任豆树(Sohima allichii),又称砍头树,是石山速生树种,它具有多种用途,材质较坚,纹理通直细密,色淡红,易加工,为石山区建筑栋梁、桁条、楼板和木器制作良材;枝材热值高,为产区优良薪炭材之一;叶富含蛋白质,供牲畜饲料,同时含有一定的氮素,可作绿肥和农家肥。由于它能在森林植被破坏后的石山环境条件下生长迅速,提早成林,现在,已开始被人们作为石山绿化优良树种来研究。 Sohima allichii, also known as beheading tree, is a fast-growing tree species of rocky mountain. It has many purposes, its material is relatively strong, the texture is straight and dense, its color is pink and easy to process, Floor and wood production of good wood; high heat value of the branches, producing areas for one of good firewood; leaf rich in protein for livestock feed, at the same time contains a certain amount of nitrogen can be used for green manure and farmyard manure. Because of its rapid growth under the rocky mountain environment after the destruction of the forest vegetation, it has been started to be considered as an excellent tree species of rocky hillsides nowadays.