Likewise, certain angiosperms, for example, some Eucalyptus species, will present few seed harvesting problems. 同样某些阔叶树种，例如一些桉树类，采种的问题不多。
From the leaf anatomic stucture, the ability of controlling water transpiration in conifer trees species withdeveloping cutin layer and deep stomia was stronger than in broadleaf. 从叶片解剖构造的主要特点看，针叶树种的角质层发达，气孔下陷，控制水分散失的能力强于阔叶树种。
