The two-cleft calyx and pod of Claytonia or Spring Beauty, (Gray, 1858).

Claytonia Calyx

The two-cleft calyx and pod of Claytonia or Spring Beauty, (Gray, 1858).

Ripe pod of Claytonia or Spring Beauty, cut across, and splitting into three valves (Gray, 1858).

Claytonia Pod

Ripe pod of Claytonia or Spring Beauty, cut across, and splitting into three valves (Gray, 1858).

The flower of the Marsh-Mallow.

Flower

The flower of the Marsh-Mallow.

Magnified cross-section of a flower-bud of the American Linden.

Bud

Magnified cross-section of a flower-bud of the American Linden.

A tuft of stamens with the petal-like scale of the American Linden.

Stamen

A tuft of stamens with the petal-like scale of the American Linden.

The American Linden in flower.

Flower

The American Linden in flower.

The pistil of the American Linden.

Pistil

The pistil of the American Linden.

The pistil of the American Linden, cut in two.

Pistil

The pistil of the American Linden, cut in two.

The Common Flax flower, of the Order Linaceae.

Flax

The Common Flax flower, of the Order Linaceae.

The Common Flax flower, of the Order Linaceae, cut in half.

Flower

The Common Flax flower, of the Order Linaceae, cut in half.

The flower of a Buckthorn.

Flower

The flower of a Buckthorn.

The flower of a Buckhorn, cut in half.

Flower

The flower of a Buckhorn, cut in half.

The flower of the Red Buckeye.

Red Buckeye

The flower of the Red Buckeye.

The flower of the Red Buckeye, with calyx and two petals taken away.

Red Buckeye

The flower of the Red Buckeye, with calyx and two petals taken away.

The Locust is in the Pea family. The flower is butterfly-shaped.

Locust

The Locust is in the Pea family. The flower is butterfly-shaped.

The flower of False Indigo, in the Pea family.

Pea

The flower of False Indigo, in the Pea family.

The flower of False Indigo, in the Pea family, with the petals removed.

Pea

The flower of False Indigo, in the Pea family, with the petals removed.

The flower of Amorpha, in the Pea family.

Pea

The flower of Amorpha, in the Pea family.

The flower of Amorpha, in the Pea family, with petals removed.

Pea

The flower of Amorpha, in the Pea family, with petals removed.

The flower of the American Crab-Apple.

Flower

The flower of the American Crab-Apple.

Staminate flower of a Squash, with the corolla and upper part of the calyx cut away.

Squash

Staminate flower of a Squash, with the corolla and upper part of the calyx cut away.

Staminate flower of a Squash, with the anthers cut across.

Squash

Staminate flower of a Squash, with the anthers cut across.

Passion-flower.

Flower

Passion-flower.

Garden Gooseberry with flowers.

Flower

Garden Gooseberry with flowers.

Flower of the Stonecrop.

Flower

Flower of the Stonecrop.

Part of stem, leaf and umbel of Poison-Hemlock.

Poison Hemlock

Part of stem, leaf and umbel of Poison-Hemlock.

Umbel of Poison-Hemlock.

Poison Hemlock

Umbel of Poison-Hemlock.

Magnified flower of Poison-Hemlock.

Poison Hemlock

Magnified flower of Poison-Hemlock.

Magnified fruit of Poison-Hemlock.

Poison Hemlock

Magnified fruit of Poison-Hemlock.

Magnified fruit of Poison-Hemlock, cut in half.

Poison Hemlock

Magnified fruit of Poison-Hemlock, cut in half.

Flower of the Dogwood, or Cornel.

Flower

Flower of the Dogwood, or Cornel.

Flower of the Dogwood, or Cornel.

Flower

Flower of the Dogwood, or Cornel.

Flower of the Honeysuckle.

Flower

Flower of the Honeysuckle.

Flower of the Honeysuckle.

Flower

Flower of the Honeysuckle.

Ovary of the Honeysuckle.

Flower

Ovary of the Honeysuckle.

individual flower of the Honeysuckle.

Flower

individual flower of the Honeysuckle.

Piece of Madder, in flower.

Flower

Piece of Madder, in flower.

Piece of Madder flower, cut in half.

Flower

Piece of Madder flower, cut in half.

Young fruits of Madder.

Fruit

Young fruits of Madder.

Ripe fruit of Madder.

Fruit

Ripe fruit of Madder.

Common Bluet, of the Order Rubiaceae.

Bluet

Common Bluet, of the Order Rubiaceae.

Section of a flower of the Common Bluet, of the Order Rubiaceae.

Bluet Flower

Section of a flower of the Common Bluet, of the Order Rubiaceae.

Section of a flower of the Common Bluet, of the Order Rubiaceae.

Bluet Flower

Section of a flower of the Common Bluet, of the Order Rubiaceae.

Flowers of Chickory, all with strap-shaped corollas.

Chickory Flower

Flowers of Chickory, all with strap-shaped corollas.

Head of chickory flowers, divided lengthwise and enlarged.

Chickory Flower

Head of chickory flowers, divided lengthwise and enlarged.

Half of a head of flowers of Coreopsis.

Coreopsis Flower

Half of a head of flowers of Coreopsis.

Slice of a head of flowers of Coreopsis, with one ray flower, and one perfect disk-flower with its bract ir chaff.

Coreopsis Flower

Slice of a head of flowers of Coreopsis, with one ray flower, and one perfect disk-flower with its bract…

Calyx of Chickory.

Calyx

Calyx of Chickory.

Calyx of Sunflower.

Calyx

Calyx of Sunflower.

Calyx of Helenium.

Calyx

Calyx of Helenium.

Calyx of Dandelion, showing pappus of downy hairs.

Calyx

Calyx of Dandelion, showing pappus of downy hairs.

Calyx of Sowthistle, showing pappus of downy hairs.

Calyx

Calyx of Sowthistle, showing pappus of downy hairs.

Harebells, otherwise known as bluebells are common herbaceous perennials.

Harebell

Harebells, otherwise known as bluebells are common herbaceous perennials.

The flower of the Magnolia tree.

Magnolia

The flower of the Magnolia tree.

The Fly-trap grows in swampy places, and has a flower that hinges in order to trap insects.

Venus fly-trap

The Fly-trap grows in swampy places, and has a flower that hinges in order to trap insects.

Puck finds the little purple flower.

Puck Finds the Little Purple Flower

Puck finds the little purple flower.

Capital letter "C" with flower design.

C, Capital Letter

Capital letter "C" with flower design.

Abstract border with plants.

Abstract border

Abstract border with plants.

Border with intertwined bives and birds.

Vines border

Border with intertwined bives and birds.

The hawk moth is well known by its habit of poising like a humming bird over the flower from which it is extracting the nectar by means of its long sucking tube.

Hawk Moth

The hawk moth is well known by its habit of poising like a humming bird over the flower from which it…