特殊用法bostrychoid dichotomy1.螺状二歧分枝式cincinnal dichotomy1.蝎尾状二歧式cruciate dichotomy1.十字形二歧分枝式equal dichotomy1.等二歧式false dichotomy1.假二叉分枝式, 假二歧式flabellate dichotomy1.扇形二歧分枝式helicoid dichotomy1.螺形二歧式scorpioid dichotomy1.蝎尾状二歧分枝式sympodial dichotomy1.合轴二歧式