Questions tagged [trees]

Common classification for perennial plants with woody, elongated stems.

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80
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?
15
votes
3answers
263 views

Spruce growing high up in a maple trunk: Can a partially rotted trunk completely sustain another tree?

I've come across a spruce tree that is growing 15ft up in the crotch of a sugar maple tree: According to Google StreetView, the spruce has been there since before 2007 (over 10 years ago!). I've ...
15
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2answers
1k views

Australian Tree Identification - maybe pine?

Can you help identify this species? (Link to imgur album with all images) It was growing next to the Yarra River (maybe 10 meters from the bank) in Melbourne. At first I thought it was a type of ...
13
votes
2answers
936 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 ...
12
votes
1answer
2k views

Help ID this South Indian fruit-bearing tree

So there's this fruit-bearing tree near my house in Kerala, South India. A senior neighbor of mine tells me that this fruit is edible. I tried it out, and it tastes alright. I want to ID this plant, ...
12
votes
1answer
355 views

What is this small tree?

I found a dozen of these small trees in a local park that is just an overgrown homestead. The leaves look something like an elder but the flower clusters surrounded by white, four petaled false ...
12
votes
1answer
477 views

What tree is this?

Can you please help me to identify this mystery tree. I have been trying to identify it for four years (Leafsnap app didn't help). Here are a few things about the tree. All the leaf veins are ...
11
votes
2answers
19k 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 ...
11
votes
1answer
842 views

Why do birches have a white bark?

Several species of the tree genres Betula have a white bark,especially when they are young. This is quite peculiar to trees - at least in central Europe; so I'm wondering if there is a ecological ...
11
votes
2answers
1k 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 ...
10
votes
1answer
635 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 ...
9
votes
1answer
155 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 ...
9
votes
2answers
207 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? ...
9
votes
1answer
187 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?
9
votes
2answers
233 views

Australian Tree Identification Help

I am looking at identifying a tree for a friend who lives outside of Melbourne. Being from Tennessee in the US, we don't have anything very similar to this at all and it doesn't look like any of the ...
8
votes
1answer
685 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)
8
votes
3answers
381 views

What type of tree is this?

This is a tree that I have been growing. I'm wondering if this is a mulberry, and if so, what kind? Location is Arizona.
8
votes
2answers
594 views

Why do some trees in California have dead brown leaves but also new green leaves?

It's Autumn 2015, and I just saw a tree that had mainly dead brown leaves but also some new small green leaves growing. Why didn't the tree just keep its old leaves? Does it think we are in spring ...
8
votes
2answers
193 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
83 views

What is the fate of the typical tree?

Walking through the local established broadleaf forests dominated by oak and tulip poplar (Eastern U.S.), it is common to find patches of young tree saplings, say 10-20 oak or tulip poplar saplings ...
7
votes
1answer
104 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 ...
7
votes
2answers
104 views

What is this species of tree?

In my city, there is a unique tree, with thorns all over it. I would like to know - what species is this?
7
votes
2answers
210 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 ...
7
votes
1answer
150 views

Tree ID request

We have a small tree (more like a shrub) in our village in North Eastern Anatolia, and it is known for its local name which is not Turkish. Even worse, I don't know which language it is, but most ...
6
votes
1answer
164 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 ...
6
votes
1answer
475 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 ...
6
votes
1answer
108 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 ...
6
votes
1answer
235 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.
6
votes
1answer
258 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 ...
6
votes
1answer
200 views

Trees growing around objects vs pushing them away. Where is the threshold?

If a tree grows against a taut wire then the tree will grow around it, eventually enveloping the entire wire. This often scars the tree, and if the wire is thick enough, it will interrupt nutrient ...
5
votes
2answers
197 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
votes
2answers
143 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 ...
5
votes
2answers
206 views

What kind of tree is this?

I live in Denmark, Europe and was going for a walk on a beautiful cemetary in the city. I saw this tree and would like to know what species it is. Unfortunately i have no photos of the tree from a ...
5
votes
1answer
115 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 ...
5
votes
1answer
2k views

How to correctly and accurately identify a few species of trees from their leaves?

I want to identify a tree from one of the 12 species listed based on observing their branch and leaves. Is there quick and neat way to do it? Red Oak, White Oak, Red Maple, Striped Maple, Tulip ...
5
votes
2answers
166 views

Can anyone ID this flower plant by the photo?

Can someone identify this plant? It has big red flowers when it flowers! Not sure if it is native, but it is in my grandmothers garden in Vancouver, British Columbia, Canada.
5
votes
1answer
95 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 ...
5
votes
1answer
89 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 ...
5
votes
1answer
98 views

Identification of an unusual tree

Location : Lyon, France I think it's one of the laziest trees I've ever seen XD
5
votes
1answer
318 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 ...
5
votes
1answer
217 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 ...
5
votes
1answer
426 views

Best methodology to compare computed phylogeny tree with taxonomy?

I have computed a phylogenetic tree using an alignement of sequences, and I would like to : Compare it to the "known" taxonomy (uniprot/ncbi which I know is not the most up to date one) and extract a ...
5
votes
1answer
970 views

Does the bending of a tree's trunk in the wind stimulate and strengthen root growth?

Recently Southern California experienced extreme wind velocities and afterwards the news reported over 300 trees had fallen in San Diego County. I had either heard or read somewhere that the action of ...
5
votes
1answer
3k views

How does one calculate the amount of oxygen produced by trees?

I'm currently working on a project to measure the impact of tree planting. Calculating the amount of oxygen seems harder than I imagined. Of-course there's the type and size of the tree and the ...
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 ...
4
votes
1answer
80 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
2answers
317 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
627 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 ...
4
votes
2answers
7k views

Do trees grow from the bottom or the top, or is that oversimplifying?

I was wondering how trees grow. I wonder if it was similar to hair growth which occurs from the follicle. but clearly branches grow from the trunk so there is definitely a difference with hair growth. ...
4
votes
1answer
1k views

Fruit-bearing tree identification

Just moved into a new house in Puerto Rico and I found this tree in the back garden. Can anyone tell me what tree this is, and whether its fruit is edible?