plantae

Green algae, which are essentially being farmed by the fungus, are closely related to Plantae and are often included in the kingdom in the broad sense (Plantae sensu lato ).

However, all current definitions of Plantae exclude the fungi and some algae, as well as the prokaryotes (the archaea and bacteria).

Well they aren't part of Plantae either, but sources seem even more conflicted there.

Equal peas with all the kingdom plantae leads to this misunderstandings.

A minute of silence for the first spatial member of the plantae kingdom killed so many miles far away from home in such horrible lab accident.

But the volume of thick loamy topsoil isn’t mostly tiny rock grains (sand) but a living amalgam of bacteria, fungi, plant matter, plantae, animal detritus (faeces but also cast off skin or carapaces...).

My guess is that simosx is using the term "plant" in the strict/colloquial sense, not the either Plantae kingdom (so not including things like cyanobacteria).

So by definition plants should be green for phototrophy ("feeding on light"), until it would somehow evolved chlorophyllic cells, but ot seems they are older than plantae themselves.

To add a more scientific example, "The Biology and Ecology of Giant Kelp Forests" (2015) similarly begins by explaining that kelp are brown macroalgae belonging in the kingdom Chromista rather than Plantae, and are thus is not technically plants.

However, the strategy is not limited to Plantae; starfish have nothing recognizable as a brain, but display very definite intentional behavior.

Plants are also Eukaryotes but Fungi and Animalia have a more recent common ancestor than either has with Plantae.

Red and brown algae have been moved out of the kingdom of Plantae, as they are believed to have developed photosynthesis independently.