a many-branched stem of bright yellow flowers

A single long stem branches out into several tips, each one of which ends in a bright yellow flower. The stem is over two feet long, but each flower is less than half an inch across.

They are a many-branched stem of bright yellow flowers.
They weigh less than an ounce.

You identify a many-branched stem of bright yellow flowers.
They are plants.
They weigh six drams, and they are worth about five celeb.
Their keywords are flowers, flower, plant, bright, yellow, and ragwort.