n.any flowerless plant such as a fern (pteridophyte) or moss (bryophyte) in which growth occurs only at the tip of the main stem

1. Ferns are examples of acrogens, as they grow from the tips.
   蕨類植物是頂端生長植物的例子，因?yàn)樗鼈儚捻敹松L。
2. In botanical studies, acrogens are contrasted with other groups like thallophytes.
   在植物學(xué)研究中，頂端生長植物與藻類等其他群體形成對比。