一年生的

Herbs paludose or aquatic, perennial or under unfavorable conditions annual.

草本沼生或水生，多年生物或在不利状况下为一年生草本。

The kind of plant is a hardy annual.

物是耐寒一年生物。

The dodder is one kind of annual autoecious weed of alfalfa, cosmopolitan weed quarantine object.

要菟丝子是苜蓿田中最一年生寄生性恶性杂草，是世界性杂草检疫对象。