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The Lady's Slipper is the common name of cypripedium calceolus. The flower has two fertile stamens.

Cypripedium Calceolus

The Lady's Slipper is the common name of cypripedium calceolus. The flower has two fertile stamens.

Cypripedium spectabile is an orchid. It is also a variety of the lady's slipper.

Single Flower of Cypripedium Spectabile

Cypripedium spectabile is an orchid. It is also a variety of the lady's slipper.

"Cytinus Hypocistis. 1. A flower; 2. a head of anthers; 3. a transverse section of the ovary." -Lindley, 1853

Cytinus

"Cytinus Hypocistis. 1. A flower; 2. a head of anthers; 3. a transverse section of the ovary." -Lindley,…

Cytisus purpurens. 1, flower.

Cytisus purpurens

Cytisus purpurens. 1, flower.

"Daffodil is the popular name of a plant which is one of the earliest ornaments of our gardens, being favorite objects of cultivation."—(Charles Leonard-Stuart, 1911)

Daffodil

"Daffodil is the popular name of a plant which is one of the earliest ornaments of our gardens, being…

"Pancratium maritimum. 1. a flower cut open, and showing that there is a bifid tooth, forming a coronet or cup, between each stamen; 2. a transverse section of the ovary." -Lindley, 1853

Sea Daffodil

"Pancratium maritimum. 1. a flower cut open, and showing that there is a bifid tooth, forming a coronet…

"Daffodils modeled from tissue-paper." -Beard, 1906

Tissue paper daffodil

"Daffodils modeled from tissue-paper." -Beard, 1906

An illustration of a single dahlia flower. Dahlia is a genus of bushy, tuberous, perennial plants native to Mexico, Central America, and Colombia. There at least 36 species of Dahlia. Dahlia hybrids are commonly grown as garden plants. The Aztecs gathered and cultivated the dahlia for food, ceremony, as well as decorative purposes, and the long woody stem of one variety was used for small pipes

Dahlia

An illustration of a single dahlia flower. Dahlia is a genus of bushy, tuberous, perennial plants native…

An illustration of a double variety dahlia flower. Dahlia is a genus of bushy, tuberous, perennial plants native to Mexico, Central America, and Colombia. There at least 36 species of Dahlia. Dahlia hybrids are commonly grown as garden plants. The Aztecs gathered and cultivated the dahlia for food, ceremony, as well as decorative purposes, and the long woody stem of one variety was used for small pipes

Dahlia

An illustration of a double variety dahlia flower. Dahlia is a genus of bushy, tuberous, perennial plants…

Grafting is a method of asexual plant propagation widely used in agriculture and horticulture where the tissues of one plant are encouraged to fuse with those of another. Pictured here is the root-grafting of a dahlia.

Root-Grafting of Dahlia

Grafting is a method of asexual plant propagation widely used in agriculture and horticulture where…

A variety of dahlias of the Composite family.

Dahlias

A variety of dahlias of the Composite family.

A bunch of daisies.

Daisies

A bunch of daisies.

The daisy is a very common flower with a yellow center and white petals.

Daisy

The daisy is a very common flower with a yellow center and white petals.

An illustration of a daisy.

Daisy

An illustration of a daisy.

Typical form of Corolla. 9, Tubular (daisy, disc floret).

Daisy

Typical form of Corolla. 9, Tubular (daisy, disc floret).

Typical form of Corolla. 12, Ligulate (daisy, ray floret).

Daisy Floret

Typical form of Corolla. 12, Ligulate (daisy, ray floret).

An illustration of three common Daisies growing in the wild. One Daisy is partially closed and the other two are in full bloom.

Common Daisy

An illustration of three common Daisies growing in the wild. One Daisy is partially closed and the other…

One daisy.

One Daisy

One daisy.

Chrysanthemum Leucanthemum is a synonym for Leucanthemum vulgare, or the oxeye daisy, a flowering plant of the Asteraceae family.

Oxeye Daisy

Chrysanthemum Leucanthemum is a synonym for Leucanthemum vulgare, or the oxeye daisy, a flowering plant…

A plant with a hollow stock and a yellow flower on top.

Dandelion

A plant with a hollow stock and a yellow flower on top.

"The dandelion; a so-called stemless plant." -Bergen, 1896

Dandelion

"The dandelion; a so-called stemless plant." -Bergen, 1896

The seed, flower, and leaf of a dandelion.

Dandelion

The seed, flower, and leaf of a dandelion.

Taraxacum is a large genus of flowering plants in the family Asteraceae. They are native to Europe, North America and Asia and two species, T. officinale and T. erythrospermum, are found as weeds worldwide. The common name Dandelion is given to members of the genus and like other members of the Asteraceae family, they have very small flowers collected together into a composite flower head. Each single flower in a head is called a floret. Many Taraxacum species produce seeds asexually by apomixis, where the seeds are produced without pollination, resulting in offspring that are genetically identical to the parent plant.

