A flowering branch of the Blue Gum Tree (Eucalyptus globulus), a tree in the Myrtaceae family of evergreen plants.

Blue Gum

A flowering branch of the Blue Gum Tree (Eucalyptus globulus), a tree in the Myrtaceae family of evergreen…

Several sparrow-hawks roosting on a branch.

Sparrowhawks

Several sparrow-hawks roosting on a branch.

An illustration of the hemlock spruce's seed, cone, and foliage.

Hemlock Spruce Cone, Seed and Foliage

An illustration of the hemlock spruce's seed, cone, and foliage.

The branch of a Hicoria texana, a species of pecan tree.

Branch of Hicoria Texana

The branch of a Hicoria texana, a species of pecan tree.

The branch of a Hicoria villosa tree, a species of hickory.

Branch of Hicoria Villosa

The branch of a Hicoria villosa tree, a species of hickory.

"Hippocratea Arnottiana. 1. a flower; 2. a cross section of the ovary; 3. ripe fruit." -Lindley, 1853

Hippocratea

"Hippocratea Arnottiana. 1. a flower; 2. a cross section of the ovary; 3. ripe fruit." -Lindley, 1853

"Branch and Pod of Honey-locust (Gleditschia triacanthos). GLEDITSCHIA. A genus of leguminous thorny trees, with abruptly once or twice pinnate leaves, inconspicuous greenish and polygamous flowers, and flat pods." -Whitney, 1911

Honey Locust

"Branch and Pod of Honey-locust (Gleditschia triacanthos). GLEDITSCHIA. A genus of leguminous thorny…

Also known as Salix hookeriana. The branch of a Hooker's Willow tree, native to the west coast of North America.

Branch of Hooker's Willow

Also known as Salix hookeriana. The branch of a Hooker's Willow tree, native to the west coast of North…

This shows the pistillate and staminate aments of Hop Hornbeam, Ostrya virginiana, (Keeler, 1915).

Hop Hornbeam Flowers

This shows the pistillate and staminate aments of Hop Hornbeam, Ostrya virginiana, (Keeler, 1915).

"Pruning for Horizontally-Trained Tree." — Encyclopedia Britannica, 1893

Horizontal Shaped Pruning

"Pruning for Horizontally-Trained Tree." — Encyclopedia Britannica, 1893

"Pruning for Horizontally-Trained Tree, Third Year." — Encyclopedia Britannica, 1893

Horizontal Shaped Pruning

"Pruning for Horizontally-Trained Tree, Third Year." — Encyclopedia Britannica, 1893

"Pruning for Horizontally-Trained Tree, Fifth Year." — Encyclopedia Britannica, 1893

Horizontal Shaped Pruning

"Pruning for Horizontally-Trained Tree, Fifth Year." — Encyclopedia Britannica, 1893

"Horizontal Training." — Encyclopedia Britannica, 1893

Horizontal Training

"Horizontal Training." — Encyclopedia Britannica, 1893

"Forms of Horizontal Training." — Encyclopedia Britannica, 1893

Horizontal Training

"Forms of Horizontal Training." — Encyclopedia Britannica, 1893

An illustration of the hornbeam branch.

Hornbeam Branch

An illustration of the hornbeam branch.

This shows the pistillate and staminate aments of Hornbeam, Carpinus caroliniana, (Keeler, 1915).

Hornbeam Flowers

This shows the pistillate and staminate aments of Hornbeam, Carpinus caroliniana, (Keeler, 1915).

A concave hornbill perched on a branch, with mountains rising behind it.

Concave Hornbill

A concave hornbill perched on a branch, with mountains rising behind it.

An illustration of a horse chestnut shot.

Horse Chestnut Shoot

An illustration of a horse chestnut shot.

The Huito (Genipa americana) is a small tree with edible fruit in the madder family, Rubiaceae.

Huito

The Huito (Genipa americana) is a small tree with edible fruit in the madder family, Rubiaceae.

A pair of topaz hummingbirds, with their nest and eggs.

Topaz Hummingbird

A pair of topaz hummingbirds, with their nest and eggs.

A picture depicting a multitude of hummingbirds.

Hummingbirds

A picture depicting a multitude of hummingbirds.

A trio of hummingbirds resting on a branch, one of which is in a nest.

Hummingbirds

A trio of hummingbirds resting on a branch, one of which is in a nest.

