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(1819-1892) American poet. Author of <I>Leaves of Grass.</em>

Walt Whitman

(1819-1892) American poet. Author of Leaves of Grass.

The sloth differs from all other arboreal four-legged mammals in its manner of climbing. It always has its back downward. It eats leaves and moves very slowly and deliberately.

Sloth

The sloth differs from all other arboreal four-legged mammals in its manner of climbing. It always has…

Oaks are easily recognized by their characteristic leaves and especially by their peculiar fruit, the well-known acorn.

Oak

Oaks are easily recognized by their characteristic leaves and especially by their peculiar fruit, the…

Poison-ivy, a climbing or trailing shrub with variable three-foliate leaves, aerial rootlets and greenish flowers.

Poison Ivy

Poison-ivy, a climbing or trailing shrub with variable three-foliate leaves, aerial rootlets and greenish…

These birds have long toes and claws that permit them to walk easily across leaves of tropical aquatic plants.

Jacana

These birds have long toes and claws that permit them to walk easily across leaves of tropical aquatic…

(1819-1892) American poet. Author of <I>Leaves of Grass.</em>

Walt Whitman

(1819-1892) American poet. Author of Leaves of Grass.

Galls on leaf of rose. The location of a parasite is often marked by swellings of peculiar and fantastic or beautiful forms (galls) that grow on leaves and stems.

Gall

Galls on leaf of rose. The location of a parasite is often marked by swellings of peculiar and fantastic…

Galls on leaf of rose. The location of a parasite is often marked by swellings of peculiar and fantastic or beautiful forms (galls) that grow on leaves and stems.

Gall

Galls on leaf of rose. The location of a parasite is often marked by swellings of peculiar and fantastic…

Galls on stem of grape. The location of a parasite is often marked by swellings of peculiar and fantastic or beautiful forms (galls) that grow on leaves and stems.

Gall

Galls on stem of grape. The location of a parasite is often marked by swellings of peculiar and fantastic…

A rosette of leaves of Venus's flytrap seen from above.

Venus Flytrap

A rosette of leaves of Venus's flytrap seen from above.

Here is leaf that is shaped like the head of an arrow.

Leaf

Here is leaf that is shaped like the head of an arrow.

Here is leaf that is shaped like a lance.

Leaf

Here is leaf that is shaped like a lance.

Here is leaf that is shaped like a trowel.

Leaf

Here is leaf that is shaped like a trowel.

Here is leaf that is shaped like a fiddle.

Leaf

Here is leaf that is shaped like a fiddle.

Here is a leaf that is shaped like a shield.

Leaf

Here is a leaf that is shaped like a shield.

Here is a leaf that has a tendril on the end of it which clasps around whatever it touches.

Leaf

Here is a leaf that has a tendril on the end of it which clasps around whatever it touches.

This leaf is notched all around its edge.

Leaf

This leaf is notched all around its edge.

This leaf is notched all around its edge.

Leaf

This leaf is notched all around its edge.

This leaf is spread out like a hand.

Leaf

This leaf is spread out like a hand.

This leaf is spread out like a hand.

Leaf

This leaf is spread out like a hand.

Leaves are arranged in a great many different ways on their stems. Here are three leaves together on a stem.

Leaf

Leaves are arranged in a great many different ways on their stems. Here are three leaves together on…

Leaves are arranged in a great many different ways on their stems. Here the leaf-stem has three little branches, and each branch has three leaves.

Leaf

Leaves are arranged in a great many different ways on their stems. Here the leaf-stem has three little…

Leaves are arranged in a great many different ways on their stems. On this leaf-stem are a great many leaves.

Leaf

Leaves are arranged in a great many different ways on their stems. On this leaf-stem are a great many…

Here is a leaf of the pitcher plant. You see that it has an opening at the upper end. It can hold considerable water.

Pitcher Plant Leaf

Here is a leaf of the pitcher plant. You see that it has an opening at the upper end. It can hold considerable…

Here is a leaf of the Venus's fly trap which is a spring trap for flies and other insects. Here you see the leaf as it is spread out, wide open.

Venus Fly Trap Leaf

Here is a leaf of the Venus's fly trap which is a spring trap for flies and other insects. Here you…

Here is a leaf of the Venus's fly trap which is a spring trap for flies and other insects. The two parts of the leaf close together and the points on the edges are locked together.

Venus Fly Trap Leaf

Here is a leaf of the Venus's fly trap which is a spring trap for flies and other insects. The two parts…

This is the leaf of the common fern, or brake. On the back of the leaf are spores.

Fern Leaf

This is the leaf of the common fern, or brake. On the back of the leaf are spores.

This is the bud of a Horse-Chestnut. This will open and the leaves will push out.

Horse-Chestnut Bud

This is the bud of a Horse-Chestnut. This will open and the leaves will push out.

Lilies with their stalks and leaves are in the grant of arms to Eton College

Eton College

Lilies with their stalks and leaves are in the grant of arms to Eton College

Fairy with wand standing on a leaf.

Fairy with wand

Fairy with wand standing on a leaf.

Fairy with duster standing on a leaf.

Fairy with duster

Fairy with duster standing on a leaf.

