What is "calyptrochilum"

Calyptrochilum is a genus of flowering plants from the orchid family Orchidaceae native to tropical Africa, with one species extending into Brazil.

Two species are currently recognized (May 2014):

• Calyptrochilum christyanum (Rchb.f.) Summerh. - Bahia region of Brazil; Africa from Senegal to Ethiopia to Zimbabwe and Mozambique
• Calyptrochilum emarginatum (Afzel. ex Sw.) Schltr. - Africa from Ivory Coast to Central African Republic south to Angola