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Longitudinal section of a peach, showing flesh, stone, and seed.

Peach

Longitudinal section of a peach, showing flesh, stone, and seed.

"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,…

"Germinating peas, growing in water, one deprived of its cotyledons." -Bergen, 1896

Germinating Peas

"Germinating peas, growing in water, one deprived of its cotyledons." -Bergen, 1896

"Soaked Peas in stoppered bottle, ready for exhaustion of air." -Bergen, 1896

Soaked Peas

"Soaked Peas in stoppered bottle, ready for exhaustion of air." -Bergen, 1896

"11. seed of Penaea mucronata; 12. same with half the testa removed." -Lindley, 1853

Penaea Seeds

"11. seed of Penaea mucronata; 12. same with half the testa removed." -Lindley, 1853

"Celastrus paniculatus. 1. a flower; 2. a perpendicular section of the ovary; 3. a cross section of the ovary; 4. a vertical section of a seed; 5. a cross section of it." -Lindley, 1853

Peng

"Celastrus paniculatus. 1. a flower; 2. a perpendicular section of the ovary; 3. a cross section of…

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…

Section of a seed of a Peony, showing a very small embryo in the albumen, near one end.

Peony

Section of a seed of a Peony, showing a very small embryo in the albumen, near one end.

"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

A pepo is a sort of berry with a harder rind.

Pepo

A pepo is a sort of berry with a harder rind.

"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…

Rootstocks, or creeping subterranean branches of the Peppermint.

Peppermint

Rootstocks, or creeping subterranean branches of the Peppermint.

Stamens of a flower that surround the rim of a cup or tube that surrounds the ovary, but is not attached to it.

Perigynous Stamens

Stamens of a flower that surround the rim of a cup or tube that surrounds the ovary, but is not attached…

"Vinca minor. 1. corolla opened; 2. style and stigma; 3. perpendicular section of the double ovary; 4. section of a seed." -Lindley, 1853

lesser Periwinkle

"Vinca minor. