Interesting Biomechanics

[David Humphries]

I love this thread Thanks to everyone who has contributed.

 

Ben

 

Well that'll be 51 individual thanks you need to give out to the other posters on this thread Ben.

 

 

Thorn from earlier today......

 

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[David Humphries]

Topped Ash in a woodland walk.

 

45 degree cross ribs.

 

Repair of shear on top of old branch notches, or helical ribs from a twisting trunk ?

 

 

 

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[Tony Croft aka hamadryad]

Spotted this in local country park, not sure why it is ?

 

The language in those limbs tells the whole story, hazard beam split in lower branch, compression failure on upper limb, decayed junction with lead on upper limb, weld with lower limb causing falcrum, vertical shoot on thicker limb a now dominant but once epicormic or sub order branchlet.

 

really chatty old branch form!

[David Humphries]

must be a rare thing?

 

 

 

most certainly not a rare thing.

 

 

Absolutely everywhere.

 

 

 

 

Yours is a great example.

 

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[BenR]

Finally got round to posting these shots from in and around Hortus Bontanicus, Amsterdam.

 

The leaner is in Vondelpark if anyone is off to the Dam and wanted to see it. They just seem to have a a greater focus on preservation of trees over there. Maybe too much so..

 

I think the Willow at the end has some sort of Ganoderma, but I guess that is for another thread.

Edited December 22, 2010 by BenR

[BenR]

Not sure what happened there.. Hopefully it works this time.

[David Humphries]

The tree in the second shot looks to have been over & resting for quite sometime.

 

interesting that they've not removed it.

 

As for the Gano'd salix, I'm a little supprised to see it still left standing with reference to the chestnut that failed at the Anne Frank House recently.

(I'm not advocating knee jerk reactionary felling here, btw)

 

when did you take these shots Ben?

 

 

 

 

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[BenR]

Summer. I think it was the end of August. I may be wrong though about the Gano. Whatever it is, there were about 20 brackets on it all looking the same.

[David Humphries]

brown spore, cracking of the top surface, thin rimmed.

Would think that they are G. applanatums

 

 

 

 

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[BenR]

brown spore, cracking of the top surface, thin rimmed.

Would think that they are G. applanatums

 

 

 

 

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I did think that but Im never 100% sure of the difference between applanatum and australe, so I just go with ganoderma spp. lol Need to get better at fungi ID.

 

Thought the twisted Catalpa trunk was interesting though. Especially in such a sheltered place.. Any ideas?