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The common name of papaver is poppy. Papaver bracteatum flowers are red and bloom in May. The plant grows four feet tall.

Papaver Bracteatum

The common name of papaver is poppy. Papaver bracteatum flowers are red and bloom in May. The plant…

Papaver murselli is a garden strain of papaver somniferum, or opium poppy. This strain has double flowers and fringed petals.

Papaver Murselli

Papaver murselli is a garden strain of papaver somniferum, or opium poppy. This strain has double flowers…

Papaver rhoeas has the common names common corn poppy and redweed. The flowers are large and scarlet. The stem are many flowered. Flore-pleno is the double flowered variety.

Papaver Rhoeas Flore-Pleno

Papaver rhoeas has the common names common corn poppy and redweed. The flowers are large and scarlet.…

Pictured are the orders of papaveraceae, fumariaceae, cruciferae, and capparidaceae. The flowers of these orders that are illustrated are (1) papaver, (2) chelidonium, (3) dicentra, (4) fumaria, and (8) cleome.

Orders of Papaveraceae, Fumariaceae, Cruciferae, and Capparidaceae

Pictured are the orders of papaveraceae, fumariaceae, cruciferae, and capparidaceae. The flowers of…

The flower of the Papaw, Asimina triloba (Keeler, 1915).

Papaw Flower

The flower of the Papaw, Asimina triloba (Keeler, 1915).

The fruit of the Papaw, Asimina triloba (Keeler, 1915).

Papaw Fruit

The fruit of the Papaw, Asimina triloba (Keeler, 1915).

Papilionaceous means having a corolla similar to that of a pea.

Papilionaceous Corolla

Papilionaceous means having a corolla similar to that of a pea.

Diagram of papilionaceous flower, with bract below; axis of inflorescence above.

Papilionaceous Flower

Diagram of papilionaceous flower, with bract below; axis of inflorescence above.

Pardanthus chinensis flowers are nearly two inches across and are orange colored spotted with purple-brown. The stem is erect and leafy.

Inflorescence and Leaf of Pardanthus Chinensis

Pardanthus chinensis flowers are nearly two inches across and are orange colored spotted with purple-brown.…

"Heracleum lanatum (Parsley family). Individual flower from the margin of an umbel." -Gager, 1916

Cow Parsnip

"Heracleum lanatum (Parsley family). Individual flower from the margin of an umbel." -Gager, 1916

A simple flower.

Flower Parts

A simple flower.

The whole stamen of a Lily

Flower Parts

The whole stamen of a Lily

A pistil cut in two.

Flower Parts

A pistil cut in two.

An assortment of passeres, one order of birds. The legs, feet, and talons are generally smaller than those of predatory birds.

Passeres

An assortment of passeres, one order of birds. The legs, feet, and talons are generally smaller than…

The common name of passiflora is passion flower. The caerulea variety has flowers that are purple at the bottom, white in the middle, and blue at the ends. Pictured is a portion of a flower bearing branch.

Passiflora Caerulea

The common name of passiflora is passion flower. The caerulea variety has flowers that are purple at…

The common names of passiflora are passion flower and passion fruit. The racemosa variety has deep red or scarlet flowers. The flowers bloom March to October.

Leaf and Inflorescence of Passiflora Racemosa

The common names of passiflora are passion flower and passion fruit. The racemosa variety has deep red…

The common names of passiflora are passion flower and passion fruit. The raddiana variety has deep red flowers with purple filaments. The flowers bloom in autumn.

Passiflora Raddiana

The common names of passiflora are passion flower and passion fruit. The raddiana variety has deep red…

A small Passion-flower, with crown of slender threads.

Passion-flower

A small Passion-flower, with crown of slender threads.

"A genus of plants almost exclusively native to the warm parts of America, and belonging to the natural order Passifloaceae; an order of exogenous plants, of which more than 200 species are known, mostly climbers, having tendrils which spring from the axils of the leaves, herbaceous or half shrubby, natives of tropical and subtropical countries, but rare in Asia and Africa." — Chambers, 1881

Passionflower

"A genus of plants almost exclusively native to the warm parts of America, and belonging to the natural…

Paulownia imperialis flowers are pale violet with dark spots inside. The flowers are one and a half to two inches long and bloom in June. The plant grows thirty feet high.

Paulownia Imperialis

Paulownia imperialis flowers are pale violet with dark spots inside. The flowers are one and a half…

The common names of pavia are buckeye and smooth-fruited horse chestnut. The californica variety has white or pale rose flowers. The flowers are very fragrant and cover the dense head of the tree. Pictured is the flowering branch, detached leaf, flower, and young fruit of pavia californica.

Pavia Californica

The common names of pavia are buckeye and smooth-fruited horse chestnut. The californica variety has…

The common name of pavia rubra is red buckeye. The flowers are bright red and bloom in May. The plant grows ten feet high.

