there were no wild animals here , he decided , by his feel for the jungle , or , at least , none that would bother him in a lean-to , so , mostly , he gathered fernsdo the easy stuff firstthen , he looked for a bamboo grove , but , finding none , dragged some fallen branches over to a large treewas it a banyan ? uh , no , nothing so poeticjust a large tropical tree with black bark and purple leaves !