ClipArt ETC
"Diagrammatic section of spinal cord. p.f., Posterior fissure; p.c., posterior column of white matter; d.p.s., dorsal, posterior, sensory or afferent root; g., ganglion; v.a.m., ventral, anterior, motor or efferent root; c.n., compound spinal nerve with branches; s.g., sympathetic ganglion; a.c., anterior column--the anterior fissure is exaggerated; g.c., ganglion cells; g.m., grey matter; w.m., white matter." -Thomson, 1916

Vertebrate Spinal Cord

"Diagrammatic section of spinal cord. p.f., Posterior fissure; p.c., posterior column of white matter;…

A portion of fibrin, showing its fibrous structure and netlike arrangement of its fibers. In a short time after the blood is taken from the body it separates into two portions, by a process called coagulation or clot; the white substance which forms the upper part of the clot is called fibrin, and the red mass under it, the red particles. The fibrin is the material from which all solids of the body are formed.

Blood Clotting Fibers

A portion of fibrin, showing its fibrous structure and netlike arrangement of its fibers. In a short…

"Diagram of a cross-section of the spinal cord through the roots of spinal nerves. c, central canal; d.f., dorsal fissure; d.r., dorsal root of spinal nerve arising from the dorsal horn of the gray matter (g); gn., ganglion on the dorsal root; n, spinal nerve; v.f., ventral fissure; v.r., ventral root of the spinal nerve, arising from the ventral horn of the gray matter; w., white matter." -Galloway, 1915

Spinal Cord

"Diagram of a cross-section of the spinal cord through the roots of spinal nerves. c, central canal;…

The snakehead or Chelone glabra is an herbaceous plant used for medicinal purposes.

Snakehead

The snakehead or Chelone glabra is an herbaceous plant used for medicinal purposes.

The butterfly weed or Asclepias tuberosa is a milkweed plant used for medicinal purposes.

Butterfly Weed

The butterfly weed or Asclepias tuberosa is a milkweed plant used for medicinal purposes.

"Embryo germinating: a running into the ground to become a root; b running up to form a stem; c the tube which supplies nutriment from the cotyledons until both roots and leaves are ready to work." -Newman, 1850

Cotyledon Germinating

"Embryo germinating: a running into the ground to become a root; b running up to form a stem; c the…

This image is of a secund plant, with leaves arranged on one side only.

Secund

This image is of a secund plant, with leaves arranged on one side only.

The images are of papilionaceous leaves, shaped like a butterfly or corolla.

Papilionaceous Leaves

The images are of papilionaceous leaves, shaped like a butterfly or corolla.

"A young radish, showing seed leaves." -Newman, 1850

Radish

"A young radish, showing seed leaves." -Newman, 1850

"Bracteae.--Small leaves placed between the proper leaves of the plant and the flower-cup." -Newman, 1850

Bractea

"Bracteae.--Small leaves placed between the proper leaves of the plant and the flower-cup." -Newman,…

"Sessile.--Said of leaves seated on the stem, without footstalks." -Newman, 1850

Sessile

"Sessile.--Said of leaves seated on the stem, without footstalks." -Newman, 1850

"Connate.--Situated opposite each other, and joined at the base." -Newman, 1850

Connatum

"Connate.--Situated opposite each other, and joined at the base." -Newman, 1850

"Decurrent.--When leaves run down the stem to a point considerably below the place where they diverge from it." -Newman, 1850

Decurrent Leaf

"Decurrent.--When leaves run down the stem to a point considerably below the place where they diverge…

"Imbricate.--When leaves are laid one over another, like tiles on a roof, they are said to be imbricated." -Newman, 1850

Imbricated Leaves

"Imbricate.--When leaves are laid one over another, like tiles on a roof, they are said to be imbricated."…

Spreading leaves.

Spreading Leaves

Spreading leaves.

"Stipulae.--Two small leaves, placed usually at the base of the floral leaf, and on opposite sides of the branch." -Newman, 1850

Stipule

"Stipulae.--Two small leaves, placed usually at the base of the floral leaf, and on opposite sides of…

"Binate.--With two leaflets." -Newman, 1850

Binate

"Binate.--With two leaflets." -Newman, 1850

Opposite leaves, in adjacent pairs.

