Posts

Posted on

Competing for heirlooms

The Independent has launched the Great British Butterfly Hunt.

In the Great British Butterfly Hunt we will seek to find and report on each one of our 58 varieties (56 residents and two Continental migrants)… We will report from right across the country on every single species.

But most importantly we are inviting you, the readers, to join us, and to see how many you can observe for yourselves. As the different species emerge at different moments of the spring and summer, we will be offering extensive guidance on identification and on how to find them. Some may well be in your back garden or local park. Others, especially the rarities, may involve a journey – albeit to the most beautiful parts of Britain.

To give an edge to it all, we are introducing an element of competition, and an unusual prize.

The person or group (such as a school class) which records the most species will win a special safari in late August, conducted by The Independent in conjunction with the charity Butterfly Conservation, to find the last butterfly of the summer – the most elusive of all the British species: the brown hairstreak.

A nice idea. Would it work for heirloom fruits and vegetables, say? Or pollinator species for that matter. Jeremy says they tried it at the Henry Doubleday Research Association ten years ago without a great deal of success. Any other examples out there?

Posted on

A new use for tubers

A sharp knife is an essential element in the preparation of many vegetables, a fact as true 2 million years ago as it is today. Results from the recent meeting of the Paleoanthropology Society, reported in Science, indicate that the people who occupied the site of Kanjera South in Kenya carried stones that held an edge better from at least 13 kilometres away. Thomas Plummer of Queens College in New York and David Braun of the University of Cape Town found that a third of the stone tools at Kanjera came from elsewhere, and that these stones made longer-lasting knives than local material.

What were they using the knives for? To butcher animals, obviously, but also to cut grass and to process wild tubers. Cristina Lemorini of La Sapienza university here in Rome showed that the pattern of wear on the ancient tools matched the wear on modern stone tools used by the Hadza people of Tanzania to process plant material. In particular, using the stone knives to cut the underground storage tubers of wild plants left a pattern of grooves and scratches that was identical on modern and two-million year old stones.

Why tubers? There have been lots of theories about the role of plant tubers in the evolution of humanity, most of which hinge on the energy to be obtained from tubers, especially when times are hard. Margaret Schoeninger, of the University of California, San Diego, floated an intriguing new idea at the meeting. She noted that most of the tubers provide scant energy, and that modern Hadza chew on slices of tuber but don’t swallow the fibrous quid. Measurements show that panjuko (Ipomoea transvaalensis) and makaritako 1 can be up to 80% water. Schoeninger thinks that early humans used the tubers as portable canteens.

That might raise the question: why weren’t they domesticated? That’s an unanswerable hypothetical, but the simple answer might be that there was just no need to.

Posted on

Featured: Baroque maize

Eliseu on the portrayal of maize peduncles in a baroque painting:

I think the peduncles are only to give a prominent look to the maize cobs and are the artist’s free interpretation of nature. However, I’ve seen maize cobs with long peduncles, so long that the ears would be pointing downwards, but didn’t look that straight, though!

Posted on

Baroque painting celebrates agrobiodiversity

I did not expect much agrobiodiversity in the Victoria & Albert’s exhibition on the baroque. But I found some anyway, in the mid-17th century Flemish oil painting Flower Garland with the Holy Sacrament and an Angel’s Head, possibly by Daniel Seghers (1590-1661). It’s reproduced below, but you can consult a better image on Flickr.

maize

It looks to me that what I’ve marked are maize cobs, although the one on the right could, I suppose, be sorghum. If they are maize, it is interesting that they seem to show three distinct varieties. There’s variation in the other cereals too. I guess it goes with the general exuberance of the baroque. But what’s with those peduncles?

Posted on

Farmers’ market fails to market diversity

Wandering around London on Friday, we came across the Pimlico Road Farmers’ Market. A couple of dozen stall selling everything from fruits and vegetables to cheese to all kinds of meat products, mostly sourced locally, meaning within 100 miles of the M25, the motorway that goes all the way around London. Friendly people. Beautiful produce, beautifully displayed. All impeccably organically certified — signs to that effect were everywhere. Made artisanally, naturally, according to traditions which no doubt trace their origins back to the mist-shrouded times of, well, the last Tory government, probably. And yet, and yet…

Apart from one stall selling tomatoes

tomato

and another one selling apples and apple products

apple

there was really no indication that agrobiodiversity was in any way valued, either by the sellers or buyers.

None of the stalls had more than one or two varieties of any of the fruits and vegetables on display. Ok, I thought, fair enough, we’re not dealing with a huge catchment area. But there was not even any mention of variety names on the labels. Maybe they’re all rather boring commercial cultivars and breeds, and the stall owners don’t want to draw attention to that fact. The European Union doesn’t make it particularly easy to grow heirlooms, as we’ve pointed out here before. And indeed a brief chat with a couple of stall holders did in fact reveal that none of the veggies on display were particularly noteworthy local varieties. Pity. It seems that the fact that produce is organically grown is an immeasurably more important selling point than its status as an ancient landrace, at least in this market in an affluent part of London, which I found surprising. I wonder if some enterprising student is making a study of all such markets across London.

Excellent pork pies though.