Quang Binh Prov., Minh Hoa Distr., Thuong Hoa Comm., Ban On Vill., Pa Nun Valley, 17°40′22″N, 105°58′22″E, 250-270 m.
Edges or in rather open places of heavily logged primary and secondary evergreen broad-leaved forests on foot and slope of limestone mts. Herb, 0.3-0.4 m tall, terrestrial or in rich in humus hole on vertical cliffs. Opened fruits spiral, fallen down already. Occasionally common.