Answer:

pilea

Answer	Crossword Clue
PILEA	Tops of birds' heads
PILEA	Ornamental plant
PILEA	Tops of birds' heads.

PILEA	Locales for crests
PILEA	Birds' pates
PILEA	Parrots' pates
PILEA	Ornamental nettle

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.