The
type specimen were collected near
Santa Rosa, Peru at an altitude of 135 meters.
Peperomia rhombeifolia is a small,
rhizomatous, tufted, epiphytic,
glabrous herb with minute papillae. The
stem is 3 mm thick. The alternate
leaves are crowded, rhombic-lanceolate, measuring 2.5 cm long and 1 cm wide, opaque, and obscurely
5-nerved. The
petiole is 5 mm long. The axillary
spikes turn blackish when dry. ==Taxonomy and naming==