The Plant Press

Lost South American wildflower named “extinctus” rediscovered (but still endangered) [Video]

From Plant Press, Vol. 25, No. 3, July 2022.

-Adapted from the Field Museum.

Scientific names get chosen for lots of reasons-- they can honor an important person, or hint at what an organism looks like or where it’s from. For a tropical wildflower first described by Smithsonian Botanist Laurence Skog and his colleague Lars Kvist in 2000, the scientific name “extinctus” was a warning. The orange wildflower had been found 15 years earlier in an Ecuadorian forest that had since been largely destroyed; Skog and Kvist suspected that by the time they named the species, it was already extinct (Syst. Bot. Monogr. 59: 1-118; 2000; https://doi.org/10.2307/25027883). But in a new paper in PhytoKeys (https://doi.org/10.3897/phytokeys.194.79638), researchers report the first confirmed sightings of Gasteranthus extinctus in 40 years.

The bright orange flowers of the Ecuadorian cloud forest herb Gasteranthus extinctus, a species once long believed to have gone extinct. (photo by Riley Fortier)

“Extinctus was given its striking name in light of the extensive deforestation in western Ecuador,” says Dawson White, a postdoctoral researcher at Chicago’s Field Museum and co-lead author of the paper. “But if you claim something's gone, then no one is really going to go out and look for it anymore. There are still a lot of important species that are still out there, even though overall, we're in this age of extinction.”

Botanical data for all: The U.S. National Herbarium is digitized! [Video]

From Plant Press, Vol. 25, No. 3, July 2022.

By Sylvia Orli and Julia Beros.

The breadth of collections held at the U.S. National Herbarium (USNH) document the incredible biodiversity and botanical heritage on our planet and serve as the backbone of our work. In service to the public and as the foundation for research, these collections, as they exist now and grow, are at the core of our mission and purpose as an institution. Making these assets available, in physical and digital form, is a fundamental part of fulfilling our responsibility. The USNH is one of the world’s largest and most diverse botanical collections, accounting for nearly 5 million specimens, the digitization of which fulfills our goal to make specimen data and images discoverable and accessible to all.

Since 2015, the Department of Botany and the Smithsonian Digitization Program Office (DPO) have embarked on a joint project to digitize all pressed and packeted plant specimens, which comprise the great majority of our collections. Collaborating with the contracted digitization company Picturae, based in the Netherlands, we have employed a conveyor belt system and a high-throughput approach to realize this ambition. This approach to digitization provides high resolution images and transcriptions of label data for each specimen. These assets are ported to our data catalog and subsequently aggregated with global collections data from other herbaria. By these means, the digitization of the USNH has a huge impact on botanical research throughout the world—collecting and codifying data that can unexpectedly inform the work of researchers near and far.

Abstracts from the speakers of the 19th Smithsonian Botanical Symposium

From Plant Press, Vol. 25, No. 3, July 2022.

The 19^th Smithsonian Botanical Symposium, “Life on the Edge: Exceptional Plants in Exceptional Places,” was held on 13 May 2022. The invited speakers specializing in conservation, ecology, systematics, and genetics explored plant survival in extreme parts of the natural world. Below are the abstracts from the papers that were presented by the invited speakers.

Susan Pell (far left), USBG Deputy Executive Director, and Eric Schuettpelz (far right), Chair of the Botany Department, join the speakers of the 2022 Smithsonian Botanical Symposium at the National Museum of Natural History (from left): Fabián Michelangeli, Ben Nyberg, Jenna Ekwealor, Tanisha Williams, and Jessica Allen. (photo by Ken Wurdack)

Jessica Allen
Eastern Washington University
“Urban Lichens: Symbioses in the built environment”

Densely populated urban areas are centers of exceptional human culture, wealth and political power. The biodiversity that occupies major cities alongside their human inhabitants, while typically not exceptional in their rarity, are exceptional in their adaptability and resilience. Of the biodiversity observed in cities, lichens are some of the most colorful and ubiquitous. These quintessential symbioses are the dominant and most diverse organisms in many of the harshest environments on the planet, yet they are incredibly sensitive to anthropogenic change. In this talk I will discuss how lichens have responded to urbanization in the Northeast Megalopolis over the past two centuries and will compare these patterns to those observed in select cities around the world. I will discuss the lichens of New York City, the heart of the Northeast Megalopolis, in depth, where a documented decline occurred throughout much of the 19^th and 20^th centuries. Since the 1970s there has been a notable rebound in the lichens of New York, and I will introduced you to some of the remarkably resilient city-dwelling species that have managed to grow, and even thrive, in one of the mostly densely urbanized regions on the planet.

Jenna Ekwealor
Smithsonian Institution
“The secret lives of desert moss”

Desert plants experience extreme fluctuations in light, temperature, and water availability. These intense conditions shape the development, life history, and evolutionary trajectory of desert mosses. In this talk, I will present on two such processes: vegetative growth and sexual reproduction. First, I discuss the discovery of Mojave Desert mosses occurring as hypoliths under milky quartz rocks. To characterize this unique moss microhabitat, we deployed microclimate dataloggers and collected samples in a Mojave site containing quartz hypoliths. The results of this study highlight the need to consider microhabitats, especially in extreme environments, where mosses may find refuge from the prevailing macroclimatic conditions. Second, I discuss how natural populations of many desert mosses appear highly female-biased based on the presence of reproductive structures. The dryland moss Syntrichia caninervis is notable for its low frequency of sex expression and strong female bias. Using molecular methods, we uncovered the genetic sex of non-expressing shoots and compared the patterns of phenotypic and genotypic sex ratios in Mojave populations. The findings shared in this talk contribute to our understanding of how the environment may modulate habitat filtering, vegetative growth, and sexual reproduction in S. caninervis, either through its direct influence on physiology or through selection.

Michelangeli receives the 19th Cuatrecasas Medal [Video]

From Plant Press, Vol. 25, No. 3, July 2022.

The José Cuatrecasas Medal for Excellence in Tropical Botany is named in honor of Dr. José Cuatrecasas, a pioneering botanist and taxonomist, who spent nearly a half-century working at the National Museum of Natural History. Cuatrecasas had a distinguished career devoted to systematic botany and plant exploration in tropical South America, especially in the Andes, and this award serves to keep vibrant his accomplishments and memory. The Department of Botany and the U.S. National Herbarium present this award at the Smithsonian Botanical Symposium to a botanist and scholar of international stature who has contributed significantly to advancing the field of tropical botany. The award consists of a bronze medal bearing an image of José Cuatrecasas on the front with the recipient’s name and date of presentation on the back.

This year the 19^th José Cuatrecasas Medal for Excellence in Tropical Botany was presented to Fabián Michelangeli.

Fabián Michelangeli accepts the 19th José Cuatrecasas Medal for Excellence in Tropical Botany. (photo by Ken Wurdack)

Michelangeli earned a Bachelor of Science in Biology in 1993 from the Universidad Central de Venezuela in Caracas and a Ph.D. in 2000 from Cornell University for research on Tococa, a genius of ant plants in Melastomataceae. Since 2004 he has been a curator in the Institute of Systematic Botany at the New York Botanical Garden (NYBG) where he continues his research on Melastomataceae. With about 177 genera and 5,800 species, Melastomataceae is one of the most easily recognized tropical plant families and the Smithsonian and NYBG have some of the world's best collections due to multiple generations of curator research on the family.