Dendrology Is Cool

(A fan blog for deh thats just Evan and tree facts)

[yupthatexists]

[evansweirdtreefacts]

A tall tree

[treeporn]

Cow Pond, Windsor Great Park.

[treeporn]

The New Forest. A couple of weeks ago.

[evansweirdtreefacts]

The Friendship Oak Friendship Oak is a 500-year-old southern live oak (Quercus virginiana) located on the Gulf Park campus of the University of Southern Mississippi in Long Beach, Mississippi. The campus was formerly Gulf Park College for Women from 1921 until 1971. Friendship Oak dates from the year 1487, and was a sapling at the time that Christopher Columbus first visited the New World. According to legend, those who enter the shade of its branches will remain friends for all their lives. In the 1920s, poet Vachel Lindsay taught at Gulf Park College for Women and read poetry to students beneath the branches of Friendship Oak. Friendship Oak was the 110th tree to be registered with the Live Oak Society. At the time of registration (circa 1940), the tree's trunk circumference was 14 feet (4.3 m). In 1950, the oak was featured in a Life magazine article about Gulf Park College, where students attended classes under the tree. (Source: Wiki)

[evansweirdtreefacts]

The Oak at the Gate of the Dead (in Welsh: "Derwen Adwy'r Meirwon"), or Crogen Oak is a veteran tree in Wrexham County Borough, Wales. Located near the 8th-century Offa's Dyke, the tree is thought to be more than 1,000 years old. The tree is located on the site of the 1165 Battle of Crogen and derives its name from an association with the nearby burial of the dead from that engagement. The tree was an entrant in the 2013 European Tree of the Year awards, the first Welsh tree to be entered.

[evansweirdtreefacts]

Santa Barbara's Moreton Bay Fig Tree located in Santa Barbara, California is believed to be the largest Ficus macrophylla in the United States. A seaman visiting Santa Barbara in 1876 presented a seedling of an Australian Moreton Bay Fig tree to a local girl who planted it at 201 State Street. After the girl moved away a year later, her girlfriend, Adeline Crabb, transplanted the tree to the corner of Montecito and Chapala streets, just a few blocks from the ocean, on land then owned by the Southern Pacific Transportation Company. The tree was officially designated as a historic landmark in 1970, and the property was deeded to the City of Santa Barbara in 1976. The tree has since been placed on the California Register of Big Trees. The roots are protected by a chain barrier the size of the canopy. The tree may be viewed at the Amtrak Train Station, 209 State Street. In July 1997, the circumference of the tree, measured at a height of 4.5 feet (1.4 m) above the ground, was 41.5 feet (12.6 m). The average crown spread was 176 feet (54 m) and the total height was 80 feet (24 m). (Source: Wiki)

[evansweirdtreefacts]

The Devil’s Tree The Devil's Tree is a solitary oak tree, with some dead limbs, growing in an undeveloped field on Mountain Road in the Martinsville section of Bernards Township in Somerset County, New Jersey, United States, across from a private housing development. Local legend suggests the tree is cursed: those who damage or disrespect the tree (usually by urinating on it, or making disparaging remarks about it while nearby) will soon thereafter come to some sort of harm, often in the form of a car accident or major breakdown as they leave.

[fabled-fawn-deactivated20220819]

When you open the window at night and hear nothing but trees rustling in the wind 😩

[differentkindsofghosts]

Listen to the trees;

Sometimes you have to shed leaves,

And brave your winters.

[root]

Given a binary tree where all nodes are either 0 or 1, prune the tree so that subtrees containing all 0s are removed.

