So much, much more than a weed

According to self-described “cultivator” David Randall in The Independent, it’s going to be a bumper year for dandelions in the UK.

Yet not everyone is clapping their hands with glee. According to reports in less ecologically sensitive newspapers, keen gardeners and lawn obsessives see dandelions as trouble, blemishes to their idea of contrived perfection, the removal of whose deep taproots can rick the sturdiest of backs. To them, dandelions are the enemy, insurgent forces of nature, forever pushing aside the “real” garden flowers, and taking over. They are thus condemned, in that most loaded of horticultural terms, as “weeds”.

This word, to those of us who have been gardening with dandelions for years, is not only wrong, but hurtful. Taraxacum officinale, as we cultivators call it, is a much undervalued addition to any plot. Not only do its golden rosettes brighten the dingiest corner, but you can use it to construct a salad, make an acceptable table wine, or even, when it runs to seed, tell the time. And you can’t say that about all those bloody purple alliums of which Chelsea’s show gardeners are so fond.

Quite right. Dandelions have a long history of use in medicine, yes, but also food. Although they do take some preparation. And of course there’s wine too. All this, plus an interesting taxonomy, and an endangered endemic relative. What more can you ask for? Weed indeed.

Self-irrigating desert rhubarb

Rhubarb is a pretty interesting crop, with its steppe origins and medicinal properties and colourful appearance. But not nearly as interesting as one of its wild relatives. Plants of the desert rhubarb (Rheum palaestinum) growing in the Negev Desert have just been shown to “typically harvests 4.2 litres of water each year, while the largest plant found harvested 43.8 litres.” That’s in an area which gets 75mm of rain a year. It’s all due to the its “specially designed leaves that channel rain water to its roots.” No word on its crossability with Rheum x hybridum (R. palmatum x rhaponticum) Murray, but I’m sure it will be tried. Drought-resistant rhubarb crumble, anyone?

Agricultural biodiversity weblogger awarded prize

Our friend, colleague and occasional contributor Andy Jarvis has just won GBIF’s prestigious Ebbe Nielsen Prize for 2009 for “combining biosystematics and biodiversity informatics research in an exciting and novel way”. A lot of his work has been on the spatial analysis of the geographic distributions of crop wild relatives, with a view to developing strategies and priorities for their conservation, in particular in the context of climate change. A lot, but far from all: Andy is nothing if not versatile, and his interests extend to the whole of agrobiodiversity. A recent interview with Andy, and others, tries to answer the question “why maps?”. Congratulations to Andy!

The slow march of domestication

Kris’s Archaeology Blog at About.com has a short post summarizing recent work which suggests that there may have been a gap of a millennium between domestication of, and dependence on, broomcorn millet (Panicum miliaceum) in China — and similar gaps for a number of other crops in different centres of origin.

What this is telling us, is that hunter-gatherers took the initial steps towards farming many generations before their descendants became dependent on domestic crops. Interesting, don’t you think?

Indeed.