Questions tagged [trees]
Common classification for perennial plants with woody, elongated stems.
155
questions
-2
votes
0answers
21 views
Without real air could we make prototype air? [closed]
Could this be true and would we be able to make fake air?
4
votes
0answers
29 views
Why do quaking aspens quake?
I've just finished reading The Hidden Lives of Trees by Peter Wohlleben, which I thoroughly enjoyed.
According to the author, the advantage of shaking the leaves is that both sides of the leaf are ...
0
votes
2answers
84 views
How do bees help flowering trees survive?
I have often heard a vague claim that bees help flowering tree populations survive.
As far as I know, bees take nectar and pollen concentrations from the flowers of flowering trees and use at least ...
6
votes
1answer
139 views
Identify this tree?
I found this tree in Crete, Greece close to the sea, planted next to a building. Since I haven't seen this tree anywhere else in the island, I suppose it was planted by someone. Here are some pictures ...
2
votes
1answer
106 views
Does the 'President' have 2 Billion Leaves?
The world's second-largest known tree, the President, in Sequoia National Park is 3200 years old and is said to have 2 billion leaves (Source: https://youtu.be/vNCH6uhB_Bs?t=59).
Is this correct? And ...
1
vote
1answer
42 views
What is the etymology for Pinus halepensis?
I have a problem of figuring out the etymology of Pinus halepnesis.
An etymonline search with halepensis brought no result.
It is unclear to me from the English wikipedia article and from the ...
0
votes
2answers
94 views
Are there organisms that “branch more” near the leaf?
(I'm a computer scientist)
Tree branching is a fractal patterns in nature. I know stems typically branch in two at each level (self-similarity). I guess there are plants or other organisms that ...
0
votes
0answers
20 views
Book recommendations on the evolution of trees
Trees have been around for hundreds of millions of years, since the first "true wood" evolved during the Devonian period ~400M years ago. This means we have fossilized wood in the form of tree ferns, ...
0
votes
0answers
17 views
Evolution and survivability of palm-like plants
I live in a place filled with palm trees. I’ve been wondering for some time now, that if I lobbed off the top of a palm tree, that if the palm would regrow from another new branch? Would the palm die?
...
2
votes
0answers
43 views
Folded stem on apples - does it have a name?
I have some Newton Wonder apple trees. One feature of the apples it bears is that the flesh around the stalk is occasionally elongated out of the calyx. Below is a picture that shows this on the near ...
1
vote
0answers
31 views
Spatial sequence of autumn leave colouring: top to bottom
Leave colours on trees seem to vary on the same tree from top to bottom. Leaves higher up are already further ahead in the shedding process. What's the reason for this tempero-spatial gradient?
0
votes
4answers
148 views
Is it true to say that the genome of trees includes or at least “encapsulates” the genome of mushrooms?
As a botany amateur, I know that mushrooms (which are of course studied in field of mycology and not botany) are dependent in trees or shrubs (and maybe also bushes) and that there are generally ...
1
vote
0answers
34 views
How many plants or trees should one plant to take carbon dioxide from atmosphere?
I'm interested on computing things. I know that some biologists have done mathematical modelling. Has anyone took any calculations on the following?
How many trees or plants should one plant such ...
0
votes
0answers
5 views
Young sourwood trees vs Carolina Silverbel
I’m looking for a good way to distinguish young Carolina Silverbell trees from young sourwood trees. Suggestions?
1
vote
0answers
33 views
Are there any evolutionary reasons for the different tree shapes? If so, What are they?
So we know there are a thousand types of trees with different shapes.
We have Columnar shaped trees:
Pyramidal or Conical shaped trees:
Weeping shaped trees:
And we also have Round, Vased, Open-...
5
votes
1answer
88 views
Leaf formation on unknown tree: cocoon or something else?
A small tree in my yard has leaves which appears to double over themselves. The first two pictures show this phenomena, and the third is the same tree to maybe aid identification.
I can't absolutely ...
0
votes
0answers
20 views
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
votes
2answers
161 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
votes
1answer
28 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
64 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 ...
0
votes
0answers
27 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
79
votes
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
votes
2answers
127 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 ...
0
votes
0answers
21 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
votes
1answer
80 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.
1
vote
1answer
192 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
votes
1answer
56 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 ...
1
vote
0answers
22 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 & ...
2
votes
1answer
115 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
votes
0answers
39 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, ...
9
votes
2answers
202 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
84 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 ...
1
vote
1answer
72 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
143 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
74 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 ...
6
votes
1answer
302 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 ...
1
vote
2answers
50 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
vote
1answer
31 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
votes
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 ...
1
vote
0answers
55 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
53 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
92 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
187 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 ...
4
votes
1answer
473 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 ...
0
votes
1answer
36 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 ...
1
vote
1answer
254 views
3
votes
3answers
190 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
votes
2answers
144 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
votes
1answer
57 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 ...
0
votes
1answer
80 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 ...
