Questions tagged [trees]
Common classification for perennial plants with woody, elongated stems.
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What is the total mass of leaves on an 'average' mid-latitude deciduous tree?
I know that this is a broad question as there are a very large number of different species of tree with all manner of profiles, height, leaf sizes, etc. My ultimate goal is to estimate the total mass ...
4
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2answers
140 views
Why does this plum/apricot hybrid look like brains?
Why does this plum/apricot hybrid look like brains?
Notes:
Here's a photo of what a normal fruit on the tree looks like.
Location is Zone 5, east of Toronto.
There are about 20 other fruits on the ...
-1
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1answer
25 views
Long brown needly things fallen from tree?
I was walking next to a row of trees (I think coniferous) and found many of these things on the ground:
A parallel bundle of 2-4 medium-brown needly things, about 15 cm long and 1 mm in diameter, not ...
4
votes
1answer
44 views
Is it unusual for populations of archaea to be found living inside trees?
The NPR News article and podcast Getting Fire From A Tree Without Burning The Wood begins with
A scientist walks up to a cottonwood tree, sticks a hollow tube in the middle and then takes a lighter ...
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0answers
24 views
Do trees consume more CO2 at day time than they produce at night time? [duplicate]
I guess they should be, otherwise what is the point of planting them to reduce CO2 emissions, but I don't see how they do that
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2answers
8k views
What's up with this leaf?
This cool design was "tattooed" on this leaf.
I found it on the windshield of my car.
What's up with it?
5
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2answers
103 views
Do trees in a forest generally grow in a lattice formation?
The closest arrangement of trees in which they are at least a certain distance away from each other is a triangular lattice, much like a honeycomb. I wonder if you tend to see this sort of arrangement ...
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0answers
17 views
Are Pando older than 80,000 years?
When you look info for Pando trees, you usually find that the clonal colony is about 80,000 years old. But here, List of oldest trees there is a reference to a book which states the age to (possibly ...
2
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1answer
77 views
What is this tree growing in my town?
Can anyone tell me what kind of tree this is? I took this picture today. It's in Iowa City, Iowa.
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50 views
How many nutrients do trees process daily?
Is this tree fact below that I have found on social media sites true? I don't know the source of the quote. It's pretty amazing. I'll be glad if someone can provide the source too!
Natural Wonders
...
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1answer
43 views
What species of tree is this (found in Navarre, Spain, many tiny flowers)?
It was planted within the urban area of Pamplona, Navarre, in Spain. It does not seem like it's native to the area, since no trees like it are found in nearby forests. Its size is of 7-9 meters, while ...
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0answers
20 views
Near-zero water loss in a closed hydroponics system?
I know there are a lot of factors that would impact this...
Plant type.
Plant neediness (i.e., even sibling plants will possess different needs, defects, etc).
Automation efficiency.
Water & ...
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27 views
What does banyan tree release from roots?
What happens when banyan tree roots pierce and joins in to the water in a river beside. Does banyan tree roots excrete any waste? If so, when will that happen night or morning ? What properties do ...
2
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1answer
101 views
What plant have I collected?
I have collected this plant from the soil in a park in Belgium. I thought it was a child of a plant which was growing nearby but when the leaves started to grow I realised it is a different plant.
...
2
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0answers
34 views
Winter is getting shorter and warmer. Does this mean deciduous trees can photosynthesise for longer and thus absorb more carbon dioxide?
As springtime is starting earlier this year, I wondered if that would mean deciduous trees had more time to photosynthesise and, therefore, they could absorb more CO2 or have longer periods to grow, ...
8
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2answers
189 views
Is the chemical composition of urine detrimental or beneficial for a tree?
Seeing as a lot of people around the world urinate against trees it came to mind that I never thought about how the tree responds to this.
Is it detrimental for a tree if people urinate against them?
...
6
votes
1answer
68 views
Branch taking over a tree trunk
I stumbled upon a birch growing in sandy soil in a coniferous forest in central Russia.
It looks like over time the tree trunk got bent towards the trail and one of the branches became the new trunk ...
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1answer
51 views
Is it possible to estimate tree height from stump/breast diameter and species?
Kindly pardon my poor knowledge, my area of expertise is not biology.
I am currently working on project where I have access to tree's stump and breast diameter and its species. We are trying to ...
4
votes
1answer
77 views
Fruit identification - What is this green long fruit?
I found this fruit in the South of France, but I have no Idea what it is. It's a green, hard fruit. I tried to cut it to see the inside (on the following pictures).
It fell from a big tree, but I don'...
4
votes
1answer
67 views
Can someone help me to identify what kind of pear is this?
I went to my local groceries supermarket (in Lima, Peru) and found this cheerful looking pear named locally as "pera canela". But I found it weird as the only variety which I'm aware of is Packham's ...
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0answers
15 views
Why Populus Nigra does not grow in Israel?
What are the obstacles for Populus Nigra? It, especially the pyramidalis (Italian) variety is considered quite Southern plant in Russia.
6
votes
1answer
97 views
Less oxygen in winter?
Since Oxygen is produced by photosynthesis, would there be less oxygen in the air in winter, where the trees shed their leaves and the sun generally shines a lot less? If yes, would that be a ...
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2answers
49 views
Is there any relationship between the height of a tree and the number of branches emerging from the main stem?
Is there any relationship between the height of a tree and the number of branches emerging from the main stem?
I am particular interested in spruce or fir.
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1answer
25 views
How to promote acorn maturation
I have acorns from an oak tree. They look like:
but I would like to speed up their maturation so they split and I can separate the caps:
How can I speed up this maturation process?
