Corybas vitreus

Detailed description

Terrestrial herbs, 14–30 mm tall at flowering. Leaf distinctly petiolate, petiole 3.3–24.7 mm long; lamina cordiform, 3.3–14.1 × 7.8–19.6 mm; margin entire; apex mucronate with mucro 0.2–2.8 mm long. Flower solitary, held erect on a peduncle 0.7–8.1 mm long; floral bract triangular to widely deltoid when flattened, 1.8–6.8 × 1.3–3.2 mm; dorsal sepal pale green and less often with a few maroon streaks, concave to cucullate, arching over the labellum, narrow at the base and widely spathulate towards the tip, apex retuse to emarginated; lateral sepals linear-filiform, whitish to pale maroon, 12.0–26.7 mm long; petals similar to the lateral sepals but longer, 21.3–56.5 mm long; labellum lamina mostly translucent, less often with a few streaks of maroon, covered with short trichomes, auriculate at base, aperture 1.2–2.6 mm in diameter; lamina deflexed, c. 7 mm wide, with a central groove formed by the inwards folding of the lamina, extending downwards half way the labellum and sunken pit formed at the point where the lamina bends; lateral margin of the labellum incurving, entire, with a non-isometric dark maroon to purple band, lower margin translucent, straight and erose. Ovary 4.5–8.4 mm long. Column 1.8 mm long, straight, round wings flanking the stigma. Senescent flowers with apex of the dorsal sepal pressing against the labellum blocking access to the column.