In the early 1900s, two artists, Mary Page and Beatrice Carter, were employed by the Bolus Herbarium to illustrate a hugely diverse family of succulent plants, which are almost endemic to Southern Africa. Their delicate, precise and vividly coloured botanical drawings are now freely accessible online. View the Bolus Herbarium illustrations on the Digital Collections website.
The Bolus Herbarium is the oldest functioning herbarium in Africa and, for the Humanitec project, we chose to digitise a collection of watercolour paintings and drawings by botanical artists Mary Page and Beatrice Carter who were employed at the Bolus Herbarium in the early 1900s.
Both were trained artists who were employed especially to illustrate the Mesembs, a very diverse family of about 1800 species of succulents that are almost endemic to Southern Africa. The Bolus Herbarium has a very rich ‘type’ collection of Mesembs or Aizoaceae.
‘Once they are pressed, many of the Mesembs’ characteristics disappear. The brilliance of their flower colour gets lost, drying to brown. The structure and dimensionality of the plant is also difficult to detect… So they are better represented by botanical drawings.’
Botanical drawings and herbarium specimens are very closely linked. Descriptions of a new species usually went with a drawing. But once they are pressed, many of the Mesembs’ characteristics disappear. The brilliance of their flower colour gets lost, drying to brown. The structure and dimensionality of the plant is also difficult to detect, because (the usually succulent and juicy) plant has been squashed. Orchids are similar in this way. Once pressed, you can’t see anything anymore. With some other groups, it’s easier to take a dried and flattened herbarium specimen and resuscitate it in water – they tend to fatten up again. But with Mesembs it is very difficult to work with specimens, so they are better represented by botanical drawings.
‘Bolus’s grand passion was for plants and drawing – his special interest, orchids.’
The Bolus Herbarium and Library were started by Harry Bolus, a stockbroker, who made a lot of money on the stock market with diamond mines in Kimberley and grew to be one of the richest men in Cape Town. Interestingly, as a benefactor, he funded the studies of the Afrikaans poet, C Louis Leipoldt, who studied medicine at Guy’s Hospital in London and travelled in Europe, America and the East Indies.
But Bolus’s grand passion was for plants and drawing – his special interest, orchids. When he first came out to South Africa he settled in Graaff-Reinet, but after 19 years there, he moved to Cape Town. The Herbarium, which was established in 1865, was initially housed at his home in Kenilworth, before it was relocated to Hiddingh Campus, and later to the HW Pearson Building on UCT’s Upper Campus.
When Bolus died in 1911, he bequeathed both the Library and the Herbarium to the South African College (now UCT) – and made provision for a fund to establish a special research chair, the Harry Bolus Chair. The Library was especially valuable because there was no Internet at the time. Bolus recognised that you could only do botany with a library, so he had all these rare books brought to Africa. He sent people overseas to buy books, some of which date as far back as 300-years – and these now form part of the Bolus Library’s rare book collection.
His niece, Louisa Bolus, was set up as curator for life in the Herbarium. She was very interested in Mesembs, because it is such a diverse plant family, almost endemic to Southern Africa. A few species can be found in South America, Australia and the Mediterranean, but most of them are here. Of course, some people came to the Cape and took plants back with them, so they were described elsewhere. But most of the species were described here, many of them by Louisa Bolus
‘Both artists had illustrious careers as Bolus Herbarium artists and together produced more than 2 000 illustrations. Unlike commercial or decorative botanical drawings, these are proper taxonomical drawings – studies with a scientific purpose.’
Because these specimens preserved so badly, she employed Page and Carter to illustrate the Mesembs she was studying. Her descriptions were accompanied by their drawings, and her Latin and Greek studies, helped her to describe over a thousand species (to the pique of her two chief competitors in England and Germany). Up until recently, all descriptions had to be in Latin.
Both artists had illustrious careers as Bolus Herbarium artists and together produced more than 2 000 illustrations. Unlike commercial or decorative botanical drawings, where all the leaves and flowers are coloured in, these are proper taxonomical drawings – studies with a scientific purpose. Page and Carter only usually coloured in one leaf or flower, or even just a part of the flower, to show the colour of its petals.
There are such subtle variations in colour that a large horticultural chart is needed to indicate what each colour is called. The leaf colour changes and is also important for taxonomic purposes. Some are very green in colour, some are grey, while some have a slight roughness to their surface. This texture could be seen under a microscope as well, but Page and Carter showed this by magnifying the leaf in their drawing to illustrate that it was slightly sculpted.
The rest was drawn in pencil. Many are half-flower drawings, where the flower was cut in half to show its inside structure for taxonomic purposes.
‘Flower characteristics played a huge role then as the Linnaeus system was mainly based on flower differences. The flutes were not always shown, as they only became important from the 1940s onwards.’
Flower characteristics played a huge role then as the Linnaeus system was mainly based on flower differences. The fruits were not always shown, as they only became important from the 1940s onwards. The whole taxonomic classification of plants is based on floral morphology.
‘Digitisation makes these rare botanical drawings far more accessible. Anyone who works in the field, regardless of where in the world they are based, can now view the paintings. On-screen access also makes it possible to zoom in up to a certain magnification, make measurements, and see details of the flower, fruit or leaves.’
The drawings are currently stored as reference works together with the herbarium sheets with pressed specimens of the original plants from which the illustrations were produced – they were done hand in hand. They are highly regarded within the world of botanical illustrators and botanists. More than 3 300 original artworks have been scanned as part of the Humanitec project – each with its associated meta-data.
We began by digitising the ‘type’ specimens, as there has been a global drive toward the digitisation of African botanical ‘types’, but now many other additional drawings have been digitised too.
A ‘type’ is a specimen on which the description and name of a new plant species is based. These types are studied internationally and used to have to be mailed to researchers abroad. Having the images available digitally has cut down on the postal charges and administration required to send them. More importantly it protects the paintings, which are irreplaceable and were previously at risk of being stolen or damaged.
Digitisation makes these rare botanical drawings far more accessible. Anyone who works in the field, regardless of where in the world they are based, can now view the paintings. On-screen access also makes it possible to zoom in up to a certain magnification, make measurements, and see details of the flower, fruit or leaves. These are huge advantages.