why the voynich ist celtic

[Petrasti]

Source and further reading  T.F. Thiselton Dyer, Folk-lore of Plants, 1889. You are not allowed to view links. Register or Login to view.

It's generally not a good idea to quote books or papers written 100+ years ago: research has progressed a lot since then, and most of them only have an historical value nowadays. Google Scholar finds 15000 hits searching for "Celtic folklore plants" from 2000 onwards, so there are lots of newer, more reliable, texts to choose from.

It makes no difference how old a book in this case is. the text is intended only to link the connection between the plant spirits in the Voynich and well-known stories. The old belief or belief in nature was lived by our ancestors and was existence, tradition, healing, and faith. The older the book, the closer the memories of the old days are. For example: here in the Black Forest, in the year 2025 :-) (despite Christianization), we still say to this day, "If you see an elderberry, then take off your hat."
(The saying "If you see an elderberry, then take off your hat" is an old folk wisdom based on the veneration and belief in the protective and healing power of the elderberry bush. It goes back to the mythological significance of the elderberry as the home of protective spirits and goddesses like Mother Holle, as well as to the recognition of its diverse healing properties. The gesture of taking off one's hat was meant to show respect and secure the tree's blessing.)
Many old farms have their own linden trees. The linden tree is the family's protective tree. (In Germanic times, the linden tree was a sacred tree and a place of gathering. It was believed to be the seat of good spirits.) On the Saturday after Ash Wednesday, a fire is lit on the mountain to drive away the winter spirits.

In England and Ireland, the Celtic faith was practiced longer and more intensely. The suppression of the traditions occurred not so long ago. The old belief remains much stronger and more pronounced there than in other parts of Europe.