the leaf from the plant spotted spurge (Euforbia maculata) (see Molina)
IPAspelling:
tʃɑlkwitɬɑtɬ
Alonso de Molina:
chalcuitlatl. yerba de la golondrina. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 19r. col. 1. Thanks to Joe Campbell for providing the transcription.