Many species had tomentum and lepidoste usually covering leaves, and some species had devoloped thorny shoots or leaves, so as to adapted to dry habitat.
很多种以叶片被毛或鳞片和枝叶刺化适应干旱生境。

Peduncles with sparse arachnoid tomentum when young, then gradually falling off.
幼时的花序梗具具稀疏蛛丝状毛，然后逐渐从上落下。

There were plenty of tomentum on the cultivated LEC surface.
扫描电镜观察LEC立体感强、细胞表面微绒毛丰富。

young shoots with a dense grayish tomentum and a few glandular hairs.
幼枝具一紧密的浅灰色的绒毛层和一些腺毛。