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Image of the day – 180
What’s in an image? Sometimes quite a lot, more than meets the eye. I’m posting an image every few days.
These autumn leaves are on a purple Cotinus coggygria bush, common name ‘smokebush’. Like many trees and shrubs at this time of year, Cotinus leaves change colour in autumn before falling to the ground. The shrub will produce fresh, new leaves in the spring. But look more closely and you may see something else.
The leaves in the image have developed interveinal patches of necrotic tissue, making the plant even more striking in autumn. I had never noticed this condition before moving to Cirencester, but there’s a Cotinus in the grounds of the Stratton House Hotel and Spa that does this annually. The shrub seems healthy in the spring and summer. For a week or two at the end of October this patterned necrosis makes the autumn leaves look even more spectacular.
Irregularities of this kind are common in both animate and inanimate natural systems and not infrequently appear as deliberate ‘enhancements’. Here are one or two notable examples:
- Leaf variegation – Gardeners and plant breeders select and propagate from stable variegations. Normally plants with variegation grow more slowly because the efficiency of photosynthesis is compromised.
- Petal doubling – This make flowers more showy, but often at the cost of the ‘doubled’ flowers being less interesting to pollinating insects. The additional petals may be modified stamens so less pollen is produced. Compare a wild rose to a garden rose and you’ll see what I mean. How often do you see bees working garden roses?
- Variations in animal characteristics – amongst cats and dogs (and also budgerigars, canaries, parrots and chickens you’ll see size and shape changes as well as behavioural, colour and pattern modifications. Compare a Jack Russell with a retriever or a blue budgie with a green one and you’ll find plenty of differences to ponder.
- Frost hardiness in plants. Frost sensitive species cannot survive winter in temperate or arctic conditions, so hardiness is a prized feature of many garden plants, and plant breeders pay attention to things like this. A Dahlia or Chrysanthemum that can flower for an extra week or two in the autumn may be worth a higher price, for example.
- Fruit colour and flavour components. These days strawberries are much larger than when I was child, and they are often red inside, not just on the outer surface.
Many variations of this kind are deliberately selected for by plant and animal breeders.
Certain other changes have been caused deliberately, even in humans. Lower lip enlargement, neck ringing to generate extended neck length, foot binding, and forms of male and female circumcision have been required for a variety of religious and cultural reasons. Hair styling, removal, or transplantation, piercing of ears, noses and other body parts are common, and don’t forget tattooing. And in plants; pruning, clipping, or bonsai are widely employed.
In the world of rock and stone, coloured and uncoloured crystals may be prized as jewels and fetch fantastic prices. I wrote about an example of this, a geode I spotted in an ordinary, traditional, Cotswold dry stone wall.
See also:
- Body piercing – Wikipedia
- Foot binding – Wikipedia
- Plant breeding – Journeys of heart and mind
- Plant breeding – Wikipedia
- Tattoo – Wikipedia
- Variegation – Wikipedia
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