Rename
the joints you just created and name
them something easy to remember. I can't
stress this enough, using a good intuitive
naming convention will save you lots
of headache when you start dealing with
larger scenes.
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Switch
to the Top Viewport and draw another
joint chain this time following the
stem of one of the leaves.
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Switch
back to the perspective and notice that
it's not in place. Select the joints
and move them vertically into place.
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Make
sure that the pivot point for the joint
is inside of the stem for the leaf.
Click image for larger version
Now
work your way down the chain and move
those joints into place like the first
until you get a nice arc and joint chain.