The last plumule floated away.
"The Lilac Sunbonnet"
S.R. Crockett
It is because there is so much food stored in the first two that the plumule can develop before a root is formed, while in the others there is only nourishment sufficient to enable the plantlet to form its roots.
"Outlines of Lessons in Botany, Part I; From Seed to Leaf"
Jane H. Newell
They may also be divided into those with and without the plumule.
"Outlines of Lessons in Botany, Part I; From Seed to Leaf"
Jane H. Newell