Also known as Juniperus flaccida. A large shrub or small tree native to central and northern Mexico, as well as the extreme southwest of Texas.

Branch of Weeping Juniper

Also known as Juniperus flaccida. A large shrub or small tree native to central and northern Mexico,…

Also known as Tsuga heterophylla. A species of hemlock native to the west coast of North America.

Pine Cone of Western Hemlock

Also known as Tsuga heterophylla. A species of hemlock native to the west coast of North America.

Also known as Juniperus occidentalis. Native to the western United States.

Branch of Western Juniper

Also known as Juniperus occidentalis. Native to the western United States.

Also known as Larix occidentalis. A species of larch native to the mountains of western North America.

Western Larch Pine Cone

Also known as Larix occidentalis. A species of larch native to the mountains of western North America.

Also known as Thuja plicata. An evergreen coniferous tree native to western North America.

Branch of Western Redcedar

Also known as Thuja plicata. An evergreen coniferous tree native to western North America.

Also known as Platanus racemosa. The branch of a Western Sycamore tree, native to California.

Branch of Western Sycamore

Also known as Platanus racemosa. The branch of a Western Sycamore tree, native to California.

Also known as Pinus monticola. A pine cone of the Western White Pine tree.

Pine Cone of Western White Pine

Also known as Pinus monticola. A pine cone of the Western White Pine tree.

Also known as Alnus rhombifoiia. The branch of a White Alder tree, native to western North America.

Branch of White Alder

Also known as Alnus rhombifoiia. The branch of a White Alder tree, native to western North America.

Also known as Abies concolor. Native to the mountains of western North America.

Pine Cone of White Fir

Also known as Abies concolor. Native to the mountains of western North America.

Also known as Quercus alba. The branch of a White Oak tree, native to eastern North America.

Branch of White Oak

Also known as Quercus alba. The branch of a White Oak tree, native to eastern North America.

Also known as Picea glauca. A spruce tree native to the northern half of North America.

White Spruce Pine Cone

Also known as Picea glauca. A spruce tree native to the northern half of North America.

Also known as Juglans cinerea. A species of walnut native to the eastern United States and southeast Canada.

Branch of White Walnut Tree

Also known as Juglans cinerea. A species of walnut native to the eastern United States and southeast…

Also known as Pinus albicaulis. A pine cone from a Whitebark Pine tree.

Pine Cone of Whitebark Pine

Also known as Pinus albicaulis. A pine cone from a Whitebark Pine tree.

An illustration of a willow branch.

Willow Branch

An illustration of a willow branch.

Also known as Quercus phellos. The branch of a Willow Oak tree, native to eastern North America.

Branch of Willow Oak

Also known as Quercus phellos. The branch of a Willow Oak tree, native to eastern North America.

Large willow tree of Eurasia and North Africa having greyish canescent leaves and grey bark

White Willow

Large willow tree of Eurasia and North Africa having greyish canescent leaves and grey bark

Also known as Ulmus alata. The branch of a Winged Elm tree, native to the southern United States.

Branch of Winged Elm

Also known as Ulmus alata. The branch of a Winged Elm tree, native to the southern United States.

A winter scene with a bird in the tree.

Winter Scene

A winter scene with a bird in the tree.

Also known as Hamamelis virginiana. The branch of a Witch Hazel shrub, native to the eastern United States.

Branch of Witch Hazel

Also known as Hamamelis virginiana. The branch of a Witch Hazel shrub, native to the eastern United…

"On the walls near the lantern." — Young, 1901

Woman leaning on wall

"On the walls near the lantern." — Young, 1901

A cross-section of wood infested with insects.

Infested wood

A cross-section of wood infested with insects.

The golden-winged woodpecker is known for burrowing its own holes into live trees to use as a nest.

Golden-Winged Woodpecker

The golden-winged woodpecker is known for burrowing its own holes into live trees to use as a nest.

Chiefly making its habitat in Northern Europe, the great black woodpecker uses its long, sharp bill to bore into trees in search of insects.

Great black Woodpecker

Chiefly making its habitat in Northern Europe, the great black woodpecker uses its long, sharp bill…

Found in Southern Europe, the middle spotted woodpecker has a black coat, with a crimson underside and a red spot on its head.

Middle Spotted Woodpecker

Found in Southern Europe, the middle spotted woodpecker has a black coat, with a crimson underside and…

Also known as Betula lenta. The branch of a Yellow Birch tree, native to eastern North America.

Branch of Yellow Birch

Also known as Betula lenta. The branch of a Yellow Birch tree, native to eastern North America.

Also known as Liriodendron tulipifera. A branch of a Yellow Poplar tree, native throughout North America.

Branch of Yellow Poplar

Also known as Liriodendron tulipifera. A branch of a Yellow Poplar tree, native throughout North America.

"Taxus baccata loaded with male flowers; 1. a male flower; 2. an anther; 3. a female flower; 4. a vertical section of an ovule; 5. a ripe fruit; 6. of a ripe seed, showing the embryo." -Lindley, 1853

European Yew

"Taxus baccata loaded with male flowers; 1. a male flower; 2. an anther; 3. a female flower; 4. a vertical…

"Saxe-Gothea conspicua; 1. male spike; 2. anther; 3. scale of galbulus with ovule; 4. ripe galbulus." -Lindley, 1853

Prince Albert's Yew

"Saxe-Gothea conspicua; 1. male spike; 2. anther; 3. scale of galbulus with ovule; 4. ripe galbulus."…

Also known as Salix taxifolia. The branch of a Yewleaf Willow, native to southern Mexico and the Pacific Coast.

Branch of Yewleaf Willow

Also known as Salix taxifolia. The branch of a Yewleaf Willow, native to southern Mexico and the Pacific…

A branch of Yucca arborescens, a species in the agave family.

Branch of Yucca Arborescens

A branch of Yucca arborescens, a species in the agave family.

The branch of a Yucca faxoniana, a species of perennial shrub native to the southwest United States.

Branch of Yucca Faxoniana

The branch of a Yucca faxoniana, a species of perennial shrub native to the southwest United States.

The branch of a Yucca macrocarpa, a species of agave plant.

Branch of Yucca Macrocarpa

The branch of a Yucca macrocarpa, a species of agave plant.

The branch and fruit of a Yucca mohavensis, a species of plant from the agave family.

Branch of Yucca Mohavensis

The branch and fruit of a Yucca mohavensis, a species of plant from the agave family.

The branch of a Yucca Radiosa, a species of perennial shrub from the agave family.

Branch of Yucca Radiosa

The branch of a Yucca Radiosa, a species of perennial shrub from the agave family.

The Yucca aloifolia also known as the Aloe Yucca or Spanish Bayonet.

Aloe Yucca

The Yucca aloifolia also known as the Aloe Yucca or Spanish Bayonet.

A leaf of the Zamia, a tree from the Mesozoic time.

Zamia Leaf

A leaf of the Zamia, a tree from the Mesozoic time.

"Zizyphus Baclei. 1. a flower seen from above; 2. a fruit; 3. the same cut vertically; 4. a seed divided vertically." -Lindley, 1853

Ziziphus

"Zizyphus Baclei. 1. a flower seen from above; 2. a fruit; 3. the same cut vertically; 4. a seed divided…