Leaves opposite, sessile, linear, semiterete or clavate, fleshy, rarely subulate or scale-like, base slightly expanded, apex obtuse or with a short, acicular awn;leaf axil usually cottony.

• 叶对生，无梗，线形，半圆柱形的或棍棒状，肉质，很少钻形的或鳞片状，通常的叶腋棉状毛。