noun, plural fo·li·a [foh-lee-uh] /ˈfoʊ li ə/.
Origin of folium
Examples from the Web for folium
With Folium, in Latin, is rightly associated the word Flos; for the flower is only a group of singularly happy leaves.Proserpina, Volume 1|John Ruskin
Foliaceous, belonging to, or of the texture or nature of, a leaf (folium).The Elements of Botany|Asa Gray
The branches run for some distance parallel to the axis of the folium and terminate in unbranched ends.
In its leaves we have a good example of the folium mucronatum.The Botanical Magazine, Vol. 13|William Curtis