Generative nuclei The two gametic nuclei formed by the division of the generative cell in the pollen tube of angiosperms.

在被花粉管中的生殖细胞（应雄原核译者注）分裂成两的核。

Heteranthery exists in several angiosperm families, such as Melastomataceae, Solanaceae, Lythraceae, Leguminosae and Pontederiaceae, but the aspects and extent of differentiation often vary in taxa.

异型雄蕊在野牡丹科、茄科、干屈菜科、豆科、雨久花科等多科中都有分布,但其分化与程度常随类群而异。

Heteranthery exists in several angiosperm families, such as Melastomataceae, Solanaceae, Lytbraceae, Leguminosae and Pontederiaceae, but the aspects and extent of differentiation often vary in taxa.

异型雄蕊在野牡丹科、茄科、千屈菜科、豆科、雨久花科等多科中都有分布，但其分化与程度常随类群而异。

In roots, however, the concept is still applied, and in some angiosperm roots a fourth histogen zone is recognized, the calpytrogen, which gives rise to the root cap.

然而在根中，它还是适用的。在一些被的根中，还发现了第四种组织原，即calpytrogen，与根冠发生有关。