Epidendrum mancum is an epiphytic orchid that grows in the tropical low elfin cloud forests of Ecuador and Amazonas, Peru,[1] at altitudes of 2–3 km .

E. mancum exhibits a sympodial growth habit, with flattened stems nearly covered by the basal sheaths of the three to four oblong retuse leaves, and a terminal racemose inflorescence which erupts from a large spathe, as is typical of the subgenus E. subg.

[2] The small, fleshy, non-resupinate flowers range in color from green to yellowish-green or orange, frequently with red-brown markings which may nearly cover the perianth segments.

The petals are spatulate with very obtuse and concave apices.

From peduncle to column apex is approximately 1 cm; the lip protrudes an additional 2 mm.