Columbia subject headings:
Central America--Antiquities.
Indians of Mexico--Ethnobotany.
Mayas--Antiquities.
Mayas--Ethnobotany.
Mexico--Antiquities.
Plants, Useful--Mexico.
Plants--Mythology.
Harvard subject headings:
Central America--Antiquities
Indians of Mexico--Ethnobotany.
Mayas--Antiquities
Mayas--Ethnobotany.
Mexico--Antiquities
Plants, Useful--Mexico.
Plants--Mythology
Princeton subject headings:
Central America--Antiquities.
Indians of Mexico--Ethnobotany.
Mayas--Antiquities.
Mayas--Ethnobotany.
Mexico--Antiquities.
Plants, Useful--Mexico.
Plants--Mythology.