Overview
Discovered and described in 2020 by botanists studying the imperiled dry spiny forests of southwestern Madagascar, Eulophia pelorica is an astonishing terrestrial orchid. What makes this species an extraordinary evolutionary find is its stable peloria: unlike typical orchids that possess bilateral symmetry (zygomorphy) with a specialized landing lip, this species has evolved radially symmetrical (actinomorphic) blossoms where all three inner petals are identical.
Biology and Physical Characteristics
Arises from a chain of subterranean, thickened pseudobulbs that store water and starches to endure extended droughts. During the brief austral wet season, it produces an erect, unbranched flowering spike bearing 10 to 25 star-like blossoms. The petals and sepals are pale creamy-white to mint-green, marked with delicate brownish-purple longitudinal veins. The absence of a differentiated lip gives the flower an appearance reminiscent of a miniature lily.
Behavior and Ecology
Survives in one of the most arid, extreme environments in Madagascar, shedding its leaves during prolonged dry spells and retreating to dormant subterranean corms. Its actinomorphic flowers represent an evolutionary reversion that facilitates pollination by generalist halictid bees and solitary wasps, which can approach the open, saucer-like flowers from any radial direction rather than needing a specialized landing platform.
Conservation and Human Impact
Assessed as Critically Endangered due to severe degradation of the southern Malagasy spiny forest ecosystem. Pervasive clearcutting for charcoal production, slash-and-burn maize farming (hatsake), and browsing by introduced goats have fragmented over 80 percent of its native habitat, leaving only isolated individuals on inaccessible limestone cliffs.
Interesting Factoid
While peloria is occasionally observed in wild orchids as an accidental individual mutation, Eulophia pelorica represents a rare case where the peloric genetic mutation has become fixed across an entire wild breeding species.
Last updated: October 2026