Flowering Branch of Pavia Rubra

The common name of pavia rubra is red buckeye. The flowers are bright red and bloom in May. The plant…

Typical forms of Corolla. 18, Papillionaceou (pea).

Pea

Typical forms of Corolla. 18, Papillionaceou (pea).

Cross section of the anatomy of a pea blossom.

Pea blossom

Cross section of the anatomy of a pea blossom.

Side view of a pea blossom.

Pea blossom

Side view of a pea blossom.

Pictured is a garden variety of pea with flowers and pods in different stages of development.

Garden Variety of Pea

Pictured is a garden variety of pea with flowers and pods in different stages of development.

Diadelphous stamens of a pea-blossom.

Pea-blossom

Diadelphous stamens of a pea-blossom.

Typical forms of Corolla. 6, Perigynous (peach).

Peach

Typical forms of Corolla. 6, Perigynous (peach).

"1. branch of Pyrus communis; 2. its flower divided vertically; 3. a cross section of its fruit." -Lindley, 1853

European Pear

"1. branch of Pyrus communis; 2. its flower divided vertically; 3. a cross section of its fruit." -Lindley,…

This flowering branch of pear shows to corymbs of flowers. A large portion of flowers fall off at an early stage of growth.

Flowering Branch of Pear

This flowering branch of pear shows to corymbs of flowers. A large portion of flowers fall off at an…

Pictured are the stigmas, calyx, and nectary on flower A of the pelargonium blossom. Flower B pictures the calyx with ovary in cross section, nectary, and ovary. Flower C pictures the blossom with corolla removed. D and E are cross section of the ovary. F is the stamen.

Pelargonium Blossom and Nectary

Pictured are the stigmas, calyx, and nectary on flower A of the pelargonium blossom. Flower B pictures…

The common name of pelargonium is stork's bill. The endlicherianum variety has large, deep rose colored flowers. The two larger petals are marked with five deep purple nerves. The plant grows two feet tall.

Pelargonium Endlicherianum

The common name of pelargonium is stork's bill. The endlicherianum variety has large, deep rose colored…

Pelargonium inquinans flowers vary from intense scarlet, to rose colored, to white. The flowers bloom in July. The shrub grows two feet tall.

Flowering Branch of Pelargonium Inquinans

Pelargonium inquinans flowers vary from intense scarlet, to rose colored, to white. The flowers bloom…

The common name of pelargonium peltatum is ivy-leaved pelargonium. The flowers vary from white to red and vary in size between large and small. The plant grows two feet tall.

Pelargonium Peltatum

The common name of pelargonium peltatum is ivy-leaved pelargonium. The flowers vary from white to red…

The two upper petals of pelargonium tricolor flowers are very dark red and the three lower petals are white. Each stem is one to three flowered. The stem is shrubby, short, and branching.

Inflorescence and Leaf of Pelargonium Tricolor

The two upper petals of pelargonium tricolor flowers are very dark red and the three lower petals are…

The common name of pelargonium zonale is horseshoe geranium. Sometimes the seedlings only develop proliferous flowers.

Abnormal Proliferous Inflorescence of Pelargonium Zonale

The common name of pelargonium zonale is horseshoe geranium. Sometimes the seedlings only develop proliferous…

The common name of pelargonium zonale is horseshoe geranium. The flowers vary from all shades of red to white. The plant grows two feet tall.

Flowering Branch of Pelargonium Zonale

The common name of pelargonium zonale is horseshoe geranium. The flowers vary from all shades of red…

Pentas carnea flowers are disposed in numerous, large heads. The flowers bloom almost all year round. The plant grows one and a half feet tall.

Flowering Branch and Detached Flower of Pentas Carnea

Pentas carnea flowers are disposed in numerous, large heads. The flowers bloom almost all year round.…

The common name of pentstemon is beard tongue. The barbatus variety has light pink or light red flowers. The plant is tall and many flowered.

Pentstemon Barbatus

The common name of pentstemon is beard tongue. The barbatus variety has light pink or light red flowers.…

The flowers of pentstemon diffusus are showy and purple. The flowers bloom in September. The plant grows one and a half feet tall.

Upper Portion of Plant of Pentstemon Diffusus

The flowers of pentstemon diffusus are showy and purple. The flowers bloom in September. The plant grows…

Corolla, laid open, and stamens of Pentstemon grandiflorus, with a sterile filament in the place of the fifth stamen, and representing it.

Pentstemon Grandiflorus

Corolla, laid open, and stamens of Pentstemon grandiflorus, with a sterile filament in the place of…

The flowers of pentstemon hartwegi are scarlet or blood colored. The flowers are tubular and funnel shaped. The plant grows two feet tall.