Dandelion

Taraxacum is a large genus of flowering plants in the family Asteraceae. They are native to Europe,…

A plant consisting of very small flowers collected together in a composite flower head.

Dandelion

A plant consisting of very small flowers collected together in a composite flower head.

The floret of Taraxacum Dens Leonis, a species of dandelion.

Dandelion Floret

The floret of Taraxacum Dens Leonis, a species of dandelion.

Also known as taraxacum officinale. Part A of the image shows the common form, grown in plains region at low altitude. Part B of the image is the alpine form.

Common Dandelion

Also known as taraxacum officinale. Part A of the image shows the common form, grown in plains region…

The sections of two species of Darwinia flowers.

Darwinia

The sections of two species of Darwinia flowers.

Day lily is the common name of hemerocallis. The fulva variety has large flowers, about four inches wide. There are only a few flowers in each cluster. The flowers bloom in the summer.

Day Lily (Hemerocallis Fulva)

Day lily is the common name of hemerocallis. The fulva variety has large flowers, about four inches…

Dead-Nettle (Lamium), with labiate.

Dead-Nettle

Dead-Nettle (Lamium), with labiate.

Decorative footer with vines

Decorative Footer

Decorative footer with vines

A slightly-toothed fern with fronds ranging between 1 foot and 2 feet in length. It is a long and slender plant, commonly found in tropical America.

Pteris Denticulata

A slightly-toothed fern with fronds ranging between 1 foot and 2 feet in length. It is a long and slender…

"Deutzia crenata. 1. a flower with the petals removed; 2. a fruit; 3. a portion of the same, showing the placentation; 4. section of a seed very highly magnified." -Lindley, 1853

Deutzia

"Deutzia crenata. 1. a flower with the petals removed; 2. a fruit; 3. a portion of the same, showing…

Devil's Apples is the common name of mandragora vernalis. The flowers are white or bluish. Pictured is the entire plant in flower, the young fruit, the ovary, and the stamen.

Devil's Apples

Devil's Apples is the common name of mandragora vernalis. The flowers are white or bluish. Pictured…

Dianthus is a genus of about 300 species of flowering plants in the family Caryophyllaceae, native mainly to Europe and Asia, with a few species extending south to north Africa, and one species (D. repens) in arctic North America. The species are mostly perennial herbs, a few are annual or biennial, and some are low subshrubs with woody basal stems. The leaves are opposite, simple, mostly linear and often strongly glaucous grey-green to blue-green. The flowers have five petals, typically with a frilled or pinked margin, and are (in almost all species) pale to dark pink. One species, D. knappii, has yellow flowers with a purple center.

Dianthus

Dianthus is a genus of about 300 species of flowering plants in the family Caryophyllaceae, native mainly…

Pictured are flowers of the orders diapensiaceae, primulaceae, and plumbaginaceae. The flowers of these orders that are illustrated include (1) diapensia, (2) primula, (3) armeria, (4) statice, and (5) plumbago.

Orders of Diapensiaceae, Primulaceae, and Plumbaginaceae

Pictured are flowers of the orders diapensiaceae, primulaceae, and plumbaginaceae. The flowers of these…

"Morphology of a typical dicotyledonous plant. A, leaf, pinnately-netted veined; B, portion of stem, showing concentric layers of wood; C, ground-plan of flower (the parts in 5's); D, perspective of flower; E, longitudinal section of seed, showing dicotyledonous embryo." -Gager, 1916

Dicotyledonous Morphology

"Morphology of a typical dicotyledonous plant. A, leaf, pinnately-netted veined; B, portion of stem,…

Dill (Anethum graveolens) is a short-lived perennial herb. It is the sole species of the genus Anethum, though classified by some botanists in a related genus as Peucedanum graveolens.

Dill

Dill (Anethum graveolens) is a short-lived perennial herb. It is the sole species of the genus Anethum,…

"Diplopteris paralias; 1. a flower-bud, showing the double glands of the calyx; 2. an expanded flower; 3. the carpels; 4. ripe fruit of Ryssopteris timorensis." -Lindley, 1853

Diplopterys

"Diplopteris paralias; 1. a flower-bud, showing the double glands of the calyx; 2. an expanded flower;…

Pictured are flowers of the orders dipsacaceae, cucurbitaceae, and campanulaceae. The flowers illustrated are (1) dipsacus, (2) scabiosa, (3) cucurbita, (4) campanula, and (5) lobelia.

