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Description:
Plants 30–100 mm high. Corm hemispherical, 7–20 mm diam., obliquely flattened on one side and convex on the other, with wide, crescent- or fan-shaped, sometimes almost vertical basal ridge as wide as corm or wider, tunics woody, split into parallel fibrils irregularly grouped along ridge. Stem subterranean. Leaves 4 to 8, all basal, sometimes flexuous or twisted, condupliacte and bifacial almost to tip with adaxial groove open, narrowly 4-grooved beneath, 0.5–1.0 mm diam., glabrous or ciliolate to cilate or pilose along rib margins. Peduncles 1 to 4, to 80 mm long, subterete, curved or reflexed to spirally twisted in fruit; outer and inner bracts largely membranous or submembranous, greenish apically or with green or reddish veins, white or brownish to brown-stippled, 10–25 mm long, widely striate (3 or 4 veins/mm). Flowers pale to golden-yellow with darker cup sometimes extending onto base of tepals, unmarked or with tridentate or spade-shaped black blotch in throat, sometimes reduced to black veins, outer tepals sometimes greenish brown on reverse, sweetly scented; perianth tube funnel-shaped, 3–10 mm long; tepals oblanceolate to elliptic, 10–40 × 2–12 mm. Filaments 3–10 mm long, pilose basally, yellow; anthers 3–10 mm long, yellow. Style dividing shortly below or beyond anther apices, branches 2–6 mm long, divided halfway. Capsules subglobose to ellipsoid, 6–10 mm long. Flowering time: June–Sept.
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