Questions tagged [trees]

Common classification for perennial plants with woody, elongated stems.

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1answer
23 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
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1answer
38 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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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
101 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
16 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 ...
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1answer
76 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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0answers
49 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 ...
3
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1answer
42 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
17 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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0answers
20 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
99 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
32 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, ...
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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
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1answer
65 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
48 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
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1answer
73 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'...
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1answer
64 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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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
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1answer
93 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
47 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.
1
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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
44 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
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1answer
50 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
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1answer
80 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
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2answers
177 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
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1answer
135 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
32 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
248 views

What attacked my peach tree?

Help me please! I have to get rid of these!
3
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3answers
163 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?
7
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2answers
109 views

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
70 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
75 views

Identify this tree from Nepal

This is a picture of a tree in Nepal. Can somebody identify it?
2
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2answers
87 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
101 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

identify this tree

location: trabzon(turkey) planted for recreational purpose
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0answers
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 ...
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1answer
29 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
362 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
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1answer
77 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 ...
2
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0answers
90 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
78 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
609 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/...
3
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0answers
218 views

Identifying a weird Texas tree

I recently saw this tree in Texas, with many bees on it. I think it attracts bees. However it didn't have any specific smell, so I don't know why there were so many bees (they were bee for sure). I ...
4
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2answers
159 views

Species I.D. hardwood tree

There are two of these trees, growing in old fence rows, along my yard, in central VA, Augusta County, Shenandoah Valley. They have smooth, leathery leaves, pale wood, quite hard to cut, and tough to ...