Fuchsia sanmartina is a species of flowering plant in the family Onagraceae. It is a shrub or climbing plant with firmly membranous leaves and hanging red flowers. The species is native to northern Peru, and was described in 1982.

Taxonomy Fuchsia sanmartina was described by Paul Edward Berry in 1982.

It is part of a species group that includes Fuchsia simplicicaulis, Fuchsia ceracea, and Fuchsia coriacifolia.

Distribution Fuchsia sanmartina is native to the wet tropical biome of northern Peru. The type locality is in the Department of San Martín, Peru. The species has been collected from an elevation of .

It occurs sympatrically with Fuchsia decussata and Fuchsia ferreyrae.

Description Fuchsia sanmartina is a shrub that grows high, or a climber that grows high. The young branches are covered in short hairs.

The leaves are usually in groups of three, or are sometimes arranged oppositely. The leaves are firmly membranous, narrowly elliptic-ovate, long, and wide. The leaf stems are long.

The inflorescence is a raceme with multiple hanging flowers. The flower stems are long. The flowers are bright red. The floral tube is subcylindrical, long, wide at the base, and wide at the rim. The sepals are tapering, long, and wide. The petals are narrowly lanceolate-elliptical, long, and wide.

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