Disperis tysonii Bolus

Plants mostly 200-400 mm; leaves 4 (-5), cauline, alternate, ovate to lanceolate, acute, usually 15-30 x 5-8 mm. Inflorescences secund, (1-) 5-20-flowered; bracts ovate to lanceolate, acute, 6-22 (-30) x 3-10. Flowers: sepals pink, petals magenta, spotted with green within, lip green; ovary cylindrical, 10 mm long; scent sweet. Median sepal ovate, 5-6 x 3-4 mm, with a sac-like hood 4-5 (-7) mm deep; lateral sepals obovate, acuminate, 6-8 x 2.5-3 mm, spurs to 0.5 mm deep. Petals adnate to the median sepal, curved, falcate, clawed, ovate, acute, 4-6 x 2-2.5 mm. Lip basally fused to the gynostemium; claw 3 mm long; blade erect, blocking the mouth of the median sepal, broadly ovate to triangular, apex acute and adhering to the tips of the petals and median sepal, verrucose, 4 x 2 mm; appendage horizontal, linear, pubescent, 5 mm long. Anther horizontal; stigma dorsal, lobes diverging; rostellum arms bulbous at the base, incurled, 0.75 mm long.