All posts tagged with plants

Plant species worldwide face an increasing barrage of threats to their survival. The deliberate collection of rare plants poses a far greater threat to wild plant species. In Wild Plants in Trade (1992), the reasons and effects of wild collection on plants for cultivation and international trade can be found. The trade of orchids, bulbs, cycads, palms and tree ferns, cacti and other succulent plants, carnivorous plants and air plants were introduced in detail in the second half of this book, as well as the attempts to control the collection of these plants by the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) and governments.

The pineapple, indigenous to South America and domesticated and harvested there for centuries, was a late comer to Europe. The fruit followed in its cultivation behind the tomato, corn, potato, and other New World imports. Delicious but challenging and expensive to nurture in chilly climes and irresistible to artists and travelers for its curious structure, the pineapple came to represent many things. For Europeans, it was first a symbol of exoticism, power, and wealth, but it was also an emblem of colonialism, weighted with connections to plantation slavery.

Originating from the region around the Paraná and Paraguay Rivers (present-day Brazil, Paraguay, and Argentina), it was an important economic plant in the development of Indigenous civilizations in the Americas. The Tupi-Guarani and Carib peoples called the fruit, a staple crop, nanas (excellent fruit) and several varieties were grown. As well as food, the pineapple was a source of medicine, fermented to become alcohol, its fibers made into robes and bow strings and thread for cloth.

On 5 June 1834, avid amateur botanist Hardy Bryan Croom wrote a letter to botanist John Torrey describing a gymnosperm tree in northern Florida that he was struggling to identify. In this letter, he postulated—with some degree of confidence—that the tree was Taxus baccata, the common yew, and he hoped to acquire some specimens to send to Torrey for investigation.

Torrey was one of the most important 19th century botanists in America. He corresponded with hundreds of scientists in North America and Europe, many of whom sent him specimens from their various explorations for study and identification. As such a well-respected expert and advisor on botanical science, it comes as no surprise that Croom sought Torrey’s expertise regarding this mysterious Florida tree.

The next year, in a letter dated 18 November 1835, Croom wrote again to Torrey, stating:

“The letter which I wrote last summer has had the effect to procure me some perfect fruit of that remarkable Taxoid tree at Aspalaga. The result surprises me. It is an ovate one celled nut entirely enclosed in fleshy covering! as large as a pigeon’s egg! Calix imbricated; thus agreeing neither with Taxus nor with Podocarpus. Besides, the tree, I think, is dioecious, but of this I am not yet certain. What will you do with it? Will it make a new genus?”

The following year, Croom again wrote to Torrey in a letter dated 18 May 1836 that he had determined that the tree represented a new genus. He proposed the genus name Torreya and provided a description and habitat details for “this fine tree,” for which he remarked:

“It is so abundant about Aspalaga (especially on Flat Creek) as to have been sawed into plank and lumber. It is an elegant tree with dark green foliage.”

With this letter, Croom provided the first recorded description of the habitat and abundance of the Florida nutmeg, Torreya taxifolia.

Sadly, Croom and his family drowned in a shipwreck in the Atlantic Ocean near Cape Hatteras on 8 October 1837. As such, Torrey arranged that the new genus and species were formally named and described by botanist George Arnott Walker-Arnott in 1838.

While Croom characterized Torreya taxifolia as abundant in 1836, today the species is critically endangered. With a distribution restricted to the limestone ravines and bluffs along the Apalachicola River in northern Florida and southern Georgia, fewer than a thousand individual trees persist in their native habitat. The most significant threat to the species is continued reproductive failure resulting from fungal pathogens—a threat which is continuing but not well-understood.

Little Lake Valley, located in northern California’s Eel River watershed, is home to several thousand acres of wet meadows and riparian woodlands that are habitat for diverse plants and wildlife, including tule elk, many bird species, and gorgeous spring wildflower displays. A landscape formed when sediments from several creeks filled an intermountain valley bounded by faults, the Valley is also home to two rare plants: the North Coast semaphore grass (state-listed as Threatened) and Baker’s meadowfoam (state-listed as Rare).

“The large lowland wetland ecosystem found in the Little Lake Valley, if not unique, is quite rare,” asserts Dr. Robert E. Preston, a Senior Biologist in the Sacramento office of ICF, an international consulting firm. “Most or all of the small interior valleys of California’s North Coast Ranges were long ago converted to agriculture or were hydrologically altered. Moreover, it supports almost half of the known occurrences of Baker’s meadowfoam, including the largest and most extensive population.”

In November 2016, the California Department of Transportation (Caltrans) completed construction of the Willits Bypass Project, a 5.9-mile long bypass of US Highway 101 in Mendocino County. First proposed in 1957, the controversial project, which crosses a corner of Little Lake Valley, raised a variety of environmental concerns due to its impact on endangered species and state and federally regulated resources [1].

Preston served as the lead botanist for the team that prepared the Project’s Mitigation and Monitoring Plan, which was developed and is being implemented by Caltrans to offset the bypass’ impacts on wetlands and rare plants.

At the end of the twentieth century, the The Royal Botanic Gardens, Kew, The Harvard University Herbaria, and The Australian National Herbarium began collaboration on an ambitious project—to create an online index of names for all of the world’s vascular plants [1].

By combining the data in the nomenclatural indices of these three institutions—namely Index Kewensis, the Gray Card Index, and the Australian Plant Names Index—the collaboration created the International Plant Names Index (IPNI). Hosted by the Royal Botanic Gardens, Kew, today the database includes over 1.6 million records. As part of the provided nomenclatural information, IPNI includes bibliographic details linked to scanned literature in the Biodiversity Heritage Library (BHL) and links to taxonomic data through the Plants of the World Online.

Not surprisingly, given its role as a source of scanned literature for the Index, BHL is a vital resource for those working to build and maintain the IPNI database.

“I started working for the International Plant Names Index in 2013,” says Heather Lindon, Plant and Fungal Names Editor at the Royal Botanic Gardens, Kew . “I need to be able to look up protologues—the original place of publication of plant names and their descriptions. If the earliest place of publication isn’t known, we can use the name search in BHL to try to find it. Since our modern naming system dates to 1753, BHL has a lot of relevant literature for my work. Also, the rules of the International Code of Nomenclature that govern plant names apply to names published in the past, so consulting older works is still relevant for names being published today.”

Visit any major botanical research institute today and you’ll find a herbarium, or collection of preserved plant specimens. These specimens are used to identify plants, to track where and when particular plants grow, and to help understand how plants are influenced by climate change and other environmental factors.

Formal herbaria have been around for about five hundred years. The first recorded herbarium was created by Italian physician and botanist Luca Ghini in the early 1500s. Called a Hortus Siccus, or “dry garden”, the herbarium was populated by drying plants under pressure between pieces of paper and then mounting the specimens for study. Today, herbaria are integral to botanical research.

Dr. Maura Flannery, Professor Emerita of Biology at St. John’s University in New York and a Research Associate in the A.C. Moore Herbarium at the University of South Carolina – Columbia, studies the complex history of herbaria, their many uses, their digital future, and relationships between herbaria and botanical art. While she has been studying biology and its links to art over most of her career, Flannery’s interest in herbaria emerged about ten years ago.

Artist Marian Ellis Rowan depicts herself with botanist Alice Lounsberry collaborated to produce several botanical guidebooks. Their three guides are illustrated with pen and ink illustrations as well as full color paintings. Intended to make botanical study accessible for a popular audience, they take an ecological approach by organizing species according to where they habitually grow, from aquatic environments to dry sandy soils.