limber pine

1. Research on the Factors Influencing the Formation of Adventitious Roots of Limber Pine Shoots by Tissue Culture
   柔枝松组培苗不定根形成的影响因子探讨
2. Small pine of western North america; having smooth gray-white bark and soft brittle wood; similar to limber pine.
   北美西部一种小型松树；光滑的灰白色树皮，木质脆软；类似于狐尾松。

noun

1. western North American pine with long needles and very flexible limbs and dark-grey furrowed bark

   Synonym:    Pinus flexilis