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The term arborescence comes from French. [6] Some authors object to it on grounds that it is cumbersome to spell. [7] There is a large number of synonyms for arborescence in graph theory, including directed rooted tree, [3] [7] out-arborescence, [8] out-tree, [9] and even branching being used to denote the same concept. [9]
When a directed rooted tree has an orientation away from the root, it is called an arborescence [3] or out-tree; [11] when it has an orientation towards the root, it is called an anti-arborescence or in-tree. [11] The tree-order is the partial ordering on the vertices of a tree with u < v if and only if the unique path from the root to v passes ...
Graphs with multiple nodes designated as roots are also of some interest in combinatorics, in the area of random graphs. [4] These graphs are also called multiply rooted graphs. [5] The terms rooted directed graph or rooted digraph also see variation in definitions. The obvious transplant is to consider a digraph rooted by identifying a ...
A cypress knee is a distinctive structure forming above the roots of a cypress tree of any of various species of the subfamily Taxodioideae, such as the bald cypress. Their function is unknown, but they are generally seen on trees growing in swamps.
The roots require oxygen to respire and only a few species such as mangroves and the pond cypress (Taxodium ascendens) can live in permanently waterlogged soil. [50] In the soil, the roots encounter the hyphae of fungi. Many of these are known as mycorrhiza and form a mutualistic relationship with the tree roots. Some are specific to a single ...
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The tree is briefly deciduous, and it is during this leafless period that it blooms with umbels of large flowers ranging from creme de menthe to red in color. [17] After blooming, the trees produce several hundred 15 cm (6 in) pods containing seeds surrounded by a fluffy, yellowish fibre that is a mix of lignin and cellulose .
But since tree damage can be extensive, filing a claim does make sense in many cases. If you have proof that your neighbor knew that their tree was a risk, that’s information you should provide ...