The
type specimen was collected in
Guápiles, Costa Rica at an altitude of 300-500 meters.
Peperomia guapilesiana is a
rhizomatous, erect herb. The
stem is moderately stout at 5 millimeters thick and covered with yellowish woolly hairs. The
leaves are alternate, elliptic, rather blunt at both ends, and large, ranging from 3.5 by 5 centimeters to 6 by 12 centimeters. They are dull, granular, paler beneath and covered with woolly hairs, especially on the
nerves. The leaves are pinnately veined from below the upper third, with branches of the midrib numbering about 5 pairs by 2. The
petiole is very woolly-haired and short at 2 centimeters long. The
spikes are loosely arranged in whorls at the nodes of a somewhat compound, very woolly-haired panicle about 15 centimeters long on a stalk of equal length. The spikes themselves are rather small at scarcely 2 by 30 to 35 millimeters, and blunt. The
peduncle is short at 5 millimeters and woolly-haired. The floral
bracts are rounded and shield-shaped (peltate). The
berries are elongate-obovoid, pale brown, without a beak. The
stigma is oblique. ==Taxonomy and naming==