How far do the lobe sinuses stretch, almost to the leaf mid-vein or 1/2 way to the mid-vein?
Sinuses almost to leaf mid-vein
Lobe sinuses stretch almost to the leaf mid-vein; vein crotches have hair on the leaf underside
OR
Sinuses 1/2 way to mid-vein
Lobe sinuses stretch 1/2 way to the mid-vein