158 illustrations of trees including: acacia, acorns, alder, alangium, Alaska willow, Allegheny chinkapin, allspice, almond, amelanchier, American amber tree, apple, arbor-vitae, arenga, Arizona cypress Arizona pine, aspen, astrocaryum, and avocado

"Apricot (Prunus Armeniaca)."-Whitney, 1902

Apricot

"Apricot (Prunus Armeniaca)."-Whitney, 1902

Illustration of a hemskirke apricot.

A Hemskirke Apricot

Illustration of a hemskirke apricot.

"Aptandra Spruceana. 1. an expanded flower; 2. a petal; 3. tube of stamens, with 4 petaloid glands at the base; 4. pistil; 5. section of ovary." -Lindley, 1853

Aptandra

"Aptandra Spruceana. 1. an expanded flower; 2. a petal; 3. tube of stamens, with 4 petaloid glands at…

"Aquilaria Agallochum. 1. a flower; 2. the same split open; 3. a section of the ovary." -Lindley, 1853

Aquilaria

"Aquilaria Agallochum. 1. a flower; 2. the same split open; 3. a section of the ovary." -Lindley, 1853

A group of trees or shrubs native to North America and Europe.

Ar'butus

A group of trees or shrubs native to North America and Europe.

A genus of the plant family Araliaceae, consisting of about 30 species of deciduous and evergreen trees and shrubs.

Aralia

A genus of the plant family Araliaceae, consisting of about 30 species of deciduous and evergreen trees…

The araucaria excelsa is commonly known as the Norfolk Island Pine. The leaves are sharply pointed, also known as awl-shaped. The leaves are bright green and densely pakced.

Araucaria Excelsa Tree

The araucaria excelsa is commonly known as the Norfolk Island Pine. The leaves are sharply pointed,…

Araucaria Imbricata is commonly known as the Monkey Puzzle. This tree grows between fifty and one hundred feet tall.

Araucaria Imbricata Tree

Araucaria Imbricata is commonly known as the Monkey Puzzle. This tree grows between fifty and one hundred…

Leaves - simple; indeterminate in position because of their smallness and closeness. They are scale-like, somewhat egg-shape, overlapping each other, and closely pressed in four rows up and down the very flat branchlets. Each leaf has at its centre a raised gland, easily distinguished if held between the eye and the light. Bark - fibrous. The "spray" (formed from the flat branchlets) is itself flat and of rather a bright green. Cones - about five twelfths of an inch in length, long oval or reverse egg-shape, nodding, yellowish-brown as they ripen, dry and opening to the base when ripe. Scales - pointless, oval or egg-shape, smooth (i. e., not pointed on the edge or near the centre.) Seeds - one to two under each scale, long and narrow (like a small caraway seed); broadly winged all around, with the wing notched at one end. Found - along the Alleghany Mountains from the high peaks of North Carolina to Northern Pennsylvania and Central New York, northward into Southern Canada and westward; along rocky banks of streams and in swamps; very common at the North, where it often occupies large areas of swamp land. It is very widely cultivated, especially in hedges. General Information - A tapering evergreen tree, twenty to fifty feet high, with close, dense branches, and a light and durable wood.

Genus Thuya, L. (Arbor Vitae)

Leaves - simple; indeterminate in position because of their smallness and closeness. They are scale-like,…

Branch of Arbor-Vitae, with awl-shaped and scale-shaped leaves.

Arbor-Vitae

Branch of Arbor-Vitae, with awl-shaped and scale-shaped leaves.

Branchlet of the American Arbor-Vitae, considerably larger than in nature, terminated by its pistillate flowers, each consisting of a single scale (an open pistil), together forming a small cone.

Arbor-Vitae

Branchlet of the American Arbor-Vitae, considerably larger than in nature, terminated by its pistillate…

One of the scales or carpels of the American Arbor-Vitae, the inside exposed to view, showing a pair of ovules on its base.

