Spatial folded objects in variation have already been displayed in the articles:
Variation of Leaf #1, #2, #3 and
#4 in
ManyFolds in Variety.
The folded structures in there might not give visual impressions of blades, since colorations and 'heavy' modifications on those structures are much different to natural leaves... Here is another variation:

diagram
>> Click each image to see in larger scales <<
A valley crease of a diagonal line on a square is formed into the mid-lib of a leaf; triangles with those longer edges in alternating creases with acute angles along the lib are folded like nerves of the leaf. It is molded into a little longer length and narrow width in comparison to the original one in the earliest article:
Leaf.
Material: a sheet of square origami, without using adhesives.
Date: February 22, 2006
Photo date: February 23, 2006

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