THE DUAL POLYCLAVE: AN AID TO MORE EFFICIENT IDENTIFICATION
Roger William Payne, R. R. Lamacraft, R.P. White · New Phytologist · 1981
SUMMARY Polyclaves have advantages over conventional aids to identification in that the user is free to examine any convenient character. However the polyclave gives no guidance about the best character to examine next during an identification. This deficiency can be overcome by using a dual polyclave which indicates how each character separates the taxa not eliminated by characters already observed.