The Collaborative International Dictionary of English v.0.48:
boughless \boughless\ adj. 1. having no limbs. Opposite of limbed. Syn: limbless. [WordNet 1.5] 2. lacking a bough or boughs. Opposite of boughed. [WordNet 1.5]WordNet (r) 3.0 (2006):
boughless adj 1: having no boughs (of trees)