药室内壁 meaning in English

endotheca

The anther possesses four microsparangia with its wall composed of four layers : epidermis , endothecium , middle layers and a 2 - nucleate celled tapetum . most of the antheral tapetum are in situ
单穗升麻的花药具4个小孢子囊药室，囊壁花药壁由表皮药室内壁中层和绒毡层组成。
Their differences are based on many aspects which include characteristics of morphology , anatomy and epidermis of leaf , types of tapetum in anther walls , patterns of endothecial thickenings , and ways of development of endosperms , presence or absence of perisperm , components of photochemistry , and sequences of rbcl
菖蒲属与天南星科其它属在叶的形态、结构、表面特征，花药绒毡层类型，药室内壁增厚的特点，胚乳的发育方式，外胚乳的有无，植物化学成分， rbcl基因序列等多方面存在着显著的差异。