There are several flowers / plants related traditionally to Christmas depending on where you are, these include Poinsettia, Christmas cactus, Holly, Ivy, and Mistletoe.
Contemporary flower bouquets used as Christmas gifts and centrepieces now tend to be more of a combination of colour rather than certain flower or plant types. These colours normally include red, gold, green and/or white as base colours.
You can see a range of contemporary Christmas flower bouquets at the related link.
Christmas Cactus, genus Schlumbergera
A poinsetta
The poinsettia, traditionally an American Christmas flower, originally grew in Mexico; where it was known as the "Flower of the Holy Night". It was first brought to America by Joel Poinsett in 1829.
Germans traditionally eat stollen, a fruited yeast bread, at Christmas.
Because it is traditionally eaten on Christmas eve.
A poinsettia is a very common Christmas flower.
What's the Christmas national flower in mexico
Traditionally NO
Traditionally silver thruppeny bits were placed into Christmas puddings in the UK
In the United States that would be the Poinsettia with its brilliant red and green colouring. Originally from Mexico it was brought to the United States by James Poinsett from Charleston South Carolina who was ambassador to Mexico in the 1830s. In Europe the tradional Christmas flower was Holly/ Mistletoe due to its bright red berries and glossy green leaves. This has now given way to the Poinsettia simply because is it more commerically available.
No. Christmas trees are traditionally pine.
On Christmas day is the day that you traditionally open your gifts.
No, traditionally in America at least, Christmas colors are mostly green and red. This may feature gold as well. Traditionally
Mistletoe perhaps. .... or even Christmas Stocking.