Sentence:  Closely related to <WSD>least willow</WSD> (Salix rotundifolia) but differs in having large, slightly hairy capsules, abundant skeletonized leaves, and 3-5 pairs of veins on leaves instead of 2-3 pairs in <WSD>least willow</WSD>. 
Meaning of the word marked with <WSD> tags:  (ver=180323), a densely matted shrub growing in tundral regions.