According to the relative position of seeds on the plant, seed heteromorphism can be divided into amphicarpy and heterodiaspory.
根据异型种子在植株上的生长位置，种子异型性可划分为地上下结实性和地上种子异型性两类。
Amphicarpy and dispersal mechanism of Viola tuberifera endemic to Qinghai-Tibetan Plateau
青藏高原特有植物块茎堇菜地上地下结果性及其散布机制
Amphicarpy of Ceratocarpus arenarius is an especial reproductive strategy for adapting to variable environment in the Jungger desert and ensures the species to successfully inhabit.