Epithets

xylorhiza

woody root
xylorrhiza

woody root
yakushimanum

of or from Yakushima, an island in southern Japan
yezoalpina

from (the mountains of) Hokkaido
yezoensis

from (the mountains of) Hokkaido
yuccifolium

having Yucca-like leaves
yunnanense

of or from Yunnan, China
zaleucus

very white
zebrina

striped like a zebra
zonalis

banded or girdled with a distinct color