Fairy sitting on a leaf.

Fairy sitting

Fairy sitting on a leaf.

Fairy dancing on a leaf.

Fairy dancing

Fairy dancing on a leaf.

Fairy scrubbing a leaf.

Fairy scrubbing

Fairy scrubbing a leaf.

Fairy sweeping on a leaf.

Fairy sweeping

Fairy sweeping on a leaf.

Fairy sewing on a leaf.

Fairy sewing

Fairy sewing on a leaf.

Bookplate of two children reading with scenes from the book unfolding in the background.

Children Reading

Bookplate of two children reading with scenes from the book unfolding in the background.

Leaves and flowers

Leaves and flowers

Leaves and flowers

These are the unfolding leaves of White Elm, Ulmus americana, (Keeler, 1915).

White Elm Leaves

These are the unfolding leaves of White Elm, Ulmus americana, (Keeler, 1915).

These are the fruit, or samara, of White Elm, Ulmus americana, (Keeler, 1915).

White Elm Fruit

These are the fruit, or samara, of White Elm, Ulmus americana, (Keeler, 1915).

These are the fruit, or samara, of Slippery Elm, Ulmus pubescens, (Keeler, 1915).

Slippery Elm Fruit

These are the fruit, or samara, of Slippery Elm, Ulmus pubescens, (Keeler, 1915).

These are the fruit, or samara, of Cork Elm, Ulmus racemosa, (Keeler, 1915).

Cork Elm Fruit

These are the fruit, or samara, of Cork Elm, Ulmus racemosa, (Keeler, 1915).

This shows two leaves of Spanish Oak, Quercus digitata, (Keeler, 1915).

Spanish Oak Leaves

This shows two leaves of Spanish Oak, Quercus digitata, (Keeler, 1915).

This shows the unfolding leaves of the Beech branch, (Keeler, 1915).

Beech Branch

This shows the unfolding leaves of the Beech branch, (Keeler, 1915).

This shows the leaf of the Almondleaf Willow, Salix amygdaloides, (Keeler, 1915).

Almondleaf Willow Leaf

This shows the leaf of the Almondleaf Willow, Salix amygdaloides, (Keeler, 1915).

This shows the leaf of the Longleaf Willow, Salix fluviatilis, (Keeler, 1915).

Longleaf Willow Leaf

This shows the leaf of the Longleaf Willow, Salix fluviatilis, (Keeler, 1915).

This shows the staminate aments of the cottonwood, Populus deltoides (Keeler, 1915).

Cottonwood Flowers

This shows the staminate aments of the cottonwood, Populus deltoides (Keeler, 1915).

This shows the leaf of the Swamp Cottonwood, Populus heterophylla, (Keeler, 1915).

Swamp Cottonwood Leaf

This shows the leaf of the Swamp Cottonwood, Populus heterophylla, (Keeler, 1915).

This shows the cluster of five leaves of the White Pine, Pinus strobus, (Keeler, 1915).

White Pine Needles

This shows the cluster of five leaves of the White Pine, Pinus strobus, (Keeler, 1915).

This shows the cluster of two leaves of the Red Pine, Pinus resinosa, (Keeler, 1915).

Red Pine Needles

This shows the cluster of two leaves of the Red Pine, Pinus resinosa, (Keeler, 1915).

This shows the cluster of three, slightly twisted leaves of the Loblolly Pine, Pinus taeda, (Keeler, 1915).

Loblolly Pine Needles

This shows the cluster of three, slightly twisted leaves of the Loblolly Pine, Pinus taeda, (Keeler,…

This shows the cluster of three leaves of the Pitch Pine, Pinus rigida, (Keeler, 1915).

Pitch Pine Needles

This shows the cluster of three leaves of the Pitch Pine, Pinus rigida, (Keeler, 1915).

This shows the cluster of two leaves, bright green, of the Jersey Pine, Pinus virginiana, (Keeler, 1915).

Jersey Pine Needles

This shows the cluster of two leaves, bright green, of the Jersey Pine, Pinus virginiana, (Keeler, 1915).

This shows the cluster of two leaves, sometimes three of four, of the Yellow Pine, Pinus echinata, (Keeler, 1915).

Yellow Pine Needles

This shows the cluster of two leaves, sometimes three of four, of the Yellow Pine, Pinus echinata, (Keeler,…

This shows the cluster of two leaves of the Gray Pine, Pinus divaricata, (Keeler, 1915).

Gray Pine Needles

This shows the cluster of two leaves of the Gray Pine, Pinus divaricata, (Keeler, 1915).

This shows a typical leaf.

Leaves

This shows a typical leaf.

A newly germinated seed, showing the cotyledons or seed leaves, and the roots.

Seed

A newly germinated seed, showing the cotyledons or seed leaves, and the roots.

A newly germinated seed, seed leaves, and the roots.

Seedling

A newly germinated seed, seed leaves, and the roots.

A newly germinated seed, seed leaves, and the roots.

Seedling

A newly germinated seed, seed leaves, and the roots.

A newly germinated seed, seed leaves, and the roots.

Seedling

A newly germinated seed, seed leaves, and the roots.