The
type specimen were collected near
Tarapoto, Peru at an altitude of 360-900 meters.
Peperomia exilamenta is a rather large, epiphytic or terrestrial herb. When dry, the
stem is 3–4 mm thick, deeply angled, and very sparsely covered with soft, minute bristles. The
leaves are typically in whorls of 3. They are broadly lanceolate to elliptic-lanceolate, bluntly acuminate, with an acute base, measuring 5–6 cm long and 2–2.5 cm wide. They are
3-nerved, with the nerves impressed above and prominent beneath. The leaves are
glabrous, with impressed-punctulate dots on the upper surface, a revolute margin, and are very rigid. The
petiole is 5 mm long and puberulous. The
spikes are terminal and from the
upper axils, 120 mm long and 1 mm thick, borne on a
peduncle 10–25 mm long. The
berries are ovoid, pointed, and bear a pseudocupula, with an apical
stigma. ==Taxonomy and naming==