It certainly could be. This would basically be the equivalent of a textual description without images (the vast, vast majority of manuscripts lack illustrations). During our talks this was touched upon: if the description (written or spoken) was something like "the flower looks like that of a lily", then the artist might just use their standard image of a lily flower. This would explain the "composite plants" phenomenon, as well as the apparent recycling of motifs.
I don't recall if I cut this out or left it in the video, but my objection to this was that textual (or spoken) sources can only explain so much. Especially in the roots, I suspect some influence of visual traditions. Take You are not allowed to view links.
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"So this plant has round leaves that hang down from horizontal stalks, in three rows. You got that? Okay, now the root - pay close attention to what I'm saying okay? The root looks like two horses that are conjoined at the head. The horse on the left is larger than the one on the right. Okay. Now, they have unsettlingly large penises that intertwine. A bit larger."
I find it hard to imagine that something like that would stem from what was intended as a description of the plant in terms of what it looks like. At the very least, there must be some additional information processing going on here, relating to the name of the plant (doubtful in this particular case in my opinion), its usage, associated folklore... And that's only if we assume that every Voynich plant is intended to represent an actual plant to begin with.
Part 3 will mostly be some more free form discussion that I wasn't able to fit into part 1 and 2. It's basically for the handful of people who enjoy watching us talk about Voynich plants