2
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0answers
20 views
Why do autumn leaves on the eastern sides of trees change and fall before the western leaves?
I've noticed that for the autumn leaves in my area (Great Lakes region of United States), if a tree's leaves are changing or falling asymmetrically, they almost always change first on the East-facing ...
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0answers
45 views
Fruiting of trees — environmental stimuli and biochemical cascades
My question concerns fruiting of trees in general. However, I live in a
tropical country (Philippines) where mango trees are ubiquitous, so I'll use it
in stating my question.
The question is about >...
2
votes
1answer
51 views
Why does a lightsource postpone the time it takes for the leaves falling from a birch tree?
It is autumn and the leaves have already left their trees on all birch and other trees that has leaves, except one. This birch has a spotlight pointed to the tree and it is on 24/7. I have recognized ...
7
votes
1answer
81 views
Identifying a shrub with unusual “many shoots” growth behavior
While recently hiking in the southern mountains of New Hampshire, we came across a plant, and some of them were exhibiting what we interpreted to be a disease, or least unusual growth. On some of the ...
8
votes
2answers
178 views
What is this fruit?
There is a hairy hard shell (looking like a small kiwi), which naturally breaks, and under it there is brain-shaped red sweet flesh, half-covering the smooth black seed.
Picture taken in the ...
3
votes
1answer
139 views
Are turkish hazelnuts edible?
The title of this question is Google suggestion verbatim, when I tried to write it. Yet, I found no answer specifically for Turkish hazelnuts.
Turkish hazelnut is a tree and it's fruit looks ...
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1answer
34 views
Stained chestnut tree leaves
The leaves of the chestnut tree in our back yard have, for a while, developed these stains on them:
..which don't appear to be a normal feature of this tree's leaves, at least according to the ...
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1answer
250 views
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3answers
165 views
If it weren't for animals, insects, or people, would plants that produce seeds (nuts, fruit, etc) cease to exist?
I gather that some would or could in theory still be successful, but don't most depend on takers to flourish?
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2answers
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Palm Tree Identification
I need help identifying this particular palm tree. Unfortunately, I don’t have many details to give, and I’m by no means one to say I’m even an amateur at plant identification. We are unsure of its ...
3
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1answer
54 views
Identification of a young tree in the alpine region of southeastern France
I have a young tree growing in my backyard (in Grenoble, France), and I was not able to identify it, despite searching with many identifier tools.
It's 2 years old now and must be 2 meters high. It ...
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1answer
71 views
Would salt cause a pistachio nut not to be able to germinate?
If I buy a bag of pistachio nuts that have been hand picked off the tree when ripe, then salted in a (light) saltwater solution, then vacuum-sealed, and stored in a refrigerator, then will they ...
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0answers
76 views
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2answers
94 views
Is Black mulberry always deciduous?
I have a black mulberry (Morus sp.) in my garden (or 2 actually). According to the information I could find it is a deciduous tree. The trees in my garden do indeed lose their leaves. However, as most ...
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1answer
103 views
Do squirrels and blue jays play a role in oak tree distribution?
White oak (Quercas alba) acorns have lower tannin levels than red oak (Quercas rubra) acorns, therefore animals tend to eat the white oak acorns before red oak acorns. Animals such as squirrels and ...
3
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1answer
517 views
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32 views
How long does it take to extract a tree core for dendrochronological analysis
I'm going to do research in the tropics and am considering using tree cores for part of my analysis. However, for my planning:
How long does it take on average to extract a tree core of a tree with ...
0
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1answer
30 views
Why do some trees hold their leaves through fall and winter?
Why do some species of oak (Quercus spp.) retain their leaves through fall and winter? I've found that these leaves are called marcescent leaves. There must be some benefit that the tree gains from ...
10
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1answer
386 views
What kind of tree is this — why do its huge leaves change shape and “grow fingers”?
Edit 2: Confirmation that it's one tree!
Surrounding trees on either side along the sidewalk are completely different, and the ones on the other side of the fence are short and have rounded but far ...
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1answer
104 views
More informative phylogenetic trees
In the presentation of phylogenetic trees, the geometric shape of the trees often seems somehow arbitrary and is more driven by aesthetics than by informative reasons.
But wouldn't it make sense to ...
5
votes
1answer
78 views
What might a supposed “tree enzyme” be — injected into a Morton Bay Fig tree?
I was recently visiting Fremantle in Western Australia and noticed a large Morton Bay Fig tree in Kings square in the centre. Apparently the health of this tree had been declining, but they hope that ...
2
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0answers
48 views
Are trees still carrying their leaves more likely to be felled by an autumn storm?
Is there evidence that trees still carrying their leaves are more likely to be felled by an autumn storm than trees already having lost their leaves?
At first sight this seems plausible (and might be ...
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0answers
91 views
Flora of Ice Age Europe
I'm trying to get a very in-depth idea of the ecosystem of Pleistocene Europe, somewhere around 40,000 years ago, and I can't seem to find what types of foliage (other than the obvious grasses and ...
5
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1answer
79 views
What is this tree in Sydney?
My family snapped this picture around Sydney, Australia. Could someone please advise what this tree is? Help! We are smittened with it :)
3
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0answers
48 views
What species of tree is this?
We have this cute little tree in our front yard (Denver CO):
Unfortunately we have to get our water main replaced and this tree lies right in the path of destruction. Anybody know what species it is? ...
3
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1answer
658 views
What is this tree that displays sycamore like characteristics but appears to be too small?
I have been wondering about this tree:
It's bark/leaves make me think it's a sycamore, but it seems too puny. I don't think they'd plant a sycamore there... What is it?
The tree is in a park/...
