Wiktionary
xanthorrhoea
n. (context botany English) Any of the genus ''Xanthorrhoea'' of grass trees.
Wikipedia
Xanthorrhoea
Xanthorrhoea is a genus of about 30 species of flowering plants endemic to Australia and a member of family Asphodelaceae, being the only member of subfamily Xanthorrhoeoideae. The Xanthorrhoeoideae are monocots, part of order Asparagales.