Saguaro cacti tower over Arizona’s desert landscape.

Saguaro Cactus: A Desert Sentinel’s Prickly Plight

The saguaro cactus has evolved to endure dry days and high temperatures, but even this resilient plant struggles to cope with the effects of climate change.
Breadfruit (Artocarpus altilis): fruiting branch. Coloured etching by J. Pass, c. 1796, after J. Ihle.

Quintessential Resilience: The Breadfruit in the Caribbean

The breadfruit tree has coexisted with humans for more than three thousand years. Its future may depend on how strong of an ally humans can become to it.
Rosemary (Salvia rosmarinus) in bloom. Flowers can be pale blue, pink, purple, or white.

Rosemary: The Herb of Ritual and Remembrance

From ancient Egypt to today, the scent of rosemary has promised comfort, joy, and even immortality.
"Fresh, red cloves grow on the branch, green leaves. Zanzibar, Tanzania"

Cloves: The Spice that Enriched Empires

Behind one humble spice lies a complex history of empires and profit, commodities and globalization.
Medicago sativa

Alfalfa: A Crop that Feeds Our Food

In 2023, American farmers grew more than 9 million acres of alfalfa. What makes this legume hay so special?
Crocus sativus

Saffron: The Story of the World’s Most Expensive Spice

Appearing in the written record as early as 2300 BCE, saffron can be traced in foodways around the globe, despite the finicky nature of its harvest.
Quinoa seeds

Quinoa: Rise of an Andean Superfood

Once considered a minor crop for Indigenous communities, quinoa’s journey to worldwide stardom was centuries in the making.
A botanical illustration of Indigofera tinctoria from La botanique de J.J. Rousseau, 1805

Plant of the Month: Indigo

The cultivation of this plant for its cherished blue dye tells the story of exploitative agricultural practices—and, hopefully, its reversal.
Study of Hibiscus Plants by Adolf Senff

Plant of the Month: Hibiscus

Nearly synonymous with the global tropics and subtropics, hibiscus symbolizes the Caribbean’s transnational past, present, and future.
Humulus Lupulus No. 50 Common Hops, C. S. Rafinesque, Medical flora, 1828-1830. Rare Book Collection, Dumbarton Oaks Research Library and Collection.

Plant of the Month: Hops

As the craft beer industry reckons with its oppressive past, it may be time to re-examine the complicated history (and present) of hops in the United States