[split] f35v parallels "oak and ivy"

[MarcoP]

Marco, I see the situation as follows.

• In the Leiden MS there's a loose vine on a host that does not look like oak.
  
• In the VM there's a loose vine on a host that looks like oak.
  
• In the Tractatus de herbis there's clinging ivy on a host that looks like oak.
  

In other words, the VM has the style of winding in common with the Leiden MS, but the host with the Tractatus. The evidence does not allow to put the VM in a line of direct dependence on the Arabic tradition, but the same holds true for the Tractatus. I think all three are different end points on the same branch of their family tree.

This contradicts the evidence we have.

Oak as a support tree was introduced by Manfredus de Monte Imperiali in BNF 6823.
Manfredus based his illustrations on Egerton 747 (which might have been influenced by Arabic sources) but he improved them with further direct observation of actual plants (Egerton 747 is considered to be the first herbal after classical times in which extensive observation of nature is evident). In the Ivy illustration, Manfredus added veinings to the leaves and corrected the shape of the berry clusters. 
If one compares the two manuscripts, it is clear that oak was not present in his model ivy illustration but was derived from Egerton 747 oak illustration.