Lamina conspicuously asymmetric, or not conspicuously asymmetric. Vegetative buds scaly. Leaf anatomy . Adaxial hypodermis present. The mesophyll with sclerencymatous idioblasts.
Minor leaf veins without phloem transfer cells.
Stem anatomy . Secretory cavities absent. Nodes tri-lacunar, or multilacunar. Secondary thickening developing from a conventional cambial ring. Xylem with vessels.