thistledown thistledown /ˈθɪsəlˌdaʊn/

noun

1. Pappus of a thistle consisting of silky featherlike hairs attached to the seed-like fruit of a thistle  ( thistledown )
   pappus of a thistle consisting of silky featherlike hairs attached to the seed-like fruit of a thistle
    The wind carried the thistledown away, making the fields seem like they were covered in a soft white blanket.
   The wind carried the thistledown away, making the fields seem like they were covered in a soft white blanket.