3 posts tagged with

Eucalyptus

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Autumn at the Royal Botanic Garden Edinburgh

Autumn is once again a receding memory, growing dimmer everyday as we continue the inexorable slide into the darkest depths of winter… But try hard enough and it’s still possible to cast our minds back to a time when the trees still had leaves; when warm shades of gold, orange and red coloured the landscape; when the mercury didn’t sit so low in the thermometer.

I moved up to Edinburgh from Sheffield at the end of September. (I lived here for the best part of four years previously, while I studied ecological science at the University of Edinburgh.) My flat is no more than a ten minute walk from the outstanding botanic gardens, which are one of my favourite things about living here. I paid the gardens three visits with my camera in one week soon after I moved in. How about some autumnal photographs then?


28th September 2013

This towering deodar (Cedrus deodara) grows close to the East Gate. It is a beautiful and imposing tree, one of the finest in the gardens.

Looking up into the hefty crown of the deodar - how many branches? How many growth points? What tonnage of timber?

A neighbouring big, old sweet chestnut (Castanea sativa) seems sadly to be in serious decline. The tree was rather sparsely foliated at the time of this visit, but at that point in the autumn natural leaf loss would have been premature. It’s a shame because it’s another fine tree. A major branch has a few old wounds on it, one of which sported a nice bit of fungus. It’ll be interesting to see how the tree looks in spring.

I came across these Pholiota squarrosa mushrooms growing at the base of a big European beech (Fagus sylvatica). They were also growing around the base of a nearby heartnut, a variant of the Japanese walnut (Juglans ailantifolia var. cordiformis). P. squarrosa is a parasitic white-rot fungus that attacks a wide range of host trees.

This mushroom was growing under a pine tree… …along with its wee pal.

This dawn redwood (Metasequoia glyptostroboides) in the Chinese Hillside part of the gardens was positively radiant. The needles - here so vibrantly illuminated - are now long gone, this being a deciduous species.


29th September 2013

This oak really stood out from the crowd!

A nice cider gum (Eucalyptus gunnii) growing in front of the 1960s glasshouses. At least this tree will keep its leaves all winter long.


3rd October 2013

Autumnal maple leaves.

On this visit I was quite keen to get some photos of the mushroom population. There weren’t so many of a big enough size to stand out as I strolled along, but if I just stopped for a moment to study the mulch that surrounds the base of every tree, there were far more mushrooms to be seen than most people would have realised. Perhaps these are waxcaps of some sort?

The distinctive spiny cupules of sweet chestnut. Apparently the nuts can’t attain their full size in the British climate, so the roasting chestnuts that appear in the shops for winter are imported from the continent. I had a bag of roast chestnuts at Edinburgh’s European Christmas Market last week – they were enormous and very tasty!

I’m fairly sure this is a hare’s foot inkcap (Coprinus lagopus). This mushroom is quite interesting; according to Wikipedia, “As the mushroom matures, the shape of the cap becomes more conical or convex, and finally flattens out, with edges curved upward. The veil is initially whitish, then turns to a silvery grey or grey-brown; it eventually splits up, becoming hairy (fibrillose). ... In maturity the gill edges dissolve (deliquesce) into a black liquid. These mushrooms are evanescent, lasting only last a few hours before death…”


Posted in Gone for a walk





Royal Botanic Garden Edinburgh (27th July 2008) Part 2: Assorted photographs

common lime inflorescence

Inflorescence on a common lime a.k.a. European linden (Tilia x europaea). The common lime is a hybrid of the small-leaved lime (Tilia cordata) and the large-leaved lime (Tilia platyphyllos).

cider gum

A cider gum (Eucalyptus gunnii) tree!

ribbon gum and cider gum

Two eucalypts in front of one of the glasshouses: another cider gum on the right, and in the background a ribbon gum a.k.a. manna gum (Eucalyptus viminalis).

cider gum foliage and seed pods

Cider gum foliage and seed pods. These are the ‘mature form’ leaves, as opposed to the ‘juvenile form’ leaves currently seen on treeblog’s own cider gums.

a grove of six giant sequoias

A grove of six giant sequoias a.k.a. Sierra redwood (Sequoiadendron giganteum). The largest tree in the world, General Sherman, is a giant sequoia.

large sweet chestnut tree

This sweet chestnut (Castanea sativa) tree has a massive trunk, which splits into three huge boughs.

looking up a large sweet chestnut bough

Looking up one of the huge boughs. I saw three different sweet chestnuts in the Garden and all were of massive girth. I bet they are easily some of the biggest trees in the collection.

sweet chestnut male flowers and developing cupules

Male sweet chestnut catkins in full bloom. The bright green spiny female parts will develop into the distinctive spiky cupules which each usually contain three chestnuts.


Posted in Gone for a walk





El Grande, Australia's largest tree, toppled

Poor old El Grande. Australia’s largest tree, killed through the folly of man, has been blown over in strong winds. The Herald Sun reports:

Standing at 79m [259 feet], the massive Eucalyptus regans - known as El Grande - stood unharmed by man for almost four centuries until the Forestry Tasmania burn-off went out of control.

..."This is the last chapter of a very sad story of mismanagement of our forests by Forestry Tasmania," Wilderness Society Tasmania campaign coordinator Geoff Law said. "Forestry Tasmania admitted killing the tree with a forestry burn in 2003. They would have cut it down in 2002 except the Wilderness Society blew the whistle on them.

…"It could have been an icon to the planet, but instead it has disappeared through incompetence."

Following the fatal burning, an inspection of El Grande was undertaken in April 2003 by the Wilderness Society. Some of the observations are quite amazing:

- The lower butt of the tree had been exposed for approximately ½ - 1 metre by a bulldozer or a similar machine. Some roots had been exposed and damaged.
- The fire had burnt to the tree and then had been drawing into the ground-level openings.
- The dry rot and wood inside the trunk had ignited and the configuration of draught holes at the base with outlet holes further up had acted like a furnace and chimney.
- The temperatures generated within the tree core mush [sic] have been extremely high, virtually "cooking" the tree from the inside-out!
- The external furnacing had extended to 60-65 metres where the flames appear to have exited from some hollow branches of this level. N.B. The charring is visible!

El Grande, although not the tallest tree in Australia, was the largest in terms of volume. According to gianttrees.com.au (managed by the Giant Trees Consultative Committee), El Grande had volume of 439 cubic metres and a diameter of 595 cm (234 inches). Alas, this champion Eucalyptus regnans, estimated to be 350 years old, is sadly no more.


Posted in Notable trees





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