船尾梯 poop ladder

头尾梯度 cephalo-caudal gradient

船尾舷梯 Mediterranean gangway

船尾楼梯 quarter ladder

细尾楼梯草 Elatostema tenuicaudatum

梯尾夜鹰 Ladder-tailed Nightjar

梯形船尾 coffin stern

拟细尾楼梯草 Elatostema tenuicaudatoides

直尾楼梯草 Elatostema recticaudatum

梯形尾翼 trapezoid tail