ABSTRACT:

Ulearum donburnsii, a new species of Araceae, is described from the Amazon lowlands of Ecuador along the RIO Morona in the Province of Morona-Santiago. The species is only the second species in the genus Ulearum. The species differs from the only other species, Ulearum sagittatum Engl., by having filiform staminodes on the spadix on either side of the staminate portion of the spadix, in contrast to the depressed globose or short, cylindric staminodes present in Ulearum sagittatum.