Today I noticed that some leaves on the wild privet (Ligustrum vulgare) that grows, bird sown, in the north west corner of The Green Sanctuary had several leaves with brown ends. The brown, dead part was differentiated from the rest of the leaf by a purplish semi circle and, on closer examination indoors, many spore-bearing pustules were seen on this band and across the rest of the underside of the leaf.
I was scrutinising the top of Butterfly Rock today when I noticed a small green patch different from the surrounding mosses. On closer inspection it was clearly a liverwort, lower plants closely related to mosses but with a number of rather variable distinguishing features. Once one is familiar with a few species it is quite easy to distinguish them from mosses.
My liverwort looks like bifid crestwort (Lophocolea bidentata) a very common and widespread species that grows both on wood and rocks though I have not seen one in the Green Sanctuary for 17 years. It is one of several strongly aromatic liverworts and I wonder what the purpose of evolving scent was. There are various insecst that live in and on liverworts, but the plants would hardly want to attract those creatures that are inclined to eat them..
In windy weather such as we have had today, I always enjoy watching the large birch tree in the Square Metre as it rocks backwards and forwards. As well as sap drips, unopened catkins have landed all over the ground beneath and the twigs that come down too seem to be quite fragile, though the tree in general seems to be scarcely damaged. Around the bottom of the trunk the ground moves as the tree sways and it is a marvel that the roots can hold the whole overground tree upright. I don't know the volume of the birch but it must be at least a cubic ton. The ground doesn't sink as this, or any other, tree grows, so I take it that virtually all its substance comes from the atmosphere. The picture below shows the base of the trunk. Note the climbing ivy showing a preference for the rough, dark bark.
Turning a little warmer with some nice sunshine on my back. The large birch tree was dripping sap again and I noticed that some of the Muscid flies including the greenbottle Eudasyphora cyanella and a Phaonia species were seeking out splashed leaves and feeding from them. As well as liquid, the birch sap must contain a variety of nutrients so feeding on the splash marks makes good sense at a time when other food sources might be few.
I have put an old cherry log near Pork Pie Pond, a place where I can easily keep an eye on it from my bench. This is partly to see if any fungi or invertebrates patronise it, but also because birds will perch on it. If it works like Butterfly Rock their droppings may contain seeds that wash down to the base of the log to flourish in the well-fertilised soil there. In windy weather caterpillars may be blown down from the large birch and climb up the log which they have mistaken for the birch trunk. Looking on top of fence posts near tall trees in windy weather often presents interesting larvae.
Today I was inspecting the log with my close focus binoculars when I spotted two tiny (about 1mm) cream coloured blobs on one of the cut ends. They might be the droppings of some passing insect In the photograph above apart from the blobs there are some tine white spots in a roughly rectangular shape lower down and towards the right. These might be sporophores of a slime mould or just random motes from the wind. Taking close up photographs of wild bits and pieces often reveals things like this not easily seen with the naked eye.
The western dandelion is now accompanied by at least two others that were seedlings last year. They grew slowly during summer and autumn but have speeded up during the colder months and may flower this year. However, on my visit on 11 March I discovered that abut half the leaves had been eaten, possibly by rabbits or deer. I think they will recover.
Still cold but signs of spring continue to appear. On some of the seedling hawthorns there are buds breaking with bright green leaves. There is a scatter of recently germinated seedlings on patches of bare earth. Birds, particularly blackbirds, peck over the fallen leaves and today had managed to bury the eastern dandelion completely. The eastern dandelion is having to compete with a young lords-and-ladies (Arum maculatum) which is, not surprisingly, larger than it was last year. The birch tree continues to drip sap creating small splash sounds easily heard in these quiet days of Covid lockdown (though the children have gone back to school today, putting more traffic on the roads.
One of the things I enjoy least are cold spells in spring. With the arrival of February some days of warmth happen. Primroses, crocuses and daffodils flower, snowdrops are fading. Then - bang! – the wind turns round to the north and a huge cloud-hung blanket of arctic air descends from the Polar Vortex or some other extreme weather circumstance at the top of the world. Venturing forth in such conditions means the heaviest of clothes, fully drawn down hats and fingers frozen in the wind or from touching cold surfaces. Precocious plants wilt, frost stricken and the black branches of winter trees rattle their twigs in the icy blast. As one’s spirit sinks, the thought slinks into the brain that this might last for many weeks: March will go by, April get started and weather forecasts will still talk of late frosts and warn that “it is turning colder”.
With these grey thoughts I walked down to The Square Metre
in my slippers and gazed glumly at the winter flattened grass and leafless
trees and shrubs with unbelief that the great summer resurgence is only a few
weeks away. But in my mind the chill was
mitigated and the grey thoughts dimmed by the knowledge that the sunshine will
come back with added strength, growth will resume and my spirits will return to
a more acceptable place.
Rather cold (9 degrees at midday) and with a thin mist everywhere. I only made a quick visit to Emthree, but rediscovered the wild privet in Medlar Wood though it is well hidden in a tangle of tutsan and brambles. The second privet is also doing well in the north east corner of the area but neither plant grows very quickly.