A group of humming birds with particularly long and narrow beaks, well-adapted for sipping nectar from flowers.

Hummingbirds

A group of humming birds with particularly long and narrow beaks, well-adapted for sipping nectar from…

A group of humming birds, two of which are vying for a flower's nectar.

Hummingbirds

A group of humming birds, two of which are vying for a flower's nectar.

Four humming birds, two of which are resting on a branch, while the other two cavort in the air above.

Hummingbirds

Four humming birds, two of which are resting on a branch, while the other two cavort in the air above.

The fruit of idesia polycarpa are orange and grow in drooping clusters. The fruit are pea size. The leaves are large and heart shaped.

Branch of Idesia Polycarpa

The fruit of idesia polycarpa are orange and grow in drooping clusters. The fruit are pea size. The…

Also known as Libocedrus decurrens.

Branch of Incense Cedar

Also known as Libocedrus decurrens.

Also known as Quercus wislizeni. The branch of an Interior Live Oak tree, native to California.

Branch of Interior Live Oak

Also known as Quercus wislizeni. The branch of an Interior Live Oak tree, native to California.

Also known as Quercus tomentella. The branch of an Island Oak tree, native to the coast of Caifornia.

Branch of Island Oak

Also known as Quercus tomentella. The branch of an Island Oak tree, native to the coast of Caifornia.

The common ivy is a wellknown native of Britian and most parts of Europe and some parts of America. It has long, creeping, branched stems, climbing on trees and walls to a great height, by means of rootlets which cling to rough surfaces.

Ivy

The common ivy is a wellknown native of Britian and most parts of Europe and some parts of America.…

"1. Hedera Helix; 2. a flower of Dimorphanthus edulis; 3. perpendicular section of the ovary; 4. undivided ovary; 5. ripe fruit; 6. cross section of it; 7. section of seed of H. Helix." -Lindley, 1853

Ivy

"1. Hedera Helix; 2. a flower of Dimorphanthus edulis; 3. perpendicular section of the ovary; 4. undivided…

The Yellow Jasmine (Gelsemium sempervirens) is a vine in the Gelsemiaceae family.

Yellow Jasmine

The Yellow Jasmine (Gelsemium sempervirens) is a vine in the Gelsemiaceae family.

The branch of a Juglans rupestris, a species of walnut tree.

Branch of Juglans Rupestris

The branch of a Juglans rupestris, a species of walnut tree.

Also known as Amelanchier canadensis. The branch of a Juneberry bush, native to eastern North America, primarily Canada.

Branch of Juneberry

Also known as Amelanchier canadensis. The branch of a Juneberry bush, native to eastern North America,…

An illustration of a juniper branch, vertical section of fruit (1), and male catkin (2). Junipers are coniferous plants in the genus Juniperus of the cypress family Cupressaceae. Depending on taxonomic viewpoint, there are between 50-67 species of juniper, widely distributed throughout the northern hemisphere, from the Arctic, south to tropical Africa in the Old World, and to the mountains of Central America

Juniper

An illustration of a juniper branch, vertical section of fruit (1), and male catkin (2). Junipers are…

A species of conifer found in The Bahamas, Cuba, Haiti, and Jamaica.

Branch of Juniperus Barbadensis

A species of conifer found in The Bahamas, Cuba, Haiti, and Jamaica.

Also known as Betula kenaica. A species of birch tree.

Branch of Kenai Birch

Also known as Betula kenaica. A species of birch tree.

A lesser kestrel on a branch, eating a smaller bird.

Lesser Kestrel

A lesser kestrel on a branch, eating a smaller bird.

Catha edulis or Khat is a flowering plant of the Celastraceae family.

Khat

Catha edulis or Khat is a flowering plant of the Celastraceae family.

Also known as Populus grandidentata. The branch of a Large-Tooth Aspen, native to eastern North America.

Branch of Large-Tooth Aspen

Also known as Populus grandidentata. The branch of a Large-Tooth Aspen, native to eastern North America.

The Delphinium tricorne or Dwarf Larkspur: "1. petals and stamens; 2. carpels; 3. a branch of ripe fruit." -Lindley, 1853

Dwarf Larkspur

The Delphinium tricorne or Dwarf Larkspur: "1. petals and stamens; 2. carpels; 3. a branch of ripe fruit."…

"Lecythis ovata. 1. a flower divided perpendicularly; 2. a stamen." -Lindley, 1853

Lecythis

"Lecythis ovata. 1. a flower divided perpendicularly; 2. a stamen." -Lindley, 1853

An illustration of an linden branch.

