Peperomia pseudoalpina is a species of epiphyte in the genus Peperomia that is endemic in Costa Rica. It grows on wet tropical biomes. Its conservation status is Threatened.
Description The type specimen was collected in San Ramón, Costa Rica at an altitude of 1100-1200 meters .
Peperomia pseudoalpina is an essentially hairless, creeping then ascending mountain herb. The stem is rather slender at 2 millimeters thick and roots from the lower nodes. The leaves are alternate, either elliptic or elliptic-obovate, with a slightly notched tip at the somewhat contracted apex and an acute or somewhat wedge-shaped base. They are rather small at 1.5 to 3 by 3 to 4.5 centimeters, sometimes exceeding 4 by 6 centimeters, and dry to a dull, somewhat leathery texture. The leaves are subpinnately nerved from below the middle, with branches of the midrib numbering 2 or 3 pairs by 2. The petiole is about 1 centimeter long. The spikes are terminal, numbering 1 to 3 on a slender, bracted stalk scarcely 2 centimeters long. The spikes are small at scarcely 2 by 30 millimeters, with densely clustered flowers. The peduncle is about 1 centimeter long. The floral bracts are round and shield-shaped (peltate). The berries are ovoid with an oblique beak. The stigma is positioned at the front at the base of the beak.
Taxonomy and naming It was described in 1929 by William Trelease in . The epithet pseudoalpina comes from the Greek pseudo- meaning "false" and the Latin alpinus meaning "alpine" or "of high mountains," referring to its resemblance to alpine species despite growing at lower elevations.
Distribution and habitat It is endemic in Costa Rica. It grows as an epiphyte and is a herb. It grows on wet tropical biomes.
Conservation This species is assessed as Threatened.
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