Robust, bulbous geophyte up to 30cm. Leaves 1 or 2, lanceolate to ovate, usually unblotched. Flowers on long stalks, cylindrical, bright orange to red with darker red or brown markings and green tips; anthers not exserted.

After: Prof. Werner de Lachenal (1736-1800), Swiss botanist and professor of botany and anatomy at the University of Basel; a friend of Carl Linnaeus.