Linden Branch

An illustration of an linden branch.

"London City and Midland Bank, Ludgate Hill Branch." — The Encyclopedia Britannica, 1910

London City

"London City and Midland Bank, Ludgate Hill Branch." — The Encyclopedia Britannica, 1910

The branch of a Lyonothamnus tree, which is native to the Channel Islands of California.

Branch of Lyonothamnus

The branch of a Lyonothamnus tree, which is native to the Channel Islands of California.

A group of macaws, a species of parrots native to South America.

Macaws

A group of macaws, a species of parrots native to South America.

<i>Scytalopus magellanicus</i>. "A genus of South American formicarioid passerine birds, of the family <i>Pteroptochidae</i>. <i>S. magellanicus</i> is curiously similar to wrens in general appearance and habits, though belonging to a different suborder of birds." —Whitney, 1889
<p>This illustration features a darkly colored bird sitting on a branch with small leaves.

Magellanic Tapaculo

Scytalopus magellanicus. "A genus of South American formicarioid passerine birds, of the family Pteroptochidae.…

The branch of a Magnolia acuminata cordata, mostly found on the Blue Ridge in South Carolina.

Branch of Magnolia Acuminata Cordata

The branch of a Magnolia acuminata cordata, mostly found on the Blue Ridge in South Carolina.

The image shows a fascicle (bundle or cluster) of flowers of a mallow plant (Malvaceae).

Fascicle of Mallow Flowers

The image shows a fascicle (bundle or cluster) of flowers of a mallow plant (Malvaceae).

The branch of a Malus rivularis tree, native throughout the northwestern coast of the United States.

Branch of Malus Rivularis

The branch of a Malus rivularis tree, native throughout the northwestern coast of the United States.

"1. Medinilla macrocarpa; 2. stamens of M. radicans; 3. perpendicular section of its ovary; 4. a section of its seed; 5. embryo." -Lindley. 1853

Medinilla

"1. Medinilla macrocarpa; 2. stamens of M. radicans; 3. perpendicular section of its ovary; 4. a section…

The flowers of mesembryanthemum acinaciforme are large and reddish. The flowers grow alone at the ends of the stems. The flowers bloom in August.

Branch and Detached Leaf of Mesembryanthemum Acinaciforme

The flowers of mesembryanthemum acinaciforme are large and reddish. The flowers grow alone at the ends…

Pictured are the habit, detached flower, and a portion of the branch with leaves of mesembryanthemum coccineum. The flowers are scarlet and grow alone on the stems. The flowers bloom from May to September.

Mesembryanthemum Coccineum

Pictured are the habit, detached flower, and a portion of the branch with leaves of mesembryanthemum…

Also known as Morus celtidifolia. The branch of a Mexican Mulberry tree.

Branch of Mexican Mulberry

Also known as Morus celtidifolia. The branch of a Mexican Mulberry tree.

Also known as Populus mexicana. A branch of a Mexico Poplar tree.

Branch of Mexico Poplar

Also known as Populus mexicana. A branch of a Mexico Poplar tree.

The skyline of the battle field with military important features labeled.

Military Landscape

The skyline of the battle field with military important features labeled.

The stem of the mock strawberry (Duchesnea indica), a flowering plant that gets its name from its fruit's resemblance to the strawberry.

Mock Strawberry

The stem of the mock strawberry (Duchesnea indica), a flowering plant that gets its name from its fruit's…

Also known as Hicoria alba. The branch of a Mockernut Hickory tree, the most abundant of the hickory species.

Branch of Mockernut Hickory

Also known as Hicoria alba. The branch of a Mockernut Hickory tree, the most abundant of the hickory…

"Modified Fan Training." &mdash; Encyclopedia Britannica, 1893

Modified Fan Training

"Modified Fan Training." — Encyclopedia Britannica, 1893

Also known as Cupressus macrocarpa. A species of cypress that is endemic to the Central Coast of California.

Branch of Monterey Cypress

Also known as Cupressus macrocarpa. A species of cypress that is endemic to the Central Coast of California.