Opposite Leaves

Opposite leaves, in adjacent pairs.

Upright leaves.

Upright Leaves

Upright leaves.

"Tripinnate.--Triple rows of leaflets." -Newman, 1850

Tripinnate

"Tripinnate.--Triple rows of leaflets." -Newman, 1850

"Fascicles.--When leaves or flowers grow more than two together they are said to be fasciculated, or in fascicles." -Newman, 1850

Fascicles

"Fascicles.--When leaves or flowers grow more than two together they are said to be fasciculated, or…

A decorative doodad with feather arrows, a bow, and leaves.

Native American Doodad

A decorative doodad with feather arrows, a bow, and leaves.

A decorative divider with flowers and leaves.

Floral Divider

A decorative divider with flowers and leaves.

A decorative divider with birds, plants, and spiders.

Nature Divider

A decorative divider with birds, plants, and spiders.

A decorative divider with a vase in the center surrounded by flowers, plants, and pine cones.

Vase Divider

A decorative divider with a vase in the center surrounded by flowers, plants, and pine cones.

A decorative divider with wheat in the center, surrounded by dogs, rabbits, and other plants.

Animal Divider

A decorative divider with wheat in the center, surrounded by dogs, rabbits, and other plants.

A decorative divider with leaves, flowers, and birds.

Leaves Divider

A decorative divider with leaves, flowers, and birds.

A decorative divider with Greek statues, musical instruments, and flowers.

Greek Divider

A decorative divider with Greek statues, musical instruments, and flowers.

A decorative divider with leaves and birds.

Leaf Divider

A decorative divider with leaves and birds.

A decorative divider with leaves and birds.

Bird Divider

A decorative divider with leaves and birds.

A decorative divider with griffins, cornucopias, grapes, and leaves.

Greek Divider

A decorative divider with griffins, cornucopias, grapes, and leaves.

A decorative divider with griffins, Greek statues, and cornucopias.

Greek Divider

A decorative divider with griffins, Greek statues, and cornucopias.

The caterpillar and chrysalis stages of Pieris rapae, or Small White.

Small White Caterpillar

The caterpillar and chrysalis stages of Pieris rapae, or Small White.

The butterfly of Pieris rapae, or Small White.

Small White Butterfly

The butterfly of Pieris rapae, or Small White.

Of the Parsley family (Umbelliferae): left, cowbane (Oxypolis rigidior); right, golden Alexanders (Thaspium aureum).

Cowbane and Golden Alexanders

Of the Parsley family (Umbelliferae): left, cowbane (Oxypolis rigidior); right, golden Alexanders (Thaspium…

Of the Parsley family (Umbelliferae), the poison hemlock (Conium maculatum).

Poison Hemlock

Of the Parsley family (Umbelliferae), the poison hemlock (Conium maculatum).

Of the Parsley family (Umbelliferae), the water pennywort (Hydrocotyle Americana).

Water Pennywort

Of the Parsley family (Umbelliferae), the water pennywort (Hydrocotyle Americana).

Of the Heath family (Ericaceae), the white swamp honeysuckle (Rhododendron viscosum).

White Swamp Honeysuckle

Of the Heath family (Ericaceae), the white swamp honeysuckle (Rhododendron viscosum).

Of the Heath family (Ericaceae), the rhodora (Rhododendron canadense).

Rhodora

Of the Heath family (Ericaceae), the rhodora (Rhododendron canadense).

Of the Milkweed family (Asclepiadaceae): left, poke milkweed (Asclepias phytolaccoides); right, four-leaved milkweed (Asclepias quadrifolia).

Poke Milkweed and Four-Leaved Milkweed

Of the Milkweed family (Asclepiadaceae): left, poke milkweed (Asclepias phytolaccoides); right, four-leaved…

Of the Vervain family (Verbenaceae), the white vervain (Verbena urticaefolia).

