Calyptra 1.The root cap: a conical-shaped structure that is formed by the activity of the meristem at the root apex and forms a protective cap around the root tip.

• 帽状体：1.；根冠：位于根尖的最前端，像帽子一样套在分生区外面，保护其内幼嫩的分生组织细胞。