start with your leaf or leaves - take a picture for reference and crop it so there is not much background.
sketch it lightly
start with light washes of color, mostly yellow. I put the faint shadows in the help see the form.
Drop in some reds to get them to run.
next a layer of cool colors. Note we keep the white of the veins and highlights white or pale yellow!
using red and green make a brown - keep working darker and more detail in.
Last put in a light wash for the table and background. if you make the upper right hand corner a little darker it will recede in space.