Octomeria pacii is a species of flowering plant in the family Orchidaceae. It is native to Ecuador's Zamora-Chinchipe Province, and was described in 2021.
Octomeria pacii is an epiphyte with white and magenta flowers. Unlike most species of Octomeria, it may be self-pollinating.
Taxonomy Octomeria pacii was described in 2021, by Leisberth Vélez-Abarca, Marco M. Jiménez, and Luis E. Baquero. The holotype was collected from the Cordillera del Cóndor, at an elevation of .
Octomeria pacii was described alongside Octomeria panguiensis.
Distribution Octomeria pacii is native to the wet tropical biome of Ecuador. It grows in the montane forests of the Cordillera del Cóndor, under the shade of small trees. The species grows at elevations of around .
Octomeria pacii has only been recorded from Ecuador's Zamora-Chinchipe Province.
Description Octomeria pacii is an epiphyte with slender roots. It grows up to high. The leaves are leathery, narrowly elliptical, long, and wide.
The inflorescence produces a single flower. The sepals are translucent, white, and suffused with magenta. The dorsal sepal has five veins, and measures long by wide. The lateral sepals have five veins, are long, and wide. The petals have three veins, and are white, suffused with magenta. The petals are long, and wide. The lip has three lobes, is white and magenta, around long, and around wide.
The column is red to purple in colour, and long. Unlike most other Octomeria, O. pacii may be self-pollinating, and has only a vestigial rostellum. The rostellum prevents self-pollination in most Octomeria.
Octomeria pacii is similar to Octomeria deceptrix, though the species differ in the details of their leaves and flowers.
Etymology Octomeria pacii is named after Patrick Paci, a "passionate lover of the forests and slipper orchids of Ecuador", who supported the research.
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