perennial rushlike flowerless herbs with jointed hollow stems and narrow toothlike leaves that spread by creeping rhizomes; tend to become weedy; common in northern hemisphere; some in Africa and South America
horsetail详细解释
horse.tail n.（名词）Any of various nonflowering plants of the genusEquisetum, having a jointed, hollow stem and narrow, sometimes much reduced leaves. Also called equisetum 木贼属植物：多种木贼属 不开花植物，其茎中空有节，其叶狭长，有时十分小 也作 equisetum