Upper Portion of Plant of Pentstemon Hartwegi

The flowers of pentstemon hartwegi are scarlet or blood colored. The flowers are tubular and funnel…

"The ovary of Paeonia Moutan, surrounded by its broken disk." -Lindley, 1853

Peony

"The ovary of Paeonia Moutan, surrounded by its broken disk." -Lindley, 1853

Paeonia) is the only genus in the flowering plant family Paeoniaceae. They are native to Asia, southern Europe and western North America. Most are herbaceous perennial plants 0.5–1.5 metres tall, but some are woody shrubs up to 1.5–3 metres tall. They have compound, deeply lobed leaves, and large, often fragrant flowers, ranging from red to white or yellow, in late spring and early summer. In the past, the peonies were often classified in the family Ranunculaceae, alongside Hellebores and Anemones.

Peony Bud

Paeonia) is the only genus in the flowering plant family Paeoniaceae. They are native to Asia, southern…

The common name of peperomia is pepper elder. The marmorata variety has erect flowers in a tail-like catkin. The leaves are rich, bright green variegated with white. The leaves are thick and fleshy.

Habit and Detached Inflorescence of Peperomia Marmorata

The common name of peperomia is pepper elder. The marmorata variety has erect flowers in a tail-like…

"Serronia Jaborandi. 1. a cluster of flowers magnified; 2. a ripe fruit; 3. a vertical section of the same, showing the seed and position of the embyo." -Lindley, 1853

Pepper

"Serronia Jaborandi. 1. a cluster of flowers magnified; 2. a ripe fruit; 3. a vertical section of the…

The common name of peristeria is dove flower. The cerina variety has yellow flower produced in bunches on spikes. The leaves are large and dark green. Illustrated is the habit and detached flowers.

Peristeria Cerina

The common name of peristeria is dove flower. The cerina variety has yellow flower produced in bunches…

The common names of peristeria elata are Dove or Holy Ghost flower. The flowers are white with small lilac specks. The flowers appear July to September. The plant grows four feet tall.

Peristeria Elata

The common names of peristeria elata are Dove or Holy Ghost flower. The flowers are white with small…

Typical form of Corolla. 4, Hypogynous petals (buttercup).

Petal

Typical form of Corolla. 4, Hypogynous petals (buttercup).

Enlarged petal of the Barberry, (Gray, 1858).

Barberry Petal

Enlarged petal of the Barberry, (Gray, 1858).

Pictured is a petaloid perianth as seen in lilium concolor pulchellum. All parts are petaloid.

Petaloid Perianth

Pictured is a petaloid perianth as seen in lilium concolor pulchellum. All parts are petaloid.

Petunia nyctaginiflora flowers grow on alone on small stems. The flowers are large and white. The flowers appear in August.

Flowering Branch of Petunia Nyctaginiflora

Petunia nyctaginiflora flowers grow on alone on small stems. The flowers are large and white. The flowers…

Petunia violacea flowers are purplish violet and every elegant. The flowers appear in August. The stems are numerous and six to ten inches long.

Flowering Branch of Petunia Violacea

Petunia violacea flowers are purplish violet and every elegant. The flowers appear in August. The stems…

Petunia violacea or the violetflower petunia is a trumpet shaped flowering plant of the Solanaceae family.

Violetflower Petunia

Petunia violacea or the violetflower petunia is a trumpet shaped flowering plant of the Solanaceae family.

Phacelia viscida flowers are blue or purplish. The flowers appear in July. The stems are erect, about one foot high, and branched.

Habit and Detached Flowering Branchlet of Phacelia Viscida

Phacelia viscida flowers are blue or purplish. The flowers appear in July. The stems are erect, about…

Phaius grandifolius flowers are brown within and white on the outside. The flowers are three to four inches across. The flowers spikes are many flowered and two to four feet tall.

Phaius Grandifolius

Phaius grandifolius flowers are brown within and white on the outside. The flowers are three to four…

The common name of phalaenopsis is moth orchid. The amabilis variety has white flowers with yellow streaks. The flowers sometimes exceed five inches in diameter. The flower appears in autumn.

Phalaenopsis Amabilis

The common name of phalaenopsis is moth orchid. The amabilis variety has white flowers with yellow streaks.…

The common name of phalaenopsis is moth orchid. The esmeralda variety has rose colored flowers one and a half inches in diameter. The stem is one foot high.

Phalaenopsis Esmeralda

The common name of phalaenopsis is moth orchid. The esmeralda variety has rose colored flowers one and…

The common name of phalaenopsis is moth orchid. The schilleriana variety measure more than two and a half inches across. The flowers are arranged in two rows along the spike. The flowers are a rosy color.

Phalaenopsis Schilleriana

The common name of phalaenopsis is moth orchid. The schilleriana variety measure more than two and a…

The common name of philadelphus coronarius is common mock orange or syringa. The primulaeflorus variety is a double flowered variety.

Flowering Twig of Philadelphus Coronarius Primulaeflorus

The common name of philadelphus coronarius is common mock orange or syringa. The primulaeflorus variety…