shield shaped meaning in Chinese

盾形的

The morphological characteristics are recognized as 3 types : nearly globe , nearly boat shape and nearly shield shape . the exine ornamentation can be divided into 5 types : reticulate , steiate - veticulate , tuberculate , verrucate and rugose - sinuate . the morphological characteristics show some vaviations among sections and species in terms of the shape of pollen and the exine ornamentation . and thus can be used as one of characters in the consideration of the classification of this genus . ( 4 ) the micromorphology of the seed coats were observed in 13 species
（ 4 ）所观察的该属13种植物的种皮表面纹饰可分为网纹、负网纹和皱波状三大类，且各个种之间在种皮微形态上均存在着一定差异，可以作为分种的依据；在组间，除属于有苞组( sect . amana )的t . edulis和其它组的种类有明显差异外，其余3组之间没有明显的界限，说明郁金香属的种皮微形态特征在组的划分上意义不大，但在种的划分上具有一定的分类学意义。