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These are the seeds of the Box Elder, Acer negundo, (Keeler, 1915).

Box Elder Seeds

These are the seeds of the Box Elder, Acer negundo, (Keeler, 1915).

A key or key-fruit (called by Botanists a Samara) is like an akene or nut, only it is winged. This is a pair of keys.

Key

A key or key-fruit (called by Botanists a Samara) is like an akene or nut, only it is winged. This is…

"Longitudinal tangential section of [maple], showing the ends of the medullary rays." - Century, 1889

Longitudinal Tangential Section of Maple

"Longitudinal tangential section of [maple], showing the ends of the medullary rays." - Century, 1889

"The sugar maple tree resembles the sycamore, and abounds in the northern parts of the United States, and in the British possessions, where large quantities of sugar are made. "-Lupton

Gathering Sap to make Maple Sugar

"The sugar maple tree resembles the sycamore, and abounds in the northern parts of the United States,…

A class of trees belonging to the genus acer, containing about eighty species, all of which are confined to the north temperate zone.

Maple

A class of trees belonging to the genus acer, containing about eighty species, all of which are confined…

A frame of maple leaves.

Maple Leaf

A frame of maple leaves.

Acer ginnala grows twenty feet tall. The leaves are three lobes. The flowers are yellowish and fragrant.

Acer Ginnala

Acer ginnala grows twenty feet tall. The leaves are three lobes. The flowers are yellowish and fragrant.

The leaves of acer japonicum are 7-11 lobed and 3-6 inches across. The leaves are light green with silky hairs.

Acer Japonicum

The leaves of acer japonicum are 7-11 lobed and 3-6 inches across. The leaves are light green with silky…

Acer miyabei is a variety of maple. The tree grows up to forty feet tall and the branches are corky. The leaves are five lobed.

Acer Miyabei

Acer miyabei is a variety of maple. The tree grows up to forty feet tall and the branches are corky.…

The acer nikoense tree is forty feet tall. The branchlets are covered in fine, short hairs. The leaflets are oval shaped and short stalked.

Acer Nikoense

The acer nikoense tree is forty feet tall. The branchlets are covered in fine, short hairs. The leaflets…

The common names of acer saccharinum are white or silver maple. The tree is large, about one hundred twenty feet tall. The leaves are deeply five lobed. The leaves are green above, silvery white beneath, and four to six inches long.

Acer Saccharinum

The common names of acer saccharinum are white or silver maple. The tree is large, about one hundred…

The common names of <i>Acer negundo</i> are ash-leaved maple and box elder. Pictured is a raceme of the young fruit of the tree.

Ash-Leaved Maple

The common names of Acer negundo are ash-leaved maple and box elder. Pictured is a raceme of the young…

Black sugar maple is the common name of acer nigrum. The leaves are generally three lobed and five to six inches across. The tree has black bark.

Black Sugar Maple

Black sugar maple is the common name of acer nigrum. The leaves are generally three lobed and five to…

Common sugar maple and rock maple are the common names of acer saccharum. The leaves are 3-5 lobed and 3-6 inches long.

Common Sugar Maple

Common sugar maple and rock maple are the common names of acer saccharum. The leaves are 3-5 lobed and…

An illustration of the cotyledon of a maple. A cotyledon is a significant part of the embryo within the seed of a plant. Upon germination, the cotyledon may become the embryonic first leaves of a seedling.

Cotyledon of a Maple

An illustration of the cotyledon of a maple. A cotyledon is a significant part of the embryo within…

The Leaf of Maple designs were often used on friezes, cornices, and columns.

Leaf of Maple

The Leaf of Maple designs were often used on friezes, cornices, and columns.

Pictured is an upright tip shoot of Norway maple. Norway maple is the common name of <i>Acer platanoides</i>. The leaves are five lobed and light green.

Norway Maple

Pictured is an upright tip shoot of Norway maple. Norway maple is the common name of Acer platanoides.…

Pictured is a pasture maple in autumn, showing the strong framework.

Pasture Maple

Pictured is a pasture maple in autumn, showing the strong framework.

Red maple is the common name of acer rubrum. It is also known as scarlet or swamp maple. The flowers are red or scarlet. The flowers have five petals.

Red Maple

Red maple is the common name of acer rubrum. It is also known as scarlet or swamp maple. The flowers…

They are among the most prized of trees for park and street planting, and nearly all of them become finely colored in autumn.

Sugar Maple

They are among the most prized of trees for park and street planting, and nearly all of them become…

Pictured is a pasture tree of sugar maple. The tree is more flatter topped than usual. Sugar maple is the common name of acer saccharum.

Sugar Maple

Pictured is a pasture tree of sugar maple. The tree is more flatter topped than usual. Sugar maple is…

Pictured are several varieties of Japanese maple. These varieties include (a) acer palmatum, (b) acer japonicum, (c) acer palmatum variation atropurpureum, (d) variation ornatum, (e) variation Thunbergii, and (f) variation dissectum.

