Looking under the thickest of vegetation, trees, brush and such, sometimes I find good kindling. Pitch from pine might help get it going. I second what was said before here using evergreens.

I hike along rivers alot and this is a problem after rains. It is a pain, but I shave out sticks constantly to get them to burn and keep a fire going until embers form and then it gets easier. I do look for higher dry branches to break off, I'm a taller person at 6'5".. When hiking along rivers, I make it a habit now to carry along tightly rolled pieces of newspaper tied with twine and then dipped in parrafin. This has alleviated alot of the problem.