会走路的“树”

• 作 者: 苏醒
• 机 构: 河北省秦皇岛市抚宁区教师发展中心,
• 出 处: 农村青少年科学探究
• 发表日期: 2017年Z1期
• 关键词: 根重 圆球状 卷柏科 还魂草 背腹面 石松亚门 长生草 翠云草 根托 江南卷柏

如果告诉你有一种植物会走路,你会不会认为这是天方夜谭?但这是千真万确的。在我国就生长着这样一种既有趣又奇特的植物,它的名字叫卷柏。每当气候干旱、严重缺水的时候,卷柏就会自己把根从土壤里拔出来,摇身一变,让整个身体蜷缩成一个圆球状,又轻又圆。只要稍微有一点儿风,它就能随风在地面上滚动。一旦滚到水分充足的地方,圆球就会迅速地打开,根重新扎到土壤里,并暂时安居下来。如果它又感到水分不足,呆得不称心

If you tell you a plant will walk, would you think this is a fantasy? But this is true. In our country is growing such a funny and peculiar plant, its name is Selaginella. Whenever the weather is arid and severely waterlogged, Selaginella will pull its roots out of the soil and transform itself into a round ball, light and round. As long as a little bit of wind, it can wind the ground rolling. Once you get to a place with plenty of water, the spheres will open quickly and the roots will re-enter the soil and settle for the time being. If it does not feel enough water, do not enjoy it