Plants with chlorophyll, semi-mycotrophic, flowering when 4.5-20 cm tall. Stems green, slender. Basal rosette leaves few, lanceolate, 0.3-1.2 cm × 1-3 mm. Cauline leaves linear, 5-18 × ca. 2 mm. Inflorescences 1-3(or 4)-flowered; bracts lanceolate, 5-6 mm. Flowers pedicellate to subsessile, purple or yellow, 3-8 mm. Perianth tube 4-6.5 mm; wings conspicuous, 1-3 mm wide; outer tepals broadly ovate, 1-3 mm, margin single or double and shallow; inner tepals spatulate, 0.5-1.2 mm, margin single. Stamens sessile; connectives with 2 apical crests and sometimes a pendent basal spur. Ovary ellipsoid to obovoid, 2.5-7 mm. Capsule obovoid. Seeds ellipsoid. Fl. Jun-Oct, fr. Jul-Jan. 2n = ca. 32.
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