Antrophyon de Bory, Langue de boeuf, Langue de vache

Antrophyopsis boryana, commonly known as Antrophyon de Bory, Langue de boeuf, or Langue de vache, is a critically endangered fern species endemic to the Mascarene Islands in the Indian Ocean. This distinctive pteridaceous fern displays large, leathery fronds with a characteristic tongue-like appearance that inspired its French common names meaning 'ox tongue' and 'cow tongue.' The species produces robust, evergreen fronds that can reach considerable size, with a thick, succulent texture adapted to its specialized habitat requirements. Antrophyopsis boryana inhabits the remaining fragments of native montane forest ecosystems, typically growing as an epiphyte on tree trunks and branches in humid, shaded conditions at elevations between 400-800 meters.

The species was historically distributed across Mauritius and Réunion, but its range has contracted dramatically due to extensive deforestation and habitat conversion. Currently classified as Critically Endangered by the IUCN, this ancient fern lineage represents one of the most threatened pteridophytes in the Mascarene archipelago. The species exhibits slow growth rates and specific microhabitat requirements that make it particularly vulnerable to environmental changes.

However, recent botanical surveys have rediscovered small populations in protected forest reserves, and specialized propagation techniques developed by regional botanical gardens offer hope for ex-situ conservation efforts. Conservation biologists are working with local authorities to establish habitat corridors connecting remaining forest fragments, which could benefit this species alongside other endemic Mascarene flora. The discovery of previously unknown populations in remote ravines demonstrates the importance of continued field surveys in these biodiverse island ecosystems.

Antrophyopsis boryana occupies humid montane forest environments in the Mascarene Islands, growing primarily as an epiphyte on the trunks and major branches of native trees within the forest canopy. The species requires consistently moist conditions with filtered sunlight and stable temperatures, typically found in well-preserved forest fragments between 400-800 meters elevation.