Arbor-Vitae

One of the scales or carpels of the American Arbor-Vitae, the inside exposed to view, showing a pair…

The flowers of the ardisia crenulata are a reddish violet color. There are numerous, bright berries on the flowering branches. This tree grows between three and six feet tall.

Ardisia Crenulata Flowering Branch

The flowers of the ardisia crenulata are a reddish violet color. There are numerous, bright berries…

"Areng. It yields a black bristly fiber resembling horse hair, which makes excellent cordage, and is known as gonuto or gonuti fiber."-Whitney, 1902

Arenga

"Areng. It yields a black bristly fiber resembling horse hair, which makes excellent cordage, and is…

Small tree with upswept branches.

Sorbus Aria

Small tree with upswept branches.

Also known as Alnus oblongifolia. The branch of an Arizona Alder tree, native to southwestern United States and Mexico.

Branch of Arizona Alder

Also known as Alnus oblongifolia. The branch of an Arizona Alder tree, native to southwestern United…

Also known as Cupressus arizonica. A species of cypress found in the southwest of North America.

Branch of Arizona Cypress

Also known as Cupressus arizonica. A species of cypress found in the southwest of North America.

Also known as Pinus arizonica. The pine cone of an Arizona Pine tree.

Pine Cone of Arizona Pine

Also known as Pinus arizonica. The pine cone of an Arizona Pine tree.

Also known as Vauquelinia californica. The branch of an Arizona Rosewood tree, native to the southwestern United States.

Branch of Arizona Rosewood

Also known as Vauquelinia californica. The branch of an Arizona Rosewood tree, native to the southwestern…

Also known as Platanus wrightii. The branch of an Arizona Sycamore, native to Arizona and New Mexico.

Branch of Arizona Sycamore

Also known as Platanus wrightii. The branch of an Arizona Sycamore, native to Arizona and New Mexico.

Also known as Quercus arizonica. The branch of an Arizona White Oak, native to the southwest United States.

Branch of Arizona White Oak

Also known as Quercus arizonica. The branch of an Arizona White Oak, native to the southwest United…

Also known as Salix lasiolepis. The branch of an Arroyo Willow tree, native to western and southwestern North America.

Branch of Arroyo Willow

Also known as Salix lasiolepis. The branch of an Arroyo Willow tree, native to western and southwestern…

Leaves - compound (odd-feathered; leaflets, three, sometimes five, rarely seven); opposite; edge of leaflet remotely and unequally coarse-toothed. Outline - of leaflets, egg-shape or oval. Apex - taper-pointed. Base - variable and often uneven. Leaflets - slightly rough; the ribs very marked. Bark - of young trunks, smoothish and yellowish-green; twigs, light green. Flowers - small and greenish, in delicate, drooping clusters from the sides of the branches. Fruit - large, yellowish-green, smooth, in long, loose, late-hanging clusters. Found - North, South, and West. One of the most widely distributed of the North American trees, with its finest growth in the region of the Wabash and Cumberland rivers. General Information - A tree twenty to thirty feet high, with spreading branches. Its wood is light and of slight value.

Genus Negundo, Moench

Leaves - compound (odd-feathered; leaflets, three, sometimes five, rarely seven); opposite; edge of…

"A tree which grows plentifully in Europe and in Siberia. It is a native of Britain, and is frequent in Scotland, where it is found even at an elevation of 1500 feet above the sea. It has recieved the specific name tremula, from the readiness with which its leaves are thrown into a tremulous motion by the slightest breath of wind. a, a portion of a branch with catkins; b, do., with leaves." — Chambers' Encyclopedia, 1875

Aspen

"A tree which grows plentifully in Europe and in Siberia. It is a native of Britain, and is frequent…

Staminate catkins of the common aspen

Aspen

Staminate catkins of the common aspen

The female flowers of a catkin from the Common Aspen (Populus tremula).

Common Aspen

The female flowers of a catkin from the Common Aspen (Populus tremula).

Also known as Populus tremula. A medium-sized tree growing up to 10-25 meters tall.