Japanese Maples

Pictured are several varieties of Japanese maple. These varieties include (a) acer palmatum, (b) acer…

Pictured is a group of old sugar maples with irregular and broken heads.

Old Sugar Maples

Pictured is a group of old sugar maples with irregular and broken heads.

"Longitudinal radial section through the wood of a branch of maple one year old: P, pith; B, bark." -Century, 1889 In botany, Medullary rays refer to a characteristic found in woods. In this context the term refers to radial sheets or ribbons extending vertically through the tree across and perpendicular to the growth rings. Also called pith rays or wood rays, these formations of primarily parenchyma cells allow the radial transmission of sap.

Medullary Rays of Maple

"Longitudinal radial section through the wood of a branch of maple one year old: P, pith; B, bark."…

Pictured are mite galls on maple. The galls are malformations or swellings caused by the insect.

Mite Galls on Maple

Pictured are mite galls on maple. The galls are malformations or swellings caused by the insect.

An illustration of a sugar-maple moth. A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. The differences between butterflies and moths are more than just taxonomy.

Sugar-Maple Moth

An illustration of a sugar-maple moth. A moth is an insect closely related to the butterfly, both being…

The seeds of the Mountain Maple, Acer spicatum, (Keeler, 1915).

Mountain Maple Seed

The seeds of the Mountain Maple, Acer spicatum, (Keeler, 1915).

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as mahogany, maple, and walnut. It is referred to as piper over-grainer because of the way the bristles are clumped together on the brush.

Piped Overgrainer

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as…

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as mahogany, maple, and walnut. It is referred to as piper over-grainer because of the way the bristles are clumped together on the brush.

Piped Overgrainer

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as…

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as mahogany, maple, and walnut. It is referred to as piper over-grainer because of the way the bristles are clumped together on the brush.

Piped Overgrainer

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as…

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as mahogany, maple, and walnut. It is referred to as piper over-grainer because of the way the bristles are clumped together on the brush.

Piped Overgrainer

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as…

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as mahogany, maple, and walnut. It is referred to as piper over-grainer because of the way the bristles are clumped together on the brush.

Piped Overgrainer

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as…

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as mahogany, maple, and walnut. It is referred to as piper over-grainer because of the way the bristles are clumped together on the brush.

Piped Overgrainer

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as…

This is a 6 part pipe over-grainer. It is used to create the shaped grain found in hardwoods such as mahogany, maple, and walnut. It is referred to as a piper over-grainer because of the way the bristles are clumped together on the brush.

Piped Overgrainer

This is a 6 part pipe over-grainer. It is used to create the shaped grain found in hardwoods such as…

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as mahogany, maple, and walnut. It is referred to as piper over-grainer because of the way the bristles are clumped together on the brush.

Piped Overgrainer

The piped over-grainer is a brush that is used to create the shaped grain found in hardwoods such as…

A parlor, bedroom or sitting room table made out of maple.

Parlor Table

A parlor, bedroom or sitting room table made out of maple.

A parlor, bedroom or sitting room table made out of maple.

Parlor Table

A parlor, bedroom or sitting room table made out of maple.

A parlor, bedroom or sitting room table made out of maple.

Parlor Table

A parlor, bedroom or sitting room table made out of maple.

A parlor, bedroom or sitting room table made out of maple.

Parlor Table

A parlor, bedroom or sitting room table made out of maple.

The seeds of the Red Maple, Acer rubrum, (Keeler, 1915).

Red Maple Seed

The seeds of the Red Maple, Acer rubrum, (Keeler, 1915).

The staminate flowers of the Silver Maple, Acer saccharinum, (Keeler, 1915).

Silver Maple Flower

The staminate flowers of the Silver Maple, Acer saccharinum, (Keeler, 1915).

The pistillate flowers of the Silver Maple, Acer saccharinum, (Keeler, 1915).

Silver Maple Flower

The pistillate flowers of the Silver Maple, Acer saccharinum, (Keeler, 1915).

The seeds of the Silver Maple, Acer saccharinum, (Keeler, 1915).

Silver Maple Seed

The seeds of the Silver Maple, Acer saccharinum, (Keeler, 1915).

"The maple spot gall, so common on the leaves of the red maple, is made by the fungus-gnat of the order Diptera." &mdash; Davison, 1906

Maple spot gall

"The maple spot gall, so common on the leaves of the red maple, is made by the fungus-gnat of the order…

The seeds of the Striped Maple, Acer pennsylvanicum, (Keeler, 1915).

Striped Maple seed

The seeds of the Striped Maple, Acer pennsylvanicum, (Keeler, 1915).

The seeds of the Sugar Maple, Acer saccharum, (Keeler, 1915).

Sugar Maple seed

The seeds of the Sugar Maple, Acer saccharum, (Keeler, 1915).