The head of Glandular Hairs are subspherical and multicellular handle arranged in single or double lines. (2) Palisade tissue of young leaf and shade-leaf is dome-like.

• 第二，幼叶、阴叶栅栏组织呈“小丘”状，阳叶栅栏组织细胞体积较小，排列紧密，孔隙度小，海绵组织疏松，气下室空腔大。