Aspen

Also known as Populus tremula. A medium-sized tree growing up to 10-25 meters tall.

Leaves - simple; alternate; edge sharp-toothed, with rounded hollows between. Outline - rounded. Apex - short, sharp-pointed. Base - slightly heart-shaped. Leaf/Stem - slender and very much flattened sidewise. Leaf - two to two and a half inches wide, and usually about one half inch shorter than wide; dark green; smooth on both sides when mature, with a slight down on the edge. Ribs distinct above and below and whitish. Bark - of trunk, greenish-white and smooth, often with blotches of very dark brown, especially under the ends of the branches. The bark is exceedingly bitter. Found - from Northern Kentucky and the mountains of Pennsylvania northward to Hudson Bay and Newfoundland, northwest to the Arctic Ocean, and along the Rocky Mountain slopes. It is the most widely distributed of North American Trees.  General Information - A tree twenty to fifty feet high, with white, soft wood that is largely used in place of rags in making coarse paper. The tremulousness of its foliage, which the slightest breeze stirs, is due to the thinness of the sidewise-flattened leaf-stems. Tradition accounts differently for the motion of the leaves. It says that the wood of the aspen tree was taken for the Saviour's cross, and that, ever since, the tree has shivered. Another tradition claims that, when Christ went by on his way to Calvary, all the trees sympathized and mourned, excepting the aspen; but when he died, there fell upon the aspen a sudden horror of remorse, and such a fearful trembling as has never passed away. In describing the occupations of the fifty maidens in the hall of the "gorgeous palace" of King Alcinous, Homer says: "...some wove the web, Or twirled the spindle, sitting, with a quick, Light motion like the aspen's glancing leaves."

Genus Populus, L. (Aspen, Poplar)

Leaves - simple; alternate; edge sharp-toothed, with rounded hollows between. Outline - rounded. Apex…

"A genus of Palms, of which about sixeen species are known, natives of tropical America, remarkable for the abundance of acute and formidable spines, in some cases, a foot long, with which almost every part- stem, leaves, spathe, and fruit-stalk-is armed." — Chambers' Encyclopedia, 1875

Astrocaryum

"A genus of Palms, of which about sixeen species are known, natives of tropical America, remarkable…

Also known as Chamaecyparis thyoides. Native to the eastern part of the United States.

Branch of Atlantic White Cypress

Also known as Chamaecyparis thyoides. Native to the eastern part of the United States.

This weed is native to the United States and features yellow flowers.

Senecio Aureus

This weed is native to the United States and features yellow flowers.

Also known as the cabbage tree. They are endemic to New Zealand and can grow up to 66 feet in height. The trunk is stout and the leaves are sword-like.

Dracaena Australis

Also known as the cabbage tree. They are endemic to New Zealand and can grow up to 66 feet in height.…

An auxiliary bud, concealed under the hollowed base of the leafstalk, in Buttonwood or Plane-tree.

Auxiliary Bud

An auxiliary bud, concealed under the hollowed base of the leafstalk, in Buttonwood or Plane-tree.

The fruit, flower, and branch of the avocado tree.

Avocado

The fruit, flower, and branch of the avocado tree.

A tree native to Central America and Mexico. Ranges from 1 to 2 pounds in weights and is mostly purple in color when ripe.

Avocado

A tree native to Central America and Mexico. Ranges from 1 to 2 pounds in weights and is mostly purple…

"Lophira alata. a an anther; b a perpendicular section of an ovary; e a fruit; d a perpendicular section of a fruit." -Lindley, 1853

Azobe

"Lophira alata. a an anther; b a perpendicular section of an ovary; e a fruit; d a perpendicular section…

Plant body of small overlapping scales.

Azolla

Plant body of small overlapping scales.

The apricot is a stone fruit, but contains less acid than most stone fruits. Unlike other fruits, there are a limited number of varieties of apricot.

Fruiting Branch of Apricot

The apricot is a stone fruit, but contains less acid than most stone fruits. Unlike other fruits, there…