Leafless and ephemeral, the ghost orchid seems to float in the shadows of South Florida’s wetlands. They’re a mystery that has fueled books, films, and decades of fascination. But behind the mystique is a far more complicated reality. Fewer than 900 ghost orchids remain in Southwest Florida, where habitat loss, development, and hydrologic modification continue to erode the wetlands they depend on. Protecting the species requires more than admiration; it demands long-term science, collaboration with many institutions, and habitat restoration.

At the University of Florida, ghost orchid research sits at the intersection of horticultural science and restoration ecology. Understanding how plants grow, establish, reproduce, and persist is as important as preserving the landscapes they inhabit. That balance defines the work of Dr. Carrie Reinhardt Adams, associate professor in the Horticultural Sciences Department, whose research focuses on native plant establishment, conservation, and restoration in stressed ecosystems.

Signals of a Healthy Ecosystem

The ghost orchid depends on a very narrow set of conditions, all of which have to align for the plant to survive. That sensitivity is precisely what makes the species so informative.

“The ghost orchid is an important indicator of a healthy ecosystem because it has extremely specific habitat needs,” Adams said.

In South Florida, ghost orchids grow almost exclusively in pond apple sloughs, wetland habitats that are themselves imperiled. Adams explained that “stresses such as hydrologic modification, development, and fire suppression” are altering these systems, affecting not only the orchid but many of the species that share its habitat.

The ghost orchid’s dependence on one specific pollinator, the sphinx moth, and its dependence on other tightly defined environmental conditions make it unusually sensitive to subtle ecological changes. Adams also noted that its visibility and public recognition give it added conservation value.

“The ghost orchid is also not just an environmental indicator,” she said, “but because it garners so much popular attention, it’s a really good gateway species of concern for understanding these ecosystems.”

Taking the Research From the Swamp to the Lab

Research is conducted by Adam Herdman, a doctoral student in environmental horticulture. Herdman has been monitoring wild populations since 2016, and observations made over the years have informed real-world conditions with experimental approaches to understand what limits ghost orchid persistence.

Ghost orchids were reintroduced into the wild in 2018, and Herdman has returned to those sites each year to track survival, flowering, and reproduction. While some plants persist for several years and even produce flowers, the question of how to maintain long-term population stability remains unanswered.

According to Herdman the reintroduced orchids are able to survive and attach, but so far have not produced any viable seed. That outcome has shifted the research focus toward the finer-scale horticultural and ecological factors that determine establishment. Field observations suggest that surrounding plant communities, including mosses, ferns, lichens, and host tree characteristics, play an important role in whether orchids successfully attach, grow, and reproduce over time. Herdman is now studying whether the isolated ghost orchid populations contain enough genetic diversity to reproduce successfully.

In the lab, the challenges of ghost orchid growth become clearer, revealing how narrow the conditions for germination and reproduction really are. Ghost orchid seeds are microscopic and contain no stored energy, meaning successful germination depends on landing in precisely the right conditions and forming the correct fungal partnerships.

“These species rely on pure coincidence – the seed falling in the exact right spot with good neighbors for it to grow. It’s really a magical sort of experience,” relayed Herdman, “It’s even more special when you see an orchid in the wild, because, of course, it started as a dust-like seed [in the lab], and takes years and years to grow into a large enough plant to flower.”

Protecting What Still Exists

While propagation and reintroduction remain important tools, Adams emphasized that long-term conservation must also prioritize the ghost orchid populations that still persist naturally.

“This really leads to our big take-home message for the species,” Adams said. “It’s incredibly important to protect, conserve, and document the existing natural populations we still have, which is why I’m excited that our program is part of an effort to monitor remaining ghost orchid populations.”

That monitoring effort brings together researchers, land managers, and conservation partners to establish baseline data across South Florida. The work was initiated in 2014 by Dr. Lawrence W. Zettler, Professor of Biology and Director of the Orchid Recovery Program at Illinois College, and Dr. Michael Kane, UF faculty emeritus. By documenting where ghost orchids occur and how those sites change over time, the work provides land managers with guidance on how hydrology, disturbance, and land-use decisions affect orchid viability. In ecosystems where subtle environmental changes can have outsized consequences, documenting current conditions is a critical step toward informed restoration and long-term stewardship.

This emphasis on documentation, collaboration, and shared responsibility extends beyond Florida. Ghost orchid conservation is part of a much larger network of researchers, institutions, and practitioners working together to protect vulnerable orchid species worldwide.

Recognition Through Partnership: Orchid Conservation Chelsea

As part of a larger network, UF/IFAS researchers have contributed to conservation-focused exhibits presented at the Chelsea Flower Show through Orchid Conservation Chelsea, an international effort that brings together institutions to highlight native orchids and the science behind their protection.

In 2023, the exhibit titled Finding the Rare Florida Ghost Orchid, and More, received a Gold Medal from the Royal Horticultural Society (RHS). It centered on endangered orchids from Florida and other regions, emphasizing habitat protection, applied research, and long-term conservation strategies. It drew on decades of ghost orchid research from Kane.

John Parke Wright IV, Chair of Orchid Conservation Chelsea and UF Alumnus, coordinated the effort with Zettler. Together, they have helped bring researchers, conservation practitioners, and institutions into a single collaborative framework.

For Zettler, Chelsea provides an opportunity to communicate conservation science to a broad public audience.

“The Chelsea Flower Show has been described as the Olympics of horticulture,” Zettler said. “The Florida ghost orchid has been described as the signature orchid of North America.”

More recently, in 2025, Orchid Conservation Chelsea received an additional RHS award for a separate exhibit, From Hong Kong to Australia: The Orchids of Asia and the Pacific, reflecting the continued evolution of the collaboration and its expanding geographic scope. Alongside Adams and Herdman, partners included institutions such as Royal Botanic Gardens, Kew, Illinois College, and several US-based botanic gardens and conservation organizations.

What is showcased internationally through Orchid Conservation Chelsea is grounded in ongoing field research and conservation practice in Florida, and the responsibility for that work extends beyond any single exhibit.

“Orchids don’t have a voice themselves, so we represent them. They’re the world’s most vulnerable group of plants, and every species has its own story,” relayed Zettler.

For more information about Dr. Carrie Reinhardt Adams and Adam Herdman’s ghost orchid conservation efforts at UF, visit: adamsecologylab.com

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