Assertion: arctic willow | /r/HasProperty | salix purpurea
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Source sentences:
text: A spreading shrub or upright small tree, the blue Arctic willow (Salix purpurea) also is called purple osier because of its reddish purple young twigs.
text: The Arctic Willow (Salix purpurea) is native across a broad area from Europe to western Asia, from North Africa up into the British Isles, and the Baltic region.