6. 关于植物土遁,生石花的这个现象很神奇,主要原因还是因为缺水了,具体参考一下这段话来自《Wild lithops 》的文字,“The innards of a lithops are well protected from external climatic hazards and whilst usually only a few millimetres of the tops of the plant's leaves pro-trude above the surface of the soil,below ground level the leaves-the body of the lithops-can ex-tend downwards another thirty millimetres.During drought conditions lithops are assumed to retract further into the ground leaving a cavity that may fill with sand,eventually concealing the plants com-pletely.Embedding their bodies deep within the soil may prevent loss of water in lithops(Eller & Ruess,1982).”(生石花属的内部受到良好的保护,免受外部气候危害,同时通常只有几毫米的植物叶片顶部在土壤表面,低于地面水平。 生石花属的主体可以向下延伸30毫米。在干旱条件下,生石花被认为会进一步缩回地面,留下一个充满沙子的洞,最终完全隐藏植物。将他们的身体深埋在土壤中可以防止水分流失(Eller&Ruess,1982)。)