桫椤是两亿年前的一种高大木本树蕨。在侏罗纪、白垩纪时期曾在地球上盛极一时,与大型爬行类动物恐龙同生共荣。第四纪冰川期后,庞然大物恐龙等古生物在地球上绝迹,原本在世界各地随处可见的桫椤也濒临灭绝,仅有少数在某种特定的环境中侥幸残存、繁衍了下来,成为当今世界十分珍贵的冰川前期古生代植物,被誉为“蕨类植物之王”、科学研究 Emu is a tall woody tree fern 200 million years ago. During the Jurassic and Cretaceous times, it had flourished on the earth and co-existed with the large reptile dinosaur. After the Quaternary glaciation, monsters such as the monster dinosaurs disappeared from the earth. The monstrosities that were originally found everywhere in the world were also on the verge of extinction. Only a few survived and multiplied in some particular circumstances, making them extremely precious in today’s world Precambrian Paleozoic plants, known as “king of ferns ”, scientific research