多年生草本植物的

The first year's weeds on the Michigan plot are annual flowering plants , followed by tougher perennials like crabgrass and ragweed . Woodier shrubs will shade and suppress the flowers , followed by pines , which suppress the shrubs .

第一年到访的杂草是每年开花的草本植物，接着被更坚韧的多年生植物如沙果草和豚草取代，木本的灌木丛会荫蔽并抑制开花植物的生长，随后松树又抑制了灌木的生长。

DNA C-value is of practical value in the forecast of the invasiveness of exotic species. However, such predictions must be made with comparisons within families because the DNA C-values vary greatly between woody and herbaceous species, between monocots and dicots, between annuals and perennials, and especially among families.

DNA C-值在预测外来物种的入侵性方面具有一定的应用价值，但是，由于在木本植物和草本植物之间、单子叶与双子叶植物之间、一年生和多年生植物之间，特别是在不同的科之间，植物的DNA C-值较明显的差异，因此，根据DNA C-值预测外来物种的入侵性，应该严格地限于同一科内的相关物种间的比较。

Large rhizomatous perennial grasses found by riversides and in ditches having jointed stems and large gray-white feathery panicles.

多年生有根茎的高大的草本植物，见于河边、水沟，茎有接头，有巨大的灰白色羽状圆锥花序。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。