Orders of Dispsacaceae, Cucurbitaceae, and Campanulaceae

Pictured are flowers of the orders dipsacaceae, cucurbitaceae, and campanulaceae. The flowers illustrated…

A flowery divider

Floral Divider

A flowery divider

A floral divider.

Floral Divider

A floral divider.

A floral divider.

Floral Divider

A floral divider.

An ornate divider.

Ornate Divider

An ornate divider.

"Polygonaceae is mainly a north temperate order. A few genera are tropical which has 125 species restricted to tropical and sub—tropical America. Polygonum has a very wide distribution to the mountains of tropical Africa and South Africa, through the highlands of tropical Asia to Australia, and in America as far south as Chile. Most of the genera have a limited distribution. Of the three which are native in the British Isles." —Encyclopaedia Britannica Company, 1910

Flowers and Leaves of Common Dock

"Polygonaceae is mainly a north temperate order. A few genera are tropical which has 125 species restricted…

"Dogbane. a, end of branch, with leaves and flowers; b, a flower cut open; c, fruit." — Chambers' Encyclopedia, 1875

Dogbane

"Dogbane. a, end of branch, with leaves and flowers; b, a flower cut open; c, fruit." — Chambers'…

"Benthamia japonica. 1. a flower; 2. a perpendicular section of the pistil; 3. a head of fruit; 4. a section of a seed." -Lindley, 1853

Dogwood

"Benthamia japonica. 1. a flower; 2. a perpendicular section of the pistil; 3. a head of fruit; 4. a…

The English Dogwood (Philadelphus coronarius) is a deciduous shrub, here showing its epigynous stamens and petals growing on top of the ovary.

English Dogwood

The English Dogwood (Philadelphus coronarius) is a deciduous shrub, here showing its epigynous stamens…

Double varieties of petunias are full and beautifully fimbriated.

Flower of Double Garden Petunia

Double varieties of petunias are full and beautifully fimbriated.

Pictured is a double perianth as seen in the flower of abutilon insigne. A double perianth has an outer circle of green sepals and an inner circle of colored petals.

Double Perianth

Pictured is a double perianth as seen in the flower of abutilon insigne. A double perianth has an outer…

Double zonal pelargonium, commonly know a jewel, has small pure scarlet flowers. These flowers resemble the blossom of a double hawthorn. The trusses are small and neat.

Truss and Single Flower of Double Zonal Pelargonium

Double zonal pelargonium, commonly know a jewel, has small pure scarlet flowers. These flowers resemble…

Gloxinia flowers originally were all drooping.

Drooping Flowered Gloxinia

Gloxinia flowers originally were all drooping.

Common duckweed, <em>Lemna</em>. The entire plant is reduced to a leaf-like expansion which bears a long slender root and small flowers; forms green floating scum on ponds and stagnant pools.

Duckweed

Common duckweed, Lemna. The entire plant is reduced to a leaf-like expansion which bears a…

A common greenhouse perennial having flowers like roses

Streptocarpus Dunnii

A common greenhouse perennial having flowers like roses

"Monotropa Hypopithys. 2. a flower; 3. a pistil; 4. the same divided perpendicularly; 5. a seed; 6. seed of Pterospora andromedea; 7. section of it." -Lindley, 1853

Dutchman's Pipe

"Monotropa Hypopithys. 2. a flower; 3. a pistil; 4. the same divided perpendicularly; 5. a seed; 6.…

"Aristolochia galeata. 1. fruit of an Aristolochia; 2. cross section of it; 3. half its seed." -Lindley, 1853

Mottled Dutchman's Pipe

"Aristolochia galeata. 1. fruit of an Aristolochia; 2. cross section of it; 3. half its seed." -Lindley,…

A floral middle divider.

Floral Divider

A floral middle divider.

"The Foficulina includes the Earwig, <em>Forficula</em>, which appears to live principally upon vegetable substances. As this trie often attack the petals of flowers, they are regarded as enemies by the gardener." &mdash; Goodrich, 1859

Earwigs

"The Foficulina includes the Earwig, Forficula, which appears to live principally upon vegetable…

Also known as Juglans nigra. A species of flowering tree in the hickory tree, native to eastern North America.

Branch of Eastern Black Walnut Tree

Also known as Juglans nigra. A species of flowering tree in the hickory tree, native to eastern North…

Edelweiss (Leontopodium alpinum) is a European mountain flower of the Asteraceae or daisy family.

Edelweiss

Edelweiss (Leontopodium alpinum) is a European mountain flower of the Asteraceae or daisy family.

Edelweiss is the common name of leontopodium alpinum. The flowers heads are enveloped in woolly bracts. The flowers bloom in June and July.

Flower Head of Edelweiss

Edelweiss is the common name of leontopodium alpinum. The flowers heads are enveloped in woolly bracts.…