如果说人类有许多习俗怪异的民族,那么仙人掌类就是植物中最为奇特的物种。 遥想最初,仙人掌也像其它植物一样,有细长的茎、柔嫩的叶,也会在微风吹来的时候,婀娜婆娑。 由于长期生长在干旱缺水、强光酷热的荒漠地带,它们的叶片逐渐失去蒸腾水分的功能,开始萎缩,最终退化成尖锐的刺毛,就像人类那根退化的尾巴,终于变成一个小小的骨节。而那细长的枝干,则成为粗壮的茎,或浑圆的球,能贮 If there are many weird people in the world, then the cacti is the most exotic plant species. At first, the cactus, like other plants, has slender stems and tender leaves, and will be graceful when the breeze blows. As long-term growth in the arid, watery, bright deserts, their leaves gradually lose the function of transpiration, begin to shrink and eventually degenerate into sharp bristles, just like the degraded tail of human beings finally becomes a small Small joints. And that slender branches, then become stout stem, or rounded ball, can store