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From year to year, many of the flowers in my garden are the same. Most are perennials, but there are also the annual and biennial self-seeders that have become established here. So each season has a familiar look, with perhaps a few recent additions or a few losses.
Something did manage to surprise me this summer – the unusually enlarged flower head of the wild carrot (Daucus carota) pictured above. This is the mixed deep-red to white variety ‘Dara’, which I sowed a few years ago. A biennial, it has been self-seeding here ever since. The shape of this particular flower has gone very much awry, perhaps due to disease or an attack by an insect.
The flower should be a simple umbel (a shape like the frame of an upturned umbrella), like the one shown below. If you look at the structure of it, you’ll see that the ‘umbrella frame’ of stems each end in a similar structure, but in miniature. (These are known as ‘umbellules’ or ‘umbellets’ and make up a ‘compound umbel’.) The normal flower in the picture below is in the process of opening into the flatter shape of the maturing flower head.

So what has happened to produce the strange flower head here? Somehow it has produced an extra ring of smaller umbels around the central umbel. Each of these has then gained a ring of umbellules on longer stems than usual, giving the appearance of being surrounded by tiny satellites. It is as if the instruction for growing into a normal flower have become corrupted and caused repeats in the flower’s structure. Whatever the cause, I’m intrigued by this flower and I’m wondering how it will develop. What will happen when it tries to fold into the ‘nest’ shape that the seed-heads normally become? If it survives long enough, I’ll let you know what happens… 🙂
You can see more pictures of how wild carrot normally looks and develops here.




















