A.表面呈波狀或齒輪狀,具單孔B.花粉表面有似網(wǎng)狀雕紋,具萌發(fā)孔3個(gè)C.花粉粒外壁有齒狀突起,具萌發(fā)孔3個(gè)D.花粉粒外壁有細(xì)刺狀突起,具萌發(fā)孔3個(gè)E.花粉粒極面觀略呈三角形,赤道面觀雙凸鏡形