Posts Tagged ‘aphids’

Francis Walker’s Aphids, John P. Doncaster (British Museum 1961)

Is this a candidate for Russell Ash’s and Brian Lake’s classic collectors’ guide Bizarre Books (1985)? Yes, I’d say so. It’s not as outré or eccentric as Who’s Who in Barbed Wire (“Containing ‘Names and addresses of active barbed wire collectors’”) or Walled Up Nuns and Nuns Walled In (“With Twenty Illustrations”), but few books are. I’ve certainly never seen a book about aphidology before.

I didn’t even know the word existed. Do aphids deserve a discipline of their own? I’ll let Thomas Aquinas answer that:

[C]ognitio nostra est adeo debilis quod nullus philosophus potuit unquam perfecte investigare naturam unius muscæ: unde legitur, quod unus philosophus fuit triginta annis in solitudine, ut cognosceret naturam apis. – Expositio in Symbolum Apostolorum (1273).

Our understanding is so weak that no philosopher can understand the nature of a single fly; whence it is read, that one philosopher was thirty years in the wilderness, that he might understand the nature of the bee.

For apis read aphis. The philosophus in this case may have begun his obsession like this:

Francis Walker seems first to have turned his attention to the study of aphids in the autumn of 1846 when he observed them swarming and ovipositing on furze. In the summer and autumn of the following year he made copious and systematic collections of such species as he could find in the neighbourhood of his home in Southgate, at that time a country town a few miles north of London. (“Walker’s Aphid Studies”, pg. 1)

Walker was employed as an entomologist at the British Museum and this book is an attempt to analyse what he collected and named. It’s very detailed and might seem very dry. But there’s a lot of food for the historic imagination in descriptions like this:

Aphis particeps Walker = Myzus persicae (Sulzer)

1848 Zoologist, 6, 2217.

1852 List Homopt. Ins. Brit. Mus., 4, 1011.

Collected with four other species from Cynoglossum officinale near Fleetwood, Lancashire, in October, and described as follows:

The wingless viviparous female. The body is pale brown, small, oval, shining, and rather flat; the antennae are pale yellow and longer than the body; the rostrum is pale yellow; its tip and the eyes are black: the tubes are pale yellow and rather more than one-fourth of the length of the body; the legs are pale yellow; the tips of the tarsi are black. (pg. 103)

Cynoglossum officinale is a purple-flowered, sand-growing wildflower whose common name is hound’s-tongue. The officinale of its specific name is a reference to its use in herbal medicine. In Anglo-Saxon times and the Middle Ages, herbalists or magicians would have been picking its leaves; in the nineteenth century, a scientist called Francis Walker was picking aphids off it.

There’s a vignette like that with many of the other descriptions, as Walker simultaneously collects aphids and moments of his own life. I think he must have been an odd and obsessive man, but he had colleagues, even although aphidology can never have been a crowded profession. The description for “Aphis bufo Walker = Iziphya bufo (Walker)” notes that this species was

Found in the beginning of October by the sea-shore near Fleetwood [Lancashire] on Lycopsis arvensis, the small bugloss; also by Mr. Hardy near Newcastle on Carex arenaria, sand reed, and by Mr. Haliday near Belfast. (pg. 37)

Were Walker, Hardy and Haliday rivals as much as colleagues? I like the idea of obsessive aphidologists racing each other to find and record new species. Francis Walker could have been a character in a story by Arthur Conan Doyle or H.G. Wells. Ernest Rutherford is said to have divided science into two branches: physics and stamp-collecting. That’s unfair, but aphidology and other branches of entomology and natural history are like subtler and stranger forms of stamp-collecting.

The similarities were stronger in Victorian times, before biology began to merge with chemistry and mathematics. Indeed, Walker began his collecting well before Darwin published The Origin of Species (1859) and perhaps he didn’t like the new science. The preface to this book notes that “Walker’s name has come to be a by-word among insect taxonomists for his inaccuracy and superficiality”, but praises him for making a “significant and important advance in aphidological knowledge” and says that his “catalogues and lists formed the nucleus [of] the vast collections of today”.

“Today” was 1961, but this is a very neat and well-printed book in a solid green binding. I hope Francis Walker would have been pleased by it and by the thought that he’s inspired someone in the twenty-first century to look at aphids with new interest and wonder.

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Flora by Sandra KnappFlora: An Artistic Voyage through the World of Plants, Sandra Knapp (Natural History Museum 2014)

There’s a phantom at this floral feast: photography. How much did we lose when it became easy to capture accurate images of the world with a camera? How much do we continue to lose? The botanical drawings and paintings here are almost sacramental in their intensity: beautiful natural objects receive the care and attention they deserve. Wordsworth said this: “To me the meanest flower that blows can give | Thoughts that do often lie too deep for tears.”

The artists represented here understood what he meant. So does Sandra Knapp, the botanist who collects and commentates their art in this beautiful book. She complements it with serious science too as she discusses twenty broad groups of plants, from arums and water-lilies to palms and grasses, from daffodils and poppies to roses and morning-glories. Tulips too, whose vivid patterns are produced in an unusual way:

Lilium suffureum (1936) by Lilian Snelling

Lilium suffureum (1936) by Lilian Snelling

The fantastic red and purple feathers and flames that appear as if by magic on tulips are not the result of man’s interference with nature, but are a viral disease transmitted by aphids. […] There are many varied viral diseases of plants, but tulip-breaking virus is the only one known to increase the infected plants’ value. Tulip plants infected by tulip-breaking virus have blotchy, mottled leaves and intricate and finely patterned petals, and appear as if hand-painted in pure colour. The variegated effect is caused by interference of the virus in the plant’s production of anthocyanins (pigments responsible for producing the reds and blues of flowers), without which the background colour shows through, pure white or yellow. (“Tulips”, pg. 294)

Tulipa cultiva (1900s) by J.J. Hormann

Tulipa cultiva (1900s) by J.J. Hormann

But this book isn’t just about colourful and scented plants: it also covers conifers, with their odd and interesting cones. They include some of the largest plants on earth, like Sequoiadendron giganteum, the giant redwood. The heathers, on the other hand, are often tiny and easy to overlook, but they can introduce some big themes:

There are more than 750 species of Erica in South Africa – with the proteas and restionads, they are one of the three main constituents of fynbos, the characteristic and wonderful vegetation of the Cape region. The Cape fynbos [Afrikaans for “fine bush”] has been described as a wonder of the world, a statement with which it is impossible to disagree. Imagine an area the size of Portugal or the state of Virginia with more than 8000 native species of flowering plants, more than half of which are endemic (found nowhere else on earth). (“Heathers”, pg. 255)

Flora is a fynboek, a “fine book”. Serious science, enchanting images, and literary quotes that range from Robert Burns and Ovid to Frank L. Baum and Zhu Pu: Sandra Knapp has combed archives, combined disciplines and created something worthy of its beautiful subjects.

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