Australian Grass Trees

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BobL

No longer addicted to AS
. AS Supporting Member.
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Location
Perth, Australia
Near our campsite there is a national park where there are thousands of Western Australian Grass Trees (Xanthorrhoea preissii) they look like this.
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These are tall and spindly, usually they are about 2-3 times in diameter.

In the left foreground of this photo there is a one just emerging from the ground. The leaves are a spiky hard grass which is quite brittle and amazingly resistant. The trunk normally grows very slowly, about an half an inch per year, and it takes about 30 years just to get this emerging stage. The outside of the trunks are usually black from fires but the thick green grassy head survives bushfires and small animals sometimes hide from fires inside the grassy heads.

The trunk is composed of old leaf segments glued together by a red brown resin so is useless for milling.
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The trunks are very fragile/britlle and are easily pushed over and very hard to grow outside their natural habitat but his one seems to have survived a serious fall.

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This one is 21 ft high so if it has grown at 1/2" per year it is more than 500 years old
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The large dry skirt of unburnt grass leaves around the green head suggests this tree has not been in a large fire for some time or local bushfires have been small and being so tall the dry skirt can survive the fire.

Even though the main trunk is useless for timber, the bases are prized by people like wood turners and speciality woodworkers who normally make items such as small lamp stands, bowls and platter and jewelry boxes.
Example here.
The sawdust contains a lot of resin so it produces a lot of fine dust when worked and most people are highly sensitive to the dust.

In very old trees like the above the harder base continues to extend up the tree. This base is about 4 ft long which is very unusual and would make it just millable for short boards - pity it's in a National Park.
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Bob would you cut down a 500 year old tree just to mill it. Are they common .​
They are very common and millions of them were burnt last century during land clearances which is the only situation in which I would mill them. The root bases of many smaller ones are still being turned up on ranches and are often picked up and used as they make great fire wood.
 
Thanks for the pics. Bob...

Amazing how diffrent things are being on the other side of the world....The one tree you was standin beside and was prop at least 500 years old..So hard to imagine here........
 
Ya I agree. On this continent...we get all excited when we see something over 150 years old (house, tree, bridge etc). Other places...it's 100s or more years before they get worked up. Even Bobls photos while camping give us a look at at 500 yr old tree he just walks up too. I cannot imagine that country. So different it's kind of strange. A grass tree...come on. How weird is that? Very fun to see though.
 
Ya I agree. On this continent...we get all excited when we see something over 150 years old (house, tree, bridge etc). Other places...it's 100s or more years before they get worked up. Even Bobls photos while camping give us a look at at 500 yr old tree he just walks up too. I cannot imagine that country. So different it's kind of strange. A grass tree...come on. How weird is that? Very fun to see though.

It gets a lot weirder and older than that.
About 10 miles from my house there is the start of an area about as big as Texas that is about 2500 million years old. About 1000 miles up the road is a row of low dry hills where there are zircon crystals that are 4300 million years old.
 
Ya see..that's just crazy. I live in an area that seems to have history all the way back to the geez..what should I say...1800s. Not that you'd see much of anything left over from then. You can here and there. It's a young country here. Stuff millions of years old is neat to see....unimaginable for me.
 
It gets a lot weirder and older than that.
About 10 miles from my house there is the start of an area about as big as Texas that is about 2500 million years old. About 1000 miles up the road is a row of low dry hills where there are zircon crystals that are 4300 million years old.

Canada still has the oldest rocks in the world though! AFAIK the Canadian Shield formation around Hudson Bay is the oldest exposed rock on Earth. At least when I was in school it was.
 
Canada still has the oldest rocks in the world though! AFAIK the Canadian Shield formation around Hudson Bay is the oldest exposed rock on Earth. At least when I was in school it was.

Correct.
As well as oldest rocks, there are oldest minerals, oldest cratons and oldest rock formations, all stiff competition between Canada NW territories and Western Australia.

Here's what the area with the oldest zircons looks like.
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It gets to 120F in the middle of summer but the winters are balmy and in spring the wildflowers are like carpets of colour for a few weeks.
 
Ya I agree. On this continent...we get all excited when we see something over 150 years old (house, tree, bridge etc). Other places...it's 100s or more years before they get worked up. Even Bobls photos while camping give us a look at at 500 yr old tree he just walks up too. I cannot imagine that country. So different it's kind of strange. A grass tree...come on. How weird is that? Very fun to see though.

Sorry but thats not quite true. The California costal redwoods live for over 2,000 years and grow to over 300 feet tall and 25'+ in diameter. These are exceded in age by the bristle cone pines, also in California which are over 3,500 years old and are the oldest living organisms on earth.
 
OK...yup...very old trees can be found out west. Yes..the Canadian shield is very old...we go Rving up north and everything is "on the shield". If you're not on the rocks..you're in the water beside the rock.
What I was really thinking of was old buildings, old trees (since I'm always looking at trees). Though there are some really old ones out west...I've never seen them. Here...a really old tree might be 200 yrs. I get worked up. No really old buildings though..they were made of wood back then and are long gone. A 2000 year old tree...I think I'd have to have my photo taken with it.
 
Sorry but thats not quite true. The California costal redwoods live for over 2,000 years and grow to over 300 feet tall and 25'+ in diameter. These are exceded in age by the bristle cone pines, also in California which are over 3,500 years old and are the oldest living organisms on earth.



Bingo! :)
 

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