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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 Sunflower.

Calyx

Calyx of Sunflower.

"Section of Head of Sunflower. a, receptacle, or anthoclinium."-Whitney, 1902

Sunflower

"Section of Head of Sunflower. a, receptacle, or anthoclinium."-Whitney, 1902

A genus of plants of the aster family, which have large, cordate leaves and terminal, flat, circular, heads of flowers. They are herbaceous plants.

Sunflower

A genus of plants of the aster family, which have large, cordate leaves and terminal, flat, circular,…

A genus of plants native to Mexico and Central America. Unable to endure frost.

Dahlia

A genus of plants native to Mexico and Central America. Unable to endure frost.

Of Sunflower (pappus of two deciduous scales).

Sunflower

Of Sunflower (pappus of two deciduous scales).

A boy and a girl are gardening sunflowers.

Gardening

A boy and a girl are gardening sunflowers.

Of the Composite family (Compositae), the ten-petaled sunflower (Helianthus decapetalus).

Ten-Petaled Sunflower

Of the Composite family (Compositae), the ten-petaled sunflower (Helianthus decapetalus).

Next to the choroid and comprising about 1/4 the entire thickness of the retina is a multitude of transparent, colorless, microscopic rods (a) evenly arranged and packed side by side, like the seeds in the disk of a sunflower. Among them at regular intervals, are interspersed the cones (b). Delicate nerve fibers pass from the ends of the rods and cones, each expanding into a granular body (c) thence weaving a mesh (d) and again expanding into the granules (f). Last is a layer of fine nerve fibers (g) and gray, ganglionic cells (h) like the gray matter of the brain, whence filaments extend into the fibers of the optic nerve (i).

The Structure of the Retina

Next to the choroid and comprising about 1/4 the entire thickness of the retina is a multitude of transparent,…

The name Chamomile or Camomile means "earth-apple", because of the applelike scent of the plant. It can refer to any of several distinct species in the sunflower family (Asteraceae): The Chamomile flower is most often consumed in the form of a bitter herb tea infusion. Taken internally, the infusion's effects include calming of the digestive tract, and easing of the spasms of irritable bowel syndrome, nocturnal cramps and period pains. It's a relaxant and sedative, so it is often taken against insomnia or anxiety. The infusion can be used externally to reduce minor skin irritation because of its mild antiseptic effect and it lightens the hair. Ingestion of the dried flowers has an emetic effect. See Matricaria recutita for more complete details.

Chamomile

The name Chamomile or Camomile means "earth-apple", because of the applelike scent of the plant. It…

An illustration of a inflorescence of a asteraceae. The family Asteraceae or Compositae (known as the aster, daisy, or sunflower family) is the largest family of flowering plants, in terms of number of species.

Inflorescence of Asteraceae

An illustration of a inflorescence of a asteraceae. The family Asteraceae or Compositae (known as the…

An illustration of a disk-floret of a asteraceae. The family Asteraceae or Compositae (known as the aster, daisy, or sunflower family) is the largest family of flowering plants, in terms of number of species.

Disk-floret of Asteraceae

An illustration of a disk-floret of a asteraceae. The family Asteraceae or Compositae (known as the…

An illustration of a disk-floret of a asteraceae. The family Asteraceae or Compositae (known as the aster, daisy, or sunflower family) is the largest family of flowering plants, in terms of number of species.

Disk-floret of Asteraceae

An illustration of a disk-floret of a asteraceae. The family Asteraceae or Compositae (known as the…

An illustration of a Gynaeceum of a asteraceae. The family Asteraceae or Compositae (known as the aster, daisy, or sunflower family) is the largest family of flowering plants, in terms of number of species.

Gynaeceum of Asteraceae

An illustration of a Gynaeceum of a asteraceae. The family Asteraceae or Compositae (known as the aster,…

Matricaria is a genus of flowering plants in the sunflower family (Asteraceae). Some of the species have the common name of "mayweed," but this name also refers to plants not in this genus. Most are very common in the temperate regions of Europe, Asia, and America, as well as in northern and southern Africa, and some are naturalised in Australia. M. occidentalis is native to North America; other species have been introduced there.

Mayweed

Matricaria is a genus of flowering plants in the sunflower family (Asteraceae). Some of the species…

The state banner of Kansas, the sunflower state.

Kansas

The state banner of Kansas, the sunflower state.

A species of sunflower cultivated for its tuber, which is used as a root vegetable.

Jerusalem Artichoke

A species of sunflower cultivated for its tuber, which is used as a root vegetable.

Sunflower grow to be six feet tall. The flower heads are large, varying in size and color.

Flower Head of a Sunflower

Sunflower grow to be six feet tall. The flower heads are large, varying in size and color.

Helianthus annus caifornicus plenissimus is the scientific name of the pictured sunflower. It is another form of the common sunflower.

Habit and Detached Single Flower Head of a Sunflower

Helianthus annus caifornicus plenissimus is the scientific name of the pictured sunflower. It is another…

Helianthus argophyllus is the silver leaved variety of the sunflower. The flower heads are yellow. The leaves have a soft, silky, silvery down.

Flowering Branch of a Sunflower (Helianthus Argophyllus)

Helianthus argophyllus is the silver leaved variety of the sunflower. The flower heads are yellow. The…

The helianthus decapetalus multiflorus sunflower has firm leaves and large heads. The common form has a dwarf habit with double flowers.

Flowering Branch of a Sunflower (Helianthus Decapetalus Multiflorus)

The helianthus decapetalus multiflorus sunflower has firm leaves and large heads. The common form has…

Helianthus orgyalis sunflowers have small, yellow heads. The flowers bloom in the autumn. The plant grows between six and ten feet tall.

Upper Portion of Stems and Detached Flower Head of a Sunflower (Helianthus Orgyalis)

Helianthus orgyalis sunflowers have small, yellow heads. The flowers bloom in the autumn. The plant…

Jerusalem artichoke is the tuber of a sunflower. The flower produces white, edible tubers. It can be raw or boiled and served cold with oil and vinegar.

Tuber of Jerusalem Artichoke

Jerusalem artichoke is the tuber of a sunflower. The flower produces white, edible tubers. It can be…

Drawing of three sunflowers arranged for use as top right corner decoration.

Sunflower Corner Motif, Right

Drawing of three sunflowers arranged for use as top right corner decoration.