Drawing a sycamore leaf - 2

Today I worked on the right side of the leaf.  Hard to know exactly how to tackle it, so I just started to draw and see what happens!  As you can sort of see from the photo, the leaf is not a consistent brown.  It has a mottled surface with lots and lots of dark brown 'freckles'.  This is a good thing and a bad thing, as far as drawing goes.  The good thing is that it is really handy having a leaf pattern or in this case mottle marks to help show how the leaf curves in space.  It is also helpful to convey highlight areas, because in these areas, the mottle marks will be much lighter, if you can see them at all.  But the bad thing is that it is sometimes hard to distinguish pattern from shaddow, when you don't have the benefit of color to work with.  I decided to dodge the quandary all together today and just focus on other things -- the curve of the leaf, the beginning veining marks, beginning to show shading and also some variation in the browns of the leaf.  I'll leave those pesky freckles for another day!