Trigonidium egertonianum is an orchid found in Central and South America.
The specific epithet "egertonianum" is named for Sir Egerton.
Trigonidium egertonianum has densely clustered pseudobulbs, ovoid in shape with two leaves. The orchid's inflorescence arises on mature growths, ranging from 25–45 cm (9.8–17.7 in) in length. Its flowers are 3–4 cm (1.2–1.6 in) long and bell shaped. The sepals, petals, and lip are yellow-green to pinkish brown, with brown veins and markings. The species is epiphytic and grows on large, wet branches up to 900 m (3,000 ft) in altitude.
The species produces extrafloral nectar.
^ John Lindley (1838). Edwards's Botanical Register. Vol. 11. James Ridgway and Sons, Piccadilly. pp. 73–74.
^ I. F. La Croix (2008). The New Encyclopedia of Orchids: 1500 Species in Cultivation (illustrated ed.). Timber Press. p. 478. ISBN 9780881928761.
^ Nelis A. Van Der Cingel (2001). An Atlas of Orchid Pollination: European Orchids (illustrated ed.). CRC Press. p. 97. ISBN 9789054104865.