The most famous monocarpic  perennial is probably bamboo, which can stay in its vegetative  state for up to 100 years.

最著名的多年生单是竹子，它以保持物状态长达 100 年。

Giant hogweed is a monocarpic perennial,   meaning it flowers only once after being in a vegetative state for a long period  of time.

巨型猪草是一种单多年生物，这意味着它在长时间处于物状态后只开花一次。