phyllis

As a proper noun Phyllis

is a girl who killed herself for love, and was turned into an almond tree.

As a noun phylum is

a rank in the classification of organisms, below kingdom and above class; also called a division, especially in describing plants; a taxon at that rank.

As a proper noun phyllis

is (greek mythology) a girl who killed herself for love, and was turned into an almond tree.

As a noun prune is

(obsolete) a plum.

As a verb prune is

to remove excess material from a tree or shrub; to trim, especially to make more healthy or productive.