A conceptual internal plant match?

[Bernd]

Elephant of Cremona with 'o' eye
Matthew Paris, between 1235 and 1259 
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Koen, the bestiary.ca website lists the following sources for the mandrake association:
You are not allowed to view links. Register or Login to view. [circa 1200 CE] (folio 10v-11r)
You are not allowed to view links. Register or Login to view. [circa 1200-1272 CE] (Liber de natura rerum, Quadrupeds 4.33)
You are not allowed to view links. Register or Login to view. [ca. 1210 CE] (Bestiaire, Chapter 37)
You are not allowed to view links. Register or Login to view. [15th - 16th century] - is this a mistake? Many also appear to be from the 13-14th century

While I had never heard of this story, it was apparently widely known in medieval Europe.
Especially the Slavic Physiologus looks worth investigating as it has several German, French, Italian, Greek and Latin versions spanning over centuries