丝兰(Yucca gloriosa L.)又名凤尾兰,厚叶丝兰,属百合科丝兰属常绿木本,是园林绿化的重要树种。特征丝兰茎短,叶基部簇生,呈螺旋状排列。叶片坚厚,长50cm～80cm,宽4cm～7cm,顶端具硬尖刺,叶面有皱纹,浓绿色而被少量白粉,坚直斜伸,叶缘光滑,老叶具少数丝状物。夏秋间开花,花轴发自叶丛间,直立高1m～1.5m,圆锥花序,花杯形, Yucca gloriosa L., also known as Pteris oryzae, thick-leaf yucca, is a common lily of the genus Yucca woody, is an important species of landscaping. The characteristics of Yu Lan stem short, clustered at the base of leaves, arranged in a spiral. Blade thick, long 50cm ~ 80cm, width 4cm ~ 7cm, the top hard spiked, wrinkled foliage, thick green and a small amount of white powder, straight oblique, smooth edges, old leaves with a few filaments. Summer and autumn flowering, flower axis from the leaves between the erected 1m ~ 1.5m high, panicle, flower cup-shaped,