Looking back through past entries in early March, I noted that rabbits used to eat the pendulous sedge plant in Medlar Wood. It does not seem to have suffered that fate this year, though it woulkd grow better if it had a little more light.
Today I spotted a small tuft of oakmoss, Evernia prunastri, one of the commonest and more easily identified lichens on a slender twig of the birch that I could just about reach. Oakmoss is important in perfumery and has a large range of other uses. One of its distinctive features is that the branches are paler underneath than on the upper side.
On looking at it under the microscope I noticed a much smaller greenish granular species dotted with dark fruit bodies. It ran down to Fuscidea lightfootii in all my sources of information. There were two further species on the small piece of twig I brought indoors: one with a very thin, greyish thallus and very few fruit bodies and another dark brown, very visceral-looking species that might be a Melanelixia. The twigs were also heavily dusted with a green alga, probably a Desmococcus species.
The day after I discovered some beautifully patterned lichens on the smooth bark of the still standing pole of the dead ash. These were readily identifiable as Arthonia radiata, another widespread species. There was a second species with a very thin, grey and formless thallus scattered with rather few fruit bodies that will need further work to attempt an identification. A good place to start with these is the Natural History Museum's publication Key to lichens on twigs. This is also an online key A Key to Common Lichens on Twigs in the Key to Nature series: https://tinyurl.com/2rzkjj53
My dandelions seemed to have disappeared during the winter. Perhaps just covered in leaves, though they also lost there late summer leaves. The more easterly of the two now has several healthy, but unusually narrow, leaves spread starfish-like on the ground. It looks as though some animal has had a nibble at the centre of the crown.
Some oak leaves buckle as they dry in the sun, making a small clicking sound.
Sap is rising and there were glistening caps of liquid on the coppiced twig ends of the hornbeam cordon. Sap also fell from the birch in occasional drops and the twigs would bleed if cut.
Deep purple twigs that have blown down in winter storms are lying all over the Green Sanctuary - almost a protective net.
Yesterday I saw a small bird (chiff chaff or willow warbler) ferreting around the area. Maybe a new arrival or an overwintered bird. It seemed particularly interested in the box bush. Today I saw a wren and a robin while there were two hedge sparrows playing catch-me-if-you-can in the medlar.
Also yesterday I scraped some of the black patch that covers Butterfly Rock where it is bare of moss. I could discern no particular structure when I looked at it down the microscope later and it maybe that the sandstone itself turns black naturally if kept moist much of the time. I have put it in on damp blotting paper in a small plastic container to see if it 'develops' in any way.
The wild onion bulbs have mostly divided underground and have produced many thin, sea green 'chives' over the last few weeks.. 'Is there such a thing as a chive I wondered and in modern culture there is a verb 'to chive', e.g. Keep Calm and Chive On (KCCO). 'Chive on' seems to be a bit like 'rock on'.
I started to look at lichens..
The cold weather from the east brought frost and snow to the Square Metre in mid-February but most of the snow had gone by 14th or 15th of the month.
Last August I was examining the sallow cordon (Salix cinerea) that has been growing in the south west corner of the Square Metre for many years when I spotted a strange brown creature on one of the leaves. To begin with I couldn't work out what it was.
The 25th February is celebrated as Plum Blossom Day in many parts of Japan and, right on cue, a few delicate white flowers have appeared on the scrubby cherry plum bushes in our garden not far from the Square Metre.
As well as bringing on early flowers, the warm weather is encouraging insects to appear. A seven-spot ladybird was sunning itself in Brambly Hedge and several bumble bees zoomed through the Square Metre air space. One settled among the dead leaves and ivy and remained there once it was well tucked in. It looked too small for a queen (most early flying bumble bees are queens) and I suspect it was a worker that had managed to overwinter.
Several small cotoneasters have appeared in Medlar Wood over the years, the seeds, no doubt, occurring in droppings from the branches overhead. Last year one of the largest produced flowers and fruit and, using all the botanical resources I could, find it appears to be Cotoneaster franchetii, Franchet's cotoneaster. My plant shed its leaves quite rapidly in autumn and C. franchetii is said to be evergreen or semi-evergreen. The leaves also turned a quite vivid red. The indicates it could be var. sternianus introduced from Myanmar in 1919, a variety sometimes misnamed as C. wardii. It has been given an Award of Garden Merit (AGM) by the Royal Horticultural Society.
Now winter seems to have passed and we are getting some sunny February days. The corona virus pandemic seems to be receding too, so spirits are rising. Today I re-found the two older dandelion plants I spent so much time enjoying last year. They have been hidden under fallen leaves and worm casts for months. They are currently quite small with very narrow leaves, each from a single rosette, but they look healthy enough.
I have pushed the quill end into the ground by the self-heal near my feet where I sit and I intend to watch its deterioration (or disappearance). I have a book somewhere which includes details of microfungi that grow on feathers. So far I have not been able to find any of these so perhaps my pigeon's feather will fill this gap.
Although insects are rather few at the moment, the list continues to grow and the other day I photographed this horse fly (Tabanus bromius I think) resting on a leaf in Brambly Hedge.
