The
type specimen were collected near
Mount Tungurahua, Ecuador.
Peperomia pilicaulis has a
stem and branches rather long-pilose, prostrate below and rooting at the nodes, 1 mm thick. The
leaves are alternate with short
petioles; the upper petioles 3 mm long; the blade is elliptic, acute at the base, obtuse at the apex, rigid and opaque when dry, shortly pilose above, glabrous beneath,
3-nerved; the upper leaves up to 17 mm long and 7 mm wide; subsequent leaves are elliptic, obtuse at both base and apex, 10 mm long and 7 mm wide; the lower leaves are round and smaller, all pilose on both sides. The
peduncles are terminal, glabrous, 6 mm long, nearly twice the petioles. The
spikes are glabrous, flowering spikes nearly four times longer than the leaf blade, 4 cm long and 1 mm thick. The
bract has a round pelt, pedicellate at the center, slightly less than 0.5 mm in diameter. The
anthers are rounded, nearly equaling the filament. The
ovary is emergent, ovate, bearing a
stigma below the obtuse apex; the stigma is fleshy and glabrous. ==Taxonomy and naming==