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。
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The task selects the up to the minute mesoscale numerical model as our forecasting model and use thrice fixed nesting and terrain datum of down to dale ( highest precision data of 30s ) as our terrain datum in the endothecium 本文选择了当今最为先进的中尺度数值模式mm5v3作为数值预报模式，采用三层固定网格嵌套，选用其最新提供的30s高精度资料作为内层重点考察小区的地形资料。
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