
And I was partly true. Eww.
Dandruff is caused my the shedding of dead scalp skin cells.

There are some cases where the metabolic rate is increased and there's replacement every 4 days! This would result in red, think, scalp of dandruff patches. There are referred to as seborrhea (seborrheic dermatitis). Seborrhea has been associated with a type of fungus known as Pityrosporum ovale, which is a flora, a.k.a a plant.

So there, we have plants on our heads!