Bifolio as a functional unit?

[DG97EEB]

Here's a lovely example from the Wellcome Collection You are not allowed to view links. Register or Login to view.

Shelf mark: Wellcome MS 335. It's a collection of items, but the main part is described as a herbal:

8. pp. 75-372 Herbal in Latin

p. 75 Absinthium est calidum in primo et siccum in 2o ... p. 372 ... et confert ulceri matricis per prouocationem menstruorum. Pandecta. Auicenna. Serapio. Explicit herbarius.

I could not find out from the description if the MS itself has been written on paper or parchment.

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"Physical description
1 volume 473 pp. + 3 [4] bl. ll. tall 8vo. 21 1/2 x 7 1/2 cm. Original vellum binding, worn: ties wanting. With 116 watercolour illustrations of plants. Some (blank?) leaves have been cut out: one between p. 4 and p. 5, two between p. 62 and p. 63, one between p. 88 and p. 89, p. 102 and p. 103, p. 274 and p. 275, and after p. 473. Page 473 and the last blank leaf are defective, p. 339 has been repaired and the illustration is damaged. Written in a small current French hand. Ornamental initials in red, or red and green, with marginal decorations, headings and paragraph marks in red. There are pen-drawings of grotesque heads, etc. on pp. 47, 52, 56, 58, 60, 61, 64. The pagination is modern"

I guess you saw that already... Doesn't really tell us much.. will see if I can find other catalogue information.