RATTLE BEAK ORCHID Lyperanthus serratus Youngs Siding, 19 September 1933 (ACC 5448A/41) Lyperanthus serratus Lindl. RATTLE BEAK ORCHID Tuberous, perennial herb; 0.25-0.5m high; fl. green, brown, yellow, Sep-Oct. Sand, loam, sandy clay. Distribution: SW: AW, ESP, JF, SWA, WAR. (G. Paczkowska & A. R. Chapman, pp. 86.)