Western White Clematis - Clematis ligusticifolia
Western White Clematis
This is that thing that climbs the trees all summer long in the wild, and then in the fall the whole vine is covered with soft puffball seed-heads.
This vine will ramble and climb delightfully so - it is a superstar of the mountains. It grows high and low. Sweet white flower clusters make this a showy vine in spring followed by a gorgeous display in fall.