叶原基、花原基（floral primordium）和侧根原基等最为常见。叶原基不是从生长点顶端分化的，而是从生长点顶端稍后一点的侧面以外生的方式出现；但花原基则是在生长点...
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... folium primordium 初发芽 flower primordium 花原基 thyroid primordium 甲状腺原基 ...
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被子植物的花由花分生组织(又称花原基)形成。
In angiosperms, after the floral transition, the inflorescence meristem produces floral meristems (FMs).
花的被片比雄蕊发育的要早，均由花原基发育而成。
The tepals were developed earlier than the stamens, both from the floret primordium.
结果显示花原基分化和开花的起始节位是第一真叶节；
The results showed that the differentiation of floral primordium and flower firstly occurred at the axil of the first leaf.
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