Question

Due to its pagan roots, we also honour plants at Christmas time. But which of these yuletide plants are commonly called ‘phoradendron’ or ‘tree thief’?

Answer 1

Mistletoe

Step-by-step explanation:

Mistletoe is the English common name for most obligate hemiparasitic plants in the form Santalales. They are connected to their host tree or shrub by a composition named the haustorium, through which they obtain water and nutrients from the host plant. Their parasitic lifestyle has directed to some exciting variations in their metabolism. Inappropriate, the eastern mistletoe native to North America, Phoradendron leucarpum, refers to a different species of the family Santalaceae.

Answer 2

I believe the answer is Mistletoe.
Mistletoe is the type of plant that originated from Great Britain before it spread around the world through international trades.
The term 'tree thief' came from the parasitic nature of one of its type that stole nutrients from other trees