spreading. Flowers white, median sepal and petals lemon-yellow. Sepals: median sepal narrowly ovate-falcate, up to 4 mm long; lateral sepals slightly longer. Petals fused to sepals in basal part, narrowly oblong to obovate. Lip galeate with wide entrance, taller than deep, apical flap prominent; spur saccate, 1.5-4.5 mm long, hairy in mouth. Flowering time Dec., Jan.
Terrestrial herb, up to 0.9 m high. Leaves narrowly lanceolate, erect. Spurs 1.5-4.5 mm long. Lip flap small, 1 mm long. Flowers white or pale green with odd sepal and petals lemon-yellow.
Flowering stem with 5–10 leaves, the largest in the middle, erect, loosely sheathing at base, 10–24 × 2.5–4 cm, ± lanceolate, acute, with prominent longitudinal veins.
Median sepal 5–8 × 1 mm, oblanceolate, obtuse, it and the petals curved back; lateral sepals spreading, slightly longer and about twice as wide, obliquely oblong.
Bracts up to 55 mm long, lanceolate, acute, spreading or with some reflexed, untidy-looking, white towards apex.
Column 3.5–5 mm high; stigma 1.5–2 mm high and wide; rostellum shortly and equally 3-lobed, the mid-lobe bifid.
Sterile shoot 4-leaved; the 2 lower leaves sheath-like; the upper leaves to 25 × 7.5 cm, lanceolate, acute.
Lip 6–8 mm long with upturned apex 2 mm long, very convex, with wide mouth 4–5 mm across.
Sepals and petals ± deflexed, joined to each other in basal half and to lip for 1–2 mm.
Terrestrial herb 30–108 cm high; tubers to 4.5 cm long, ellipsoid to fusiform, woolly.
Inflorescence 5–27 × 2–3 cm, densely many-flowered, the rhachis hairy.
Flowers white, the median sepal and petals sometimes yellow.
Spurs 4–7 mm long, 1.5–2 mm diameter, parallel to ovary.
Petals similar to median sepal but half as wide.
Ovary 6–8 mm long, densely pubescent.
