Purdue horticulture professor earns award for illuminating secrets of the Voynich manuscript

Jules Janick, Purdue University’s James Troop Distinguished Professor of Horticulture, recently earned The American Botanical Council (ABC) James A. Duke Excellence in Botanical Literature Award for his 2019 book “Flora of the Voynich Codex: An Exploration of Aztec Plants.” Janick shares the award with his co-author, the late Arthur Tucker, emeritus herbarium director at Delaware State University.

The Voynich manuscript, a codex heavily illustrated with botanical illustrations that, until recently, was of ambiguous origin and language, had proved undecipherable to scholars for over a century.

In their 2018 book “Unraveling the Voynich Code,” Janick and Tucker establish that the manuscript dates from 16th-century Mexico, based on their analysis of the botanical drawings and maps contained in the book. The document was previously thought to have been a written product of 15th-century European botanists. This hypothesis is furthered in “The Flora of the Voynich Codex,” published by Springer, in which the authors elaborate on their identifications, linking the botanical illustrations to plants used in traditional herbal remedies by the Aztecs of southern Mexico in the 1500s.

“In “The Flora of the Voynich Codex,” identification [of the plants] was extended to 166 phytomorphs, all but one indigenous to the New World. It reinforced our mantra that there was no way that a manuscript with a sunflower and an armadillo could be a 15th-century European work (as both species are native to the Western Hemisphere),” Janick said. “The award is a final tribute to my dear friend and an indefatigable botanist."

According to Kenneth Teng, editor for Springer, this is the first and only publication to fully identify all plant species from the original Voynich manuscript, a feat which significantly fortifies the assertions Janick and Tucker made in “Unraveling the Voynich Code.”

Featured Stories

Ag Barometer
Farmer sentiment drifts lower as trade uncertainty hangs over agriculture

Farmer sentiment dipped slightly in December, with the Purdue University/CME Group Ag Economy...

Read More
Photos from the top 2025 stories for Purdue College of AG
What people clicked, watched and read in 2025

Explore the top content from 2025 for the Purdue College of Agriculture.

Read More
Wildlife alumna Lauren Wetterau kneels next to a red squirrel midden in the Greater Yellowstone ecosystem; a red squirrel sits on downed tree
Alumna Lauren Wetterau's Research Featured on Animal Planet Show

2023 wildlife alumna Lauren Wetterau is coming to a television screen or streaming service near...

Read More
Lenny Farlee shows teachers how to use a Biltmore stick at the Natural Resources Teachers Academy.
FNR Extension Set to Offer Four Editions of Forest Management for the Private Woodland Owner Course in Spring 2026

Do you want to learn more about trees, forests and how to better manage your woodlands for a...

Read More
FNR canopy image
Into the woods: Discovering forestry at Purdue

For Collin Morris, choosing Purdue Agriculture meant choosing a place that was close to home but...

Read More
Farm land with silos
Q3 agrifood industry sentiment stabilizes near baseline as investment appetite returns

This quarter’s Agrifood Economy Index (AEI) reveals that industry sentiment has stabilized...

Read More