xiuhtla. yeruazal. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 159v. col. 2. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
XIUHTLAH a grassy place / yerboso (Z) [(2)Zp.131,228]. See XIHU(I)-TL, -TLAH. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 327.