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Herbs, perennial [or annual], terrestrial [epilithic or epiphytic], rhizomatous, without rhizoids, stolons, or traps. Roots fibrous. Leaves in a basal rosette, simple, petiolate or sessile, soft and fleshy; leaf blade adaxially usually with numerous viscid glands, veins pinnate, margin entire and usually involute. Inflorescences with a solitary flower, rarely a 2-or 3-flowered raceme, without scales, bracts, or bracteoles. Calyx 2-lipped; lower lip 2-lobed; upper lip 3-lobed. Corolla open at throat, palate of lower lip not raised; lower lip larger than upper lip, spurred, 3-lobed, middle lobe larger; upper lip 2-lobed. Capsule loculicidal, opening by 2 valves. Seeds many per capsule.
Cal 5-lobed, somewhat 2-lipped; cor 2-lipped, 5-lobed, the lower lip lacking a palate, longer than the upper, and prolonged into a conspicuous basal spur; acaulescent perennials with a rosette of entire basal lvs and one or more, 1-fld bractless scapes. 35, mainly temp. and boreal N. Hemisphere, and Andes.