# Given a binary tree where all nodes are either 0 or 1, prune the tree so that subtrees containing all 0s are removed. # For example, given the following tree: # 0 # / \ # 1 0 # / \ # 1 0 # / \ # 0 0 # should be pruned to: # 0 # / \ # 1 0 # / # 1 # We do not remove the tree at the root or its left child because it still has a 1 as a descendant. # 0 # / \ # 0 1 # \ \ # 1 0 # / \ # 0 0 # \ # 1 # pruned: # 0 # / \ # 0 1 # \ # 1 # \ # 0 # \ # 1 # 0 # left not none, right not none # / \ # > 0 1 < # left none, is a one # \ \ # > 1 0 < # is a 1, 0.right is none and 0.left is none -> can be pruned # / \ # > 0 0 < # 0.right is none and 0.left is none -> can be pruned, 0.right not none # \ # 1 < is a 1 # we may be able to do it via a BFS/level order search and on each level check each current node # if current node.left and current node.right is none and current node.val == 0 then remove this node # For each node, first the node is visited and then it’s child nodes are put in a FIFO queue. #printLevelorder(tree) # 1) Create an empty queue q # 2) temp_node = root /*start from root*/ # 3) Loop while temp_node is not NULL # a) print temp_node->data. # b) Enqueue temp_node’s children (first left then right children) to q # c) Dequeue a node from q and assign it’s value to temp_node # q = 0 # 0 <- cant be pruned # check temp for left.none & right.none # enqueue left & right # q = 0,1 # 0.left = none but 0 .right = 1 <- cant be pruned # q = 1,1 # 1 is 1 cant be pruned # q = 1,0 # 1 is 1 cant be pruned # q = 0,0,0 # 0.left and 0.right are none <- remove this node # q = 0,0 # 0.left and 0.right are none <- remove this node # q = 0 # 0.right = 1 <-cant be pruned # q = 1 # 1 is 1 # reached end import queue as queue def prune(root): q = queue() q.append(root) while len(queue) > 0: tempNode = q.dequeue() if tempNode.left is not None: q.append(tempNode.left) if tempNode.right is not None: q.append(tempNode.right) if tempNode.val == 0 and tempNode.right is None and tempNode.left is None: pass # however we need to reconstruct the tree after pruning which would be tedious, it wouldn't affect runtime complexity but it may be seen as inefficent # A better way of doing this could be to Prune children of the tree recursively. The only decisions at each node are whether to prune the left child or the right child. # Algorithm # We'll use a function containsOne(node) that does two things: it tells us whether the subtree at this node contains a 1, and it also prunes all subtrees not containing 1. # If for example, node.left does not contain a one, then we should prune it via node.left = null. # Also, the parent needs to be checked. If for example the tree is a single node 0, the answer is an empty tree. def pruneRecursively(root): if root.val == 0 and root.left is None and root.right is None: return None root.left = pruneRecursively(root.left) root.right = pruneRecursively(root.right) return root

[linen-shroud]

The trees are my confessors, the birds singing absolvement of my sins.

[the-punstoppable-force-blog]

I noticed some trees that were going to get knocked down

I felt bad for them, I guess it’s just in my roots

[insidemisty-forest]

This calm and cozy feeling in my heart, when Im in my favourite old forest.

[landscape-lunacy]

Dartmoor, England - by Rebecca

[wetreesinart]

Colin Waeghe (Belgian, b.1980), Stand-by, 100 x 70 cm, oil on canvas

[id-that-tree]

Alright folks, tree of the day is the Southern Red Oak! Take a look at these leaves! All of these came from the same individual (my own pictures)

Quite a lot of variability! The most characteristic quality of a southern red oak leaf is its long terminal lobe, even though it’s not always present in every individual leaf. That’s why it’s always important to look at several different leaves from different parts of the tree. Shade leaves will tend to be fatter and with fewer lobes, while sun leaves will have the more characteristic deep lobing. Leaves are arranged in an alternate pattern along the branch.

Southern red oak

Quercus falcata

Family: Fagaceae (along with all other oaks, beeches, and chestnuts)

Bark: Unlike most other red oaks, the bark of the southern red oak doesn’t have any streaking and remains fairly dark all the way up the trunk. Overall it’s pretty non-distinctive. (photo from Carolina Nature)

The southern red oak produces acorns like all oak trees, and they are small compared to most other species.

Now, who is this tree? The Southern red oak is widespread across the southern United States and ranges north to Kentucky and Virginia. It competes best in poor soil–this means it would do well in good soil, but since it usually gets outcompeted there it is relegated to poor soils that other trees can’t survive in. These soils are usually in uplands, and they are droughty and acidic.

The Southern red oak usually lives to be around 150 years old and can grow to around 80 feet tall. It typically has good growth form, with a straight trunk and strong, well spaced limbs. Once you look at lots of examples and get hang of it, it’s easy to recognize an oak by its shape.

What a beauty!

(photo credit Native Tree Society)

[evansweirdtreefacts]

Great tree id!

[numb3rth30ry]

oscillating breeze

rotates the branches of the

pythagoras tree