New Issue: Orbital Catastrophe Ahead? Read Now

Poem: ‘The Covert Herbarium of Cryptogamic Botany’

Science in meter and verse

Illustration of a pear and a man painting on its stem

Masha Foya


On supporting science journalism

If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.


A century ago a father and a son
labored to replicate the intricate
structure of nearly eight hundred
species of plants in four thousand
delicate models. Leopold Blaschka
and his son Rudolph were masters
of lampwork, blowing and shaping
glistening molten glass over a torch
of blue flame. Fame came to them
when Harvard University put most
of the collection on permanent display
in its Museum of Natural History.
What was kept locked away were
the monstrous Venturia inaequalis,
Taphrina deformans, and a taste of
Monilinia fructigena, a grotesque
perversion of beauty called fruits
in decay. For a few short months
in the nineteenth year of this,
the third millennium, just before
a worldwide pandemic laid waste
to humans, out came twenty examples
of peach leaf curl, pear scab, brown
rot and a whole pale microcosm
of Aspergillus rising from the cabinet
floor in tiny zombie-flesh trees.
Cryptogamic bodies like ferns, mosses,
algae and fungi spread themselves
around by spore, so more of an orchard
will share an infection, the placards said.
Detection still comes from studying
the spots, dots, desiccations and rot
in this fragile freaks’ gallery, simulacra
of apples sharing a barrel of cultivated
Latin names for diseases at once as old
and relentless as withering time, and yet
with a genius for budding afresh to breed
death in our run-amuck Garden of Eden.

Nancy Brewka-Clark of Beverly, Mass., writes short stories, nonfiction, and plays as well as poetry. Winner of the 2019 Amy Lowell Poetry Prize and finalist for the 2022 Princemere Poetry Prize, she is author of the collection Beautiful Corpus (Kelsay, 2020).

More by Nancy Brewka-Clark
Scientific American Magazine Vol 333 Issue 5This article was published with the title “The Covert Herbarium of Cryptogamic Botany” in Scientific American Magazine Vol. 333 No. 5 (), p. 85
doi:10.1038/scientificamerican122025-4yXqkKUAptASAXy0oICCQP

Subscribe to Support Independent Journalism

Great science journalism requires human expertise, time, effort and creativity. And it costs money. That’s why I and the journalists here at Scientific American hope you’ll join our community.

When you subscribe, you are supporting staff and freelance journalists who are passionate about telling science stories that are true, important and compelling. Our editors and reporters are often experts in their fields, which means they understand the nuances of big discoveries and can untangle the breakthroughs from the hype. With a subscription, you are also supporting rigorous fact-checking to ensure the words we publish are precise and accurate. And you’re supporting original illustrations, graphics and photos that bring you closer to an advanced laboratory, an ice sheet in Antarctica or a space mission in orbit. You’re helping us craft other types of high-quality journalism as well: Our newsletters are carefully written, edited and curated by staffers you have or will come to know and love. Our Science Quickly podcast is based on original reporting, collaboration with editors and scientists and exacting production.

Subscriptions keep this engine running so we can continue to deliver thoughtful, rigorous and independent science journalism to you. In an era of viral misinformation, this work is crucial. If you value what we do, I hope you’ll consider joining us as a subscriber

Thank you,

Jeanna Bryner, Editor in Chief, Scientific American

Subscribe