Survey of Flowering Plants Stored in Fluid Preservatives Across European Herbaria

Written by Ranee Prakash, Senior Curator (Flowering Plants), Algae, Fungi and Plants Division, Department of Life Sciences, Natural History Museum, London.

A survey of flowering plant material stored in various fluid preservatives across several European herbaria/institutions was carried out a few years ago. The feedback received from the survey is shared and shows that the majority of the herbaria use 70% IMS (industrial methylated spirit) to store their collections.

Introduction

The seed plant collections (stored in various liquids such as formalin, some have unknown liquids, and some mention poison) form a relatively small yet significant part of the botanical holdings at NHM (Natural History Museum). They include some important material dating back to the mid 1800’s and type collections such as the world’s largest flower Rafflesia arnoldii collected by Robert Brown. However, these wet collections have remained a somewhat underused asset and are in dire need of curatorial attention.

In continuation to this aim, a survey of flowering plants stored in spirit collections across various institutions in Europe was carried out in 2012 so as to assess what preservatives other institutions were using and what would be the best method to store the collections at NHM for posterity. The objective of this survey was to gather information on:

  • How big the spirit collection is
  • How the collection is used
  • Which liquid preservatives the flowering plant collections are stored in

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Stories from Pressed Plant Books in the Botany Collections

Written by Katherine Slade, Curator: Botany (Lower Plants), Amgueddfa Cymru – National Museum Wales (AC-NMW)

This article was first published as a blog for AC-NMW, 17 May 2019.

Within Amgueddfa Cymru’s botany collections are books of dried plant specimens created by scientists and enthusiasts. Each specimen has been carefully dried and pressed, before being added to the books, sometimes with handwritten or printed notes alongside. The books are of enormous importance both in terms of modern scientific research into climate change and biodiversity, and as a way to see first hand the history of botanical exploration.

You can now look through a catalogue of the 36 books that contain non-flowering plants, fungi, lichens and seaweeds. You can read about a few of the stories surrounding these books below. For more detailed information about each book, please visit the website.

These books show the changes in how we collect, classify and name plants over two centuries from 1800 to present day. An old volume which probably dates from the 19th century entitled “New Zealand Mosses”, contains more than just mosses. Lichens, algae and even some pressed hydrozoans (tiny marine animals) have been included by the unknown collector who chose to group these superficially similar ‘moss-like’ specimens together. This donation entered the Museum’s collections after its Royal Charter was received and before work had begun on the present Cathays Park building.

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Brendel Plant Model Survey

Written by Donna Young, Curator of Herbarium, World Museum, National Museums Liverpool

Inspired by the project led by the Corning Museum of Glass, which looked at holdings of Blaschka models, I am embarking on a project to map and document collections of Brendel botanical models worldwide.

The objective of this project is not only to provide a useful resource to be used in the curation of anatomical models, but to document their past and present use – promoting and bringing awareness of these collections to new audiences.

Brendel model Papaver rhoeas
© National Museums Liverpool, World Museum

Anatomical Models

The nineteenth century was the golden age of scientific discovery, and as the century progressed, the teaching of science in schools, academies and museums evolved to reach a new mass public audience. Science was no longer the exclusive preserve of an elite few.

Changing teaching techniques promoted this transformation and pedagogical inquiry was seen as a constructive and involved way of learning. The written and spoken word was supported by the use of visually instructive wall charts and classroom demonstrations. The introduction of interactive teaching models encouraged audiences to understand nature using new and original perspectives.

Botanical models were used to illustrate and demonstrate plant anatomy. Unlike living material, their use was not restricted by seasonal availability and they were ideal for demonstrating small or ephemeral details which are difficult to preserve.

In 1827 Louis Auzoux established his workshop in France, manufacturing human and veterinary anatomical models from papier-mâché. The company also produced botanical models, which were widely distributed to universities and schools in France, particularly to support the expansion in teaching agricultural science.

Brendel model Centaurea cyanus ‘dissected’
© National Museums Liverpool, World Museum

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Wild About Portsmouth – Discovering and Uncovering a Little Known Natural History Collection

Written by Christine Taylor, Curator of Natural History, Portsmouth Museums

Wild about Portsmouth is a two-year Heritage Lottery Funded project to share and raise the profile of the city’s natural history collections.  In addition to enabling visitors to get more hands on with the collections through events and activities, work is being carried out to make them more accessible for museum staff and researchers.

Challenges

The collections are held at three sites across the city and housed in environmentally controlled stores with many specimens held in archival quality boxes. However, the absence of a natural history curator for over 10 years has led to a series of challenges with accessing them:

Little Knowledge of Collections

Apart from the sizeable and substantial HLF Guermonprez Collection transferred from Bognor Regis Museum in the 1970s, very little was known about the collectors associated with the remainder of the natural history collections. In-depth knowledge of the HLF Guermonprez Collection has also been lost over time, although it is occasionally cited in publications by Sussex naturalists.

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“My Work Is What Will Survive”

Written by Mandeep Matharu, Yvette Harvey & Matthew Biggs.

