palea
Concise Oxford English Dictionary © 2008 Oxford University Press:
palea /ˈpeɪlɪə/
▶noun (pl. paleae /-lɪiː/) Botany the upper bract of the floret of a grass. Compare with lemma2.
– origin C18: from L., lit. ‘chaff’.
'palea' also found in these Oxford entries:

