Question

why is loranthus known as partially parasitic plant?

Answer 1

Loranthus plants are also known partially parasite plants.
These plants are known as follows as they absorb nutrients from other plants as parasite. The plants from which they absorb are known as host plant.
Loranthus plants mostly feed from angiosperms mostly mango trees. They are attached to the Arial parts of the plants  so they do not have defined roots system. They have structure called hostoria attached on the host to absorbe water and nutrition.

Answer 2

Thanks for asking question.

Loranthus plants are famous partially parasitic plants as they  can absorb nutrient as well as water from other plants , they does not grow on soil instead they have special system known as "Historia" by which it penetrates in to woody tree and grow on aerial parts of tree.
As they can absorb the nutrient and water of their host plant so, they are known as parasitic plants.
Hope this will help you.