Questions tagged [trees]
Common classification for perennial plants with woody, elongated stems.
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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, ...
6
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0answers
85 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?
...
2
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0answers
28 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
36 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
60 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
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1answer
58 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
14 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
73 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
44 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
18 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
38 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 >...
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0answers
37 views
Why does a lightsource postpone the time it takes for the leaves falling from a birch?
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
72 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 ...
5
votes
1answer
107 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
120 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
27 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
242 views
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0answers
27 views
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3answers
144 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
90 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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0answers
48 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
65 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
74 views
2
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2answers
77 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
84 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 ...
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1answer
507 views
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0answers
31 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
votes
1answer
26 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
304 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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vote
1answer
101 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
63 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
47 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
84 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
votes
1answer
77 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
46 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
votes
1answer
438 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
186 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
140 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 ...
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0answers
47 views
Please help ID this plant
Can anyone please identify this plant and confirm if the species is Synsepalum dulcificum (Miracle fruit)? Pics were taken near my house in Bangalore. Because the miracle fruit plant is not native to ...
3
votes
1answer
380 views
what is the poison in chinaberry?
I was trying to look up what the poison in Chinaberry is, however, with the exception of a couple related compounds was able to find no information on the poison. What chemical makes up the Chinaberry ...
3
votes
1answer
89 views
Did the eclipse make the leaves fall?
I live in Pittsburgh PA, the eclipse on Monday August 21 was only about 80% coverage here. It was notably darker, but less dark then an overcast day. The night of August 21, had a low temp of about ...
6
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1answer
101 views
Oregon - Tree Identification
Western cascade forest, definitely was planted. In a clearing in the forest along with some western red cedars. I couldn't find anything that would match it when looking for native Oregon trees.
5
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1answer
103 views
Can you help identify this tree from my garden?
The picture is that of an evergreen tree. I have seen very similar trees in Northern Italy. I would appreciate any help. Thanks in advance.
3
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3answers
440 views
Strange white strings on cherry tree leaves
What could be the cause of these white strings on the leaves of our sour cherry tree? Is it some kind of fungus or an insect?
Also, i don't know if it's related or not, but on the other side of the ...
3
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0answers
118 views
How did fig tree take root in trunk of palm tree?
Please see pictures below.
I never saw anything like this. Do the roots of the fig tree penetrate the trunk of the palm tree? Is there a symbiotic relationship between the two?
7
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1answer
383 views
What is the name of this tree with compound leaves?
Can anyone tell me what is the name of this tree?
It was found in Northern US.
(click on image to enlarge it)
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2answers
74 views
Is this an eastern hemlock (Tsuga canadensis) seedling?
I recently planted a few seeds gathered from a Tsuga canadensis cone in soil gathered from a garden full of weeds. I can't tell if what I have growing is a hemlock seedling or just another weed. See ...
5
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1answer
74 views
Tree identification - Oregon
A bit west of Portland. It doesn't look native to me, and we didn't plant it. This is the first year it flowered, so I decided to see if I can get it identified. If it matters, the flowers are ...
2
votes
1answer
64 views
Are there any trees that prefer to grow on the floor of water bodies but protrude to the air?
Are there any trees that prefer to grow on the floor of water bodies but protrude to the air? Specifically, those that prefer salt water or grow on shallow sea.
