The type specimen where collected in
Mocoa, Colombia.
Peperomia mocoana is a spreading, creeping, nearly
hairless herb with
stems 2–3 mm thick, rooting at the nodes, hairless, with thin, narrow, membranous longitudinal ridges, and internodes about long. The alternate
leaves are suborbicular, in diameter, with rounded, obtuse apex and rounded base that is abruptly short-acute at the petiole. They are hairless above, minutely finely hairy along the nerves beneath, palmately 7-nerved or 9-nerved with the lowermost pair of nerves slender and obscure. The
midrib and lateral nerves are slenderly branched upward, with thin membranous ridges beneath that become wider and narrowly wing-like toward the base of the blade and continue down the petiole. The leaves dry thin and membranous. The
petiole is long, very minutely finely hairy, clasping and decurrent. The leaf-opposed
spikes near the apex of the short ascending end of the stem are young at the time of description, 1.5 mm thick by long, on slender
peduncles 5 cm long that are obscurely minutely finely hairy. The
bracts are round-peltate with yellow glandular dots. The
ovary is top-shaped with apical
stigma.
Fruit was not mature. The combination of its spreading habit with prominently ridged stems, petioles, and nerves—the ridges being thin, narrow, membranous, and wing-like toward the leaf base and continuing down the petiole—together with the larger, scarcely cordate suborbicular leaves (4–6.5 cm diameter), and longer peduncles (5 cm) characterize this species. It resembles
P. Grisarii but differs in these prominently ridged features and leaf shape ==Taxonomy and naming==