Three types of flowers that are used in the celebration of Dia de Los muertos are
The Cempasúchil, the nube (cloud), and the terciopelo. This flowers grow a lot in the main region of Mexico, since the time of prehispanic. These types of flowers have been put in offerings for a lot of generations of Mexican families.
The Catholic world
Day of the dead is celebrated throughout Mexico and the Catholic world. Italy, Spain, South America and the Philippines all celebrate All souls and All saints day on November 1st and 2nd. Special masses and cleaning of the cemetery tombs are part of the traditional activities. It's only in Central and Southern Mexico where the colorful parties take place in the cemeteries and elaborate altars that are built in homes to honor specific family members who have passed on.