Psittacanthus robustus is a species of Neotropical mistletoe in the family Loranthaceae, which is found in Brazil, Colombia, Guyana, and Venezuela.

[3] Inflorescences are both terminal and axillary, consisting of umbels of yellow to orange triads (flowers in groups of three).

[3] The fruit is light green colored when immature but when ripe the colour changes to black, and looks somewhat like an olive.

[3] Three species of birds have been found eating and excreting the seeds.

The most common isTersina viridis viridis (swallow tanager), but also the cinnamon-tanager, Schystoclamys ruficapillus ruficapillus, and the sayaca-tanager, Thraupis sayaca sayaca.