Large branches are known as
boughs and small branches are known as
twigs. The term
twig usually refers to a
terminus, while
bough refers only to branches coming directly from the
trunk. Due to a broad range of species of trees, branches and twigs can be found in many different shapes and sizes. While branches can be nearly
horizontal, vertical, or
diagonal, the majority of trees have upwardly diagonal branches. A number of mathematical properties are associated with tree branchings; they are natural examples of
fractal patterns in nature, and, as observed by
Leonardo da Vinci, their
cross-sectional areas closely follow the
da Vinci branching rule.
Specific terms A bough can also be called a
limb or
arm, and though these are arguably
metaphors, both are widely accepted
synonyms for bough. A
crotch or
fork is an area where a trunk splits into two or more boughs. A
twig is frequently referred to as a
sprig as well, especially when it has been plucked. Other words for twig include
branchlet,
spray, and
surcle, as well as the technical terms
surculus and
ramulus. Branches found under larger branches can be called
underbranches. Some branches from specific trees have their own names, such as
osiers and
withes or
withies, which come from
willows. Often trees have certain words which, in English, are naturally
collocated, such as
holly and
mistletoe, which usually employ the phrase "sprig of" (as in, a "sprig of mistletoe"). Similarly, the branch of a
cherry tree is generally referred to as a "cherry branch", while other such formations (i.e., "
acacia branch" or "
orange branch") carry no such alliance. A good example of this versatility is
oak, which could be referred to as variously an "oak branch", an "oaken branch", a "branch of oak", or the "branch of an oak tree". Once a branch has been cut or in any other way removed from its source, it is most commonly referred to as a
stick, and a stick employed for some purpose (such as
walking,
spanking, or
beating) is often called a
rod. Thin, flexible sticks are called
switches,
wands,
shrags, or
vimina (singular
vimen). ==See also==