[Trinity] Plant identification in Trinity College MS O.2.48 Apuleii Herbarium

[MarcoP]

Also, there's a monogram on f.67r which, in my opinion, does not allow for the reading of "I or L + S" - I can only read this as a D

Transcritpion (from just above the plant): v sunt species huius herbe scabiose. de qualibus una vocatur | morsus demonis. {plant} quod demones fugat. dicitur morsus | demonis quod non habet {plant} radicem medianam. Et ista dicunt | scabiosa maior {plant} .Magnas virtutes habet occultas. | D. testatur quod propter amorem | cuiusdam mulieris in qua ipse intellige | bit quod demon cor rodit | Radicem magistram huius herbe. quod ipsa | mulier decepit ipsum demo | nem et noluit cum [eo] asaciari


Translation: there are five types of this Scabiosa plant, one of which is called Morsus Demonis [devil's-bit] because it makes devils flee. It is called devil's bit because it does not have the central root. This is called Greatest Scabiosa. It has many occult powers. D says that, for the love of a woman with whom he conversed, a devil gnawed away the main root of this plant, because the woman deceived that devil and did not want to unite with him.

Yes, I think the passages you collected strongly suggest that the "mystery source" is some medieval pseudo-Dioscorides.