White Vervain

Of the Vervain family (Verbenaceae), the white vervain (Verbena urticaefolia).

Of the Mint family (Labiatae), the peppermint (Mentha piperita).

Peppermint

Of the Mint family (Labiatae), the peppermint (Mentha piperita).

Of the Mint family (Labiatae), the spearmint (Mentha spicata).

Spearmint

Of the Mint family (Labiatae), the spearmint (Mentha spicata).

Of the Mint family (Labiatae), the leaf of the water mint (Mentha aquatica.

Water Mint Leaf

Of the Mint family (Labiatae), the leaf of the water mint (Mentha aquatica.

Of the Mint family (Labiatae), the lower leaf of the cut-leaved water horehound (Lycopus americanus).

Cut-Leaved Water Horehound Leaf

Of the Mint family (Labiatae), the lower leaf of the cut-leaved water horehound (Lycopus americanus).

Of the Mint family (Labiatae), the leaf of the corn mint (Mentha arvensis).

Corn Mint Leaf

Of the Mint family (Labiatae), the leaf of the corn mint (Mentha arvensis).

Of the Mint family (Labiatae), the wild mint (Mentha arvensis var. Canadensis).

Wild Mint

Of the Mint family (Labiatae), the wild mint (Mentha arvensis var. Canadensis).

Of the Mint family (Labiatae), the wild bergamot (Monarda fistulosa var. rubra).

Wild Bergamot

Of the Mint family (Labiatae), the wild bergamot (Monarda fistulosa var. rubra).

Of the Mint family (Labiatae), the self-heal (Prunella vulgaris).

Self-Heal

Of the Mint family (Labiatae), the self-heal (Prunella vulgaris).

Of the Mint family (Labiatae), the motherwort (Leonurus Cardiaca).

Motherwort

Of the Mint family (Labiatae), the motherwort (Leonurus Cardiaca).

Of the Nightshade family (Solanaceae), the black nightshade (Solanum nigrum).

Black Nightshade

Of the Nightshade family (Solanaceae), the black nightshade (Solanum nigrum).

Of the Nightshade family (Solanaceae), the purple thorn apple (Datura Tatula).

Purple Thorn Apple

Of the Nightshade family (Solanaceae), the purple thorn apple (Datura Tatula).

Of the Figwort family (Scrophulariaceae), the pentstemon (Penstemon hirsutus).

Pentstemon

Of the Figwort family (Scrophulariaceae), the pentstemon (Penstemon hirsutus).

Of the plantain family (Plantaginaceae), the English plantain (Plantago lanceolata).

English Plantain

Of the plantain family (Plantaginaceae), the English plantain (Plantago lanceolata).

Of the Honeysuckle family (Caprifoliaceae), the Indian currant (Symphoricarpos orbiculatus) and the leaves of elder (Sambucus canadensis).

Indian Currant and Elder Leaves

Of the Honeysuckle family (Caprifoliaceae), the Indian currant (Symphoricarpos orbiculatus) and the…

Of the Honeysuckle family (Caprifoliaceae), the fly-honeysuckle (Lonicera canadensis).

Fly-Honeysuckle

Of the Honeysuckle family (Caprifoliaceae), the fly-honeysuckle (Lonicera canadensis).

Of the Valerian family (Valerianaceae), the swamp valerian (Valeriana uliginosa).

Swamp Valerian

Of the Valerian family (Valerianaceae), the swamp valerian (Valeriana uliginosa).

Of the Gourd family (Cucurbitaceae), the climbing wild cucumber (Echinocystis lobata).

Climbing Wild Cucumber

Of the Gourd family (Cucurbitaceae), the climbing wild cucumber (Echinocystis lobata).

Of the Composite family (Compositae): left, white snakeroot (Eupatorium urticaefolium); right, boneset (Eupatorium perfoliatum).

White Snakeroot and Boneset

Of the Composite family (Compositae): left, white snakeroot (Eupatorium urticaefolium); right, boneset…

Of the Composite family (Compositae), the boneset (Mikania scandens).

Boneset

Of the Composite family (Compositae), the boneset (Mikania scandens).