指南草——在中亚细亚盛产一种草,人们称它为“指南草”。这种草的特殊之处是:在阳光照射下,叶子老是从北方指向南方,人们根据叶尖的位置就能辨别方向,这对旅行的人来说简直太方便了!彩色草——人们常见的草是绿色的,可美国洛杉矶植物学院的研究人员培养出了紫色的、浅蓝色的、 Guide grass - rich in Central Asia a grass, people call it “guide grass.” What makes this grass special is that under the sunshine the leaves always point south from the north, and people are able to discern directions based on the position of the tip of the leaves, which is very convenient for traveling people! Color Grass - People Common grass is green, but the researchers at the Los Angeles College of Botany cultivated a purple, light blue,