Rossioglossum williamsianum is an epiphytic orchid from the genus Rossioglossum.
Plants bloom from spring to summer with several 15 cm flowers.
Plants are found in the dense forest trees in Mexico, Guatemala and Honduras at elevations of 0 to 1000 meters.
Grow plants in cool to intermediate temperatures in partial shade to bright light. Water plant when mix drys. During the winter give plants a slight dryout between waterings. Water approximately once a week. Pot with medium fir bark.
Common name: William's Rossioglossum
- Odontoglossum grande var. williamsianum Rchb.f 1886
- Odontoglossum williamsianum Rchb. f. 1881