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 edulis are passion flower and passion fruit. Edulis is edible. The fruit is a livid purple color when ripe. The pulp is orange colored and has a taste resembling the flavor of an orange.

Fruit and Leaves of Passiflora Edulis

The common names of passiflora edulis are passion flower and passion fruit. Edulis is edible. The fruit…

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…

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…

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.

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…

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. 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…

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…

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…

The flower clusters of pennisetum longistylum grow in spikes from four to six inches long. The leaves are narrow and gracefully arching. The grass is about one foot tall.

Pennisetum Longistylum

The flower clusters of pennisetum longistylum grow in spikes from four to six inches long. The leaves…

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…

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 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…

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…

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.

Pictured is a single perianth as seen in anemone sylvestris.

Single Perianth

Pictured is a single perianth as seen in anemone sylvestris.

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…

Holy Ghost Flower, or Dove Flower, is the common name of peristeria elata. The flowers are sweet scented and about one and a half inches across. The flowers spikes reach three feet or more in height.

Holy Ghost Flower

Holy Ghost Flower, or Dove Flower, is the common name of peristeria elata. The flowers are sweet scented…

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…

In the single varieties of petunia there is variety in coloring. Some are beautifully veined, striped, or marked in various ways.

Flower of Single Garden Petunia

In the single varieties of petunia there is variety in coloring. Some are beautifully veined, striped,…

Double varieties of petunias are full and beautifully fimbriated.

Flower of Double Garden Petunia

Double varieties of petunias are full and beautifully fimbriated.

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 flowers are white with a strong, orange-like scent. The flowers appear in May.

Flowering Branchlet of Philadelphus Coronarius

The common name of philadelphus coronarius is common mock orange or syringa. The flowers are white with…

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…

Philadelphus gordonianus is a variety of mock orange. The flowers are white and scentless. The plant grows ten feet tall.

Flowering Branch of Philadelphus Gordonianus

Philadelphus gordonianus is a variety of mock orange. The flowers are white and scentless. The plant…

The flowers of philodendron selloum are deep green, bordered with white and white on the inside. The leaves are large, green, and long stalked.

Philodendron Selloum

The flowers of philodendron selloum are deep green, bordered with white and white on the inside. The…

The flowers of philodendron speciosum are purplish green on the outside and purplish red on the inside. The leaves are green and have a triangular shape.

Philodendron Speciosum

The flowers of philodendron speciosum are purplish green on the outside and purplish red on the inside.…

The flowers of phlox drummondii are red, varying to rose, purple or white, with a darker eye. The flowers appear in August.

Inflorescence of Phlox Drummondii

The flowers of phlox drummondii are red, varying to rose, purple or white, with a darker eye. The flowers…

Phlox paniculata flowers are pink-purple, varying to white. The flowers bloom in August. The plant is erect, smooth, rough, or hairy.

Inflorescence of Phlox Paniculata

Phlox paniculata flowers are pink-purple, varying to white. The flowers bloom in August. The plant is…

Phlox reptans flowers are purple or violet and bloom in spring. It is a neat and dwarf growing species.

Phlox Reptans

Phlox reptans flowers are purple or violet and bloom in spring. It is a neat and dwarf growing species.

The common names of phlox subulata are ground or moss pink. The flowers are pinkish with a dark center. The flowers bloom in April.

Flowering Branch of Phlox Subulata

The common names of phlox subulata are ground or moss pink. The flowers are pinkish with a dark center.…

Phlox subulata nivalis is a white variety of moss pink.

Flowering Branches of Phlox Subulata Nivalis

Phlox subulata nivalis is a white variety of moss pink.

Phlox subulata frondosa is a very vigorous variety with lilac-rose flowers.

Habit and Detached Flower and Leaves of Phlox Subulata Frondosa

Phlox subulata frondosa is a very vigorous variety with lilac-rose flowers.

Small flax lily is the common name of phormium cookianum. The flowers are yellow with greenish outer segments. The flowers are about one inch long. The flowers bloom in summer.

Small Flax Lily

Small flax lily is the common name of phormium cookianum. The flowers are yellow with greenish outer…

Common New Zealand flax is the common name of phormium tenax. The flowers are yellow or red and two inches long. The flowers bloom in August.

Common New Zealand Flax

Common New Zealand flax is the common name of phormium tenax. The flowers are yellow or red and two…

The common names of photinia japonica are Japan Medlar, Japan Quince, and Loquat. The flowers are white and bloom in autumn. The fruit is the size of a small apple.

Fruiting Branchlet of Photinia Japonica

The common names of photinia japonica are Japan Medlar, Japan Quince, and Loquat. The flowers are white…

Japan Medlar, Japan Quince, and Loquat are the common names of photinia japonica. The fruit is the size of a small apple and a pale, orange-red color. The plant grows between ten and twenty feet tall.

Inflorescence and Single Fruit of Photinia Japonica

Japan Medlar, Japan Quince, and Loquat are the common names of photinia japonica. The fruit is the size…

The common name of phygelius capensis is cape figwort. The flowers are scarlet and bloom in summer. The plant grows three feet tall.

Phygelius Capensis

The common name of phygelius capensis is cape figwort. The flowers are scarlet and bloom in summer.…

Phyllanthus angustifolius flowers are red and bloom in July. The stem is two feet high.

Branch of Phyllanthus Angustifolius

Phyllanthus angustifolius flowers are red and bloom in July. The stem is two feet high.

Phyllanthus chantrieri flowers are brick-red with pale yellow hairs. The flowers bloom in summer. Branches form a right angle with the stem.

Phyllanthus Chantrieri

Phyllanthus chantrieri flowers are brick-red with pale yellow hairs. The flowers bloom in summer. Branches…

The male flowers of phyllanthus salviaefolius are small and greenish. The female flowers are larger and tinted with red. The branches are much spreading.

Phyllanthus Salviaefolius

The male flowers of phyllanthus salviaefolius are small and greenish. The female flowers are larger…

The longitudinal section of a flower of phyllocactus shpws the botanical characteristics. A represents the calyx tube, B shows the calyx lobes, C represents the petaloid calyx lobe, D shows the petals, E shows the style, and F represents the ovary.

Longitudinal Section of Flower of Phyllocactus

The longitudinal section of a flower of phyllocactus shpws the botanical characteristics. A represents…

Phyllocactus ackermanni flowers are rich crimson with shining petals. The flowers are six to eight inches in diameter.

Branch of Phyllocactus Ackermanni

Phyllocactus ackermanni flowers are rich crimson with shining petals. The flowers are six to eight inches…

The flowers of phyllocactus anguliger are three to five inches in diameter. The petals are white and the sepals are orange or yellowish. The stems are deeply angled.

Phyllocactus Anguliger

The flowers of phyllocactus anguliger are three to five inches in diameter. The petals are white and…

The petals of phyllocactus biformis flowers are narrow and about two or three inches long. The flowers are a pale, rosy pink color. The plant branches freely and is three feet tall.

Phyllocactus Biformis

The petals of phyllocactus biformis flowers are narrow and about two or three inches long. The flowers…