No, fungi are not plants.

Wikipedia

Fungus - Wikipedia, the free encyclopedia

The Fungi (pronounced /ˈfʌndʒaɪ/ or /ˈfʌŋɡaɪ/) are classified as a kingdom that is separate from plants, animals and bacteria.

buzzle.com

Non Flowering Plants List

However, these are not true plants, as they lack true roots and leaves.

wholehealthnow.com

Non-flowering Plants

The five-kingdom scheme of classification of the living world places fungi in their own kingdom, distinct from the plants.

Yes, fungi are plants.

associatedcontent.com

Types of Non-Flowering Plants - Associated Content - associatedcontent.com

The following are some examples of non flowering plants: fungi, conifer trees, mosses, lichens and algae.