Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [trees]

Common classification for perennial plants with woody, elongated stems.

0
votes
1answer
25 views

Tree identification - Sicily [on hold]

I am trying to identify the trees in this image, taken in Siracusa, Sicily. This would be very helpful for my thesis project I am working on at university.
8
votes
1answer
142 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? ...
-3
votes
0answers
51 views

What is this stuff?

What is this stuff? It was found on a tree in New Hampshire and nobody here can identify it.
2
votes
1answer
82 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
35 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
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 & ...
0
votes
0answers
10 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
votes
1answer
402 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
votes
1answer
129 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
votes
0answers
30 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
votes
0answers
130 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 ...
2
votes
0answers
30 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
41 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
votes
2answers
534 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
votes
1answer
152 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
915 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 ...
1
vote
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
9
votes
1answer
130 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 ...
5
votes
1answer
245 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 ...
3
votes
1answer
485 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
votes
2answers
245 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
60 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
101 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
63 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'...
0
votes
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.
1
vote
1answer
174 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 ...
1
vote
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 ...
8
votes
1answer
177 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?
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 ...
6
votes
1answer
82 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
45 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
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
votes
1answer
176 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
votes
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 ...
1
vote
1answer
243 views
1
vote
1answer
346 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 ...
6
votes
0answers
727 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 ...
2
votes
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-...
12
votes
2answers
14k 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 ...
4
votes
1answer
602 views

What biological processes can affect the temperature of the shadow a tree casts?

Assuming two trees have similar shape and leaf coverage, could differences in the biological processes among them lead to differences in the temperature of the shadow they cast? What biological ...
2
votes
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 ...
1
vote
0answers
40 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 >...
5
votes
1answer
108 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 ...
5
votes
1answer
473 views

What is the name of this big tree with look of banyan branches?

Location is India, Tree is so huge & some branches are hanging like Banyan. Its Hanging Branches look: & Finally its leaf: So what is it then?
0
votes
1answer
30 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 ...
3
votes
3answers
467 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 ...
5
votes
2answers
163 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.
4
votes
1answer
53 views

Tree identification from dried branch

I found a very interesting branch last week, and have been trying to identify it but cannot seem to find the answer. If anyone has any suggestion, I would be grateful. I found it near the forest, ...
4
votes
1answer
86 views

Santa Fe xeric indigenous tree

The hills around Santa Fe are covered in a particular xeric tree which is quite small and looks like some kind of juniper which I have been unable to identify: What is this species?
3
votes
3answers
149 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?