| Perennial herb (perennial herb) herbs can live more than two years. Some of the underground parts of perennial plants such as perennial or rhizomes, bulbs, tubers and other sick organs, and the ground part of the annual deaths, and from the ground until the second part of the spring to grow new branches, flowering and fruiting, such as lotus root, onion, taro, sweet potato, Dahlia, etc.; also some ground and underground parts of plants are perennial, and by the blossom, the shoot is still dead, and to many strong, such as evergreen, wheat Asp and so on. |