simple leaves
Leaves with an undivided blade; there are many types, grouped according to shape.
lanceolate 
Simple leaf with a narrow blade that is longer than it is wide, ending in a point.
ovate 
Simple leaf with an egg-shaped blade.
peltate 
Simple leaf with a petiole attached perpendicularly to the center of the blade’s underside.
linear 
Simple leaf with a long and very narrow blade and almost parallel margins.
orbiculate 
Simple leaf with a somewhat rounded blade.
cordate 
Simple leaf with a heart-shaped blade.
hastate 
Simple leaf with a spear-shaped blade.
spatulate 
Simple leaf in which the blade widens, taking the shape of a spatula.