Questions tagged [trees]

Common classification for perennial plants with woody, elongated stems.

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2
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4answers
4k views

Doubly-compound leaf examples?

I've got a project where we collect leaves, classify them, etc. There are some required classifications. One of the requirements is to get a doubly-compound leaf. What are some trees that are doubly-...
2
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2answers
990 views

Identify this indoor plant with strange stem-like leaves

It appears that this plant branches multiple times from the base of its stem; however, I'm not sure if the base stems are from one organism. It becomes yellowish in color at the tip each stem-like ...
4
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2answers
139 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 ...
5
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1answer
270 views

What is this (seed/berry)-like object and where is it coming from?

I've been finding these little green (seed/berry) like objects in my garden for three years now. This picture shows either a large variant or simply a later lifecycle stage of development. At ...
-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 ...
7
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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 ...
4
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1answer
42 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
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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
9
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1answer
148 views

At what temporal scales do forest structures change?

At which time scales do forest stand characteristics (i.e. stand density, species composition, & diameter distributions) change in a temperate European forest which is not managed? Ideally, I'd ...
78
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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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1answer
132 views

Can you help identify this tree from my garden?

The picture is an evergreen tree. I have seen very similar trees in Northern Italy. I would appreciate any help.
8
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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 ...
7
votes
1answer
781 views

Squirrel nest construction

I've often wondered how squirrels -- specifically, eastern grey squirrels (Sciurus carolinensis) make their nests. Specifically, I've been curious about how they "weave" everything together to make ...
5
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2answers
102 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
votes
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 ...
6
votes
1answer
66 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 ...
2
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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.
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 ...
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? ...
0
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0answers
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 ...
2
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1answer
100 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. ...
3
votes
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
19 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
25 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 ...
3
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1answer
488 views

What is the name of this whorled-leaf tree in India?

Location: South India Month: June Season: Rainy Branch Distribution: Leaf of the tree:
3
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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 ...
2
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0answers
33 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, ...
3
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0answers
171 views

Can someone identify this tree?

It appears to be a kind of fig tree (perhaps similar to the fiddle leaf fig tree but without the fiddle?), although the leaf shape doesn't match. It didn't seem very appealing to eat (!), it was ...
1
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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 ...
13
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2answers
840 views

What is Growing on These Tree Leaves? (Image)

I found a seemingly diseased tree when I was out playing tennis yesterday... What is growing on this tree leaf? Is this a disease? If so, is it contagious? I have zero knowledge in botany, but I'm ...
6
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1answer
215 views

What sort of seed pod is this?

My son found this floating in a stream in Massachusetts, in the northeastern US. It was intact when he found it, but he cracked it open to see what was inside. I did some Google image searching, but ...
5
votes
1answer
1k views

Mesophytic Climax community in succession?

My textbook says that in all cases of ecological succession (xerarch, hydrarch, etc.), the ultimate climax community, assuming constancy of environment, is a mesic community. Xeric or hydric pioneers ...
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1answer
1k views

What is the name of this plant with mango type leaves?

Location: South India Leaves: Mango Type Indoor/Outdoor/Wild: Indoor Month: May
3
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1answer
648 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/...
4
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2answers
260 views

Why do pine stands exist?

I live in the midwestern United States. I cycle to work, sometimes on heavily wooded roads, and I can't help but notice that in most places within the surrounding deciduous forests Pine and evergreen ...
4
votes
1answer
65 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 ...
4
votes
1answer
107 views

Jamaican/Caribbean insect, plant identification keys/field guides

Where can I find plant and insect identification keys and Field guides for Jamaica specifically, or for the Caribbean as a whole? I've searched Amazon and google for Jamaican and Caribbean ...
4
votes
1answer
75 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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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.
1
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1answer
205 views

Are “constraint trees” in phylogenetic analysis cheating? How can I correctly use them?

How do phylogenetic experts evaluate results which use constraint trees? Are there examples in the literature where phylogenetic experts detail how they use constraint trees? Here is my problem. I ...
8
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1answer
178 views

What type of tree is this?

I photographed this group of trees a couple of years ago at the northern tip of Prudence Island in Narragansett Bay. Any idea what species these are?
6
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1answer
95 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.
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?
5
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1answer
188 views

Why are the genomes of some trees so large?

For example, the current largest known genome belongs to a tree: http://motherboard.vice.com/read/the-largest-genome-ever-sequenced-belongs-to-a-tree I have heard that this could potentially be ...
0
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0answers
51 views

Few deciduous trees in old forest

There is an old forest near me that has lain untouched for at least 150 years and possibly longer. The forest is on a big hill which is surrounded by a marsh. The great majority of trees in the ...
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1answer
249 views

What attacked my peach tree?

Help me please! I have to get rid of these!
1
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1answer
448 views

What nocturnal animal sound am I hearing in the trees in Maine?

Every year, during late summer nights (usually around 9:00 pm) in Maine, I hear a noise coming from high up in the trees. The trees I hear it from are mostly maple or conifer, but where I live there ...
11
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2answers
15k views

Are these birch or aspen trees?

I was just wondering if anybody could help me identify the trees in this image? I am confused as to whether they are aspen or birch, a mix of the two, or whether the brown/reddish trees are some other ...