These were the words of one of the pioneering plant cytologists, E. K. Janaki Ammal, who worked at the Royal Horticultural Society (RHS) Garden Wisley from 1946-51, and was their first female scientist. She studied the chromosomes of a wide variety of plants from magnolias to eggplants and sugarcane in addition to medicinal plants, leaving numerous scientific papers, herbarium specimens, and a large number of small, round-headed Magnolia on Wisley’s Battleston hill (Gardiner, 2012), including one bearing the name M. kobus ‘Janaki Ammal’, a vigorous, multi-stemmed tree, over 6m tall and wide, producing masses of white flowers over several weeks of Spring (Biggs, 2018).

Although Janaki’s life is documented within a small number of articles about her and her work, very little has been reported about her years at the RHS and we attempt to rectify that here.

Magnolia kobus at the RHS ©RHS

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Five Lessons for Life from Working on the Horniman’s Historical Herbarium

Written by Imogen Crarer during a student placement at the Horniman Museum and Gardens early last year. Imogen recently graduated from King’s College, London with an MA in Modern History with Distinction and is currently training as a curator at the Museum of Cornish Life.

You may think that I have taken slight leave of my senses or perhaps am being a pinch too ambitious in claiming that the Horniman’s historical botany collection is the source of 5 significant life lessons. However, “Yes! To science and history but also yes to life!” is my cheerful reply. Instead of dancing away merrily in a fit of musical theatre style exuberance, I shall explain how my student placement with the Natural History department researching the Herbarium gave me such insight.

Life Lesson Number 1: Often, the Simple or Basic Tasks are the Most Important.

Everything starts somewhere. My time at the Horniman highlighted that research processes and the museum journey of cataloguing, conserving and interpreting specimens for scholarly and public benefit has to begin with the basic “’ello ‘ello, what have we here?”. In my case, what we had were unbound volumes of Flora Britannica- physical specimens attached to annotated sheets collected mostly within the 1840s.

Having never previously been catalogued, the data from the handwritten labels on these specimens needed entering into the Horniman’s Collections Management System, Mimsy XG. Recording information on the database, such as scientific name, locality, and date collected, allows Horniman staff, volunteers and future researchers to know what is in the herbarium and explore its significance without having to disturb the specimens. While handy for convenience, it also helps us to conserve the specimens as repeated handling can damage these fragile, and beautiful, preserved plants. However it soon became apparent that the basic task of deciphering the handwriting and researching historical localities and common names was time-consuming, frustrating but also very rewarding. Transcribing the data from the specimens onto the database, I felt was my most useful contribution to the Horniman, and therefore my biggest achievement. It reminded me that taking the time to give yourself a solid foundation helps in anything that you do!

The collections management database used by the Horniman Museum; Mimsy XG. © Horniman Museum and Gardens.

Life Lesson Number 2: Little Things can Tell us a Great Deal.

The 175+ year old botanical specimens preserved in the herbaria have both historical and scientific significance. The specimens vary in size from approximately 2 cm to 30 cm in length, and the detail of delicate moss spores, flower buds, and leaf structures for example is wonderful. The specimen sheets tell us about the plants themselves. They also reveal a snapshot of the English countryside in the 1840s, particularly around Thame, Oxfordshire. Knowing the historical what, when and where allows us to make comparisons with current ecological data. This helps us to understand if and how plant species have spread or declined. This is particularly important for meadow flowers (represented strongly in the volumes I was working on) given that 97% of British meadows have been lost since 1945[1]. I feel that the Horniman’s historical botany collection and the present drive to conserve Britain’s green spaces and limit climate change, habitat destruction and pollution are much more linked than we might think.

One of a number of unbound herbaria held in the collections. © Horniman Museum and Gardens.

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Transforming Scientific Natural History 3D Data into an Immersive Interactive Exhibition Experience

Interspectral is a Swedish company that provides an interactive exhibition system called Inside Explorer using 3D volumetric scanning, such as CT and micro CT, real-time graphics visualisation and a large touch table to enable gallery visitors to interactively explore natural history subjects using modern science techniques.

Inside Explorer is today used at museums worldwide, for example the British Museum, Natural History Museum London, Utah Natural History Museum, Denver Museum of Science and Nature and many more.

A recent collaboration between Interspectral and Wakehurst; Kew’s wild botanic garden for their Millennium Seed Bank Visitor Atrium, has resulted in some spectacular results. These can be seen in the specially commissioned Secret Structures exhibition. The Inside Explorer system at the exhibition enables visitors to the Millennium Seed Bank to not only marvel at plants, but to learn from them and to understand our need to protect them. The Inside Explorer Digital Table invites them to peel back the layers of intriguing, scanned objects from RBG Kew’s collections; a Brazil nut, a piece of oak, an orchid and a carved walnut shell.

© Kew Gardens

Wakehurst and Interspectral worked with London’s Natural History Museum’s imaging labs to micro CT scan the subjects for the exhibits. These were then produced for exhibition by Interspectral and Wakehurst.

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