Matching Plant Images Internally

[Jorge_Stolfi]

As discussed extensively in this thread, several plant drawings in the Herbal section have "echoes" in the Pharma section.

One notable example is the plant on Herbal You are not allowed to view links. Register or Login to view. (H) that is extremely similar to the one at the bottom right corner of Pharma f102r1 (P).  It is not just the same plant, but largely the same drawing.  Even the number of branches (2) and the way they curve down is basically the same.

The main differences are:

• H has a flower (and either a black berry or a black flower core). P has no flower.
  
• H has a full set of ~25 leaves.  P has only five leaves, and branches are truncated.
  
• The leaves of H have stalks of varying lengths, many even zero.  The leaves of P all have stalks half as long as the leaves.
  
• The leaves of H taper towards the base, so that the two "ears" (auriculae) of each leaf are right next to the stalk. The leaves of P are widest at the base, so that the two auriculae are well separated from the stalk.
  
• The root of H has three similar "lobes", each drawn as a stubby cylinder with flat end (presumed round, but turned away from the reader, so that only half of the rim is visible). The root of P has a background lobe that looks roughly like that, but the other two lobes are replaced by a spread-out lump with two modest humps, whose bottom and distal edges are outside the page.
  
• On the root of H, the outlines and hatchings of the three lobes are quite varied.  On the root of P, the hatching is uniform over the whole root.
  
• The root of H has tendrils (rootlets) sprouting from the ends of each lobe and from the bottom of the two front lobes. The root of P has rootlets sprouting from the top of two lobes only.
  
• The root tendrils of H are either shaped like sharp claws or like long uniform threads drooping down.  The root tendrils of P are sharp straight triangular spines.
  

Obviously either P was copied from H, or H from P, or both were copied from the same original drawing.  Can we tell which of these alternatives is correct?

All the best, --stolfi