The sympodial stems of E. parvilabre are so thick that Reichenbachdescribed them as pseudobulbs, although Dodson & Bennett 1969 did not follow suit, noting only that the stems are unifoliate. The oblong suboblique emarginate leathery leaves are longer than the stems. The densely floweredracemoseinflorescence erupts from a double or triplespathe at the apex of the pseudobulb, similar to the subgenus E. subg. Spathium. The flowerbracts are small and acute. The flowers are a little more than 1 cm across, with green sepals and petals, and a whitelip with purple spots. The sepals are oblong-obtuse, 1 cm long, and 3–4 mm wide; the falcate revolute lateral sepals are slightly shorter and wider than the plicate dorsalsepal. The linear petals are much narrower than the sepals. The deeply trilobate lip is adnate to the column to its apex. The lateral lobes of the lip are falcate and very acute. The very narrow medial lobe of the lip is cuneate and trilobed at its apex.