The petiole and the stem all posses assimilation, but con-tain very littls mechanicaltissue.
叶柄、茎均具同化功能,但机械组织不发达。
2
Bifacial leaf and mesophyll tissue contain crystals, phloem is rich in saliferous vacuoles, and the mechanicaltissue is developed.
异面叶,叶肉组织中含有晶体,韧皮部内富含含盐液泡泡,机械组织发达。
3
Many vessel numbers, small pore, libriform fibres (mechanicaltissue)and obvious secondary thickening of xylem tissue are the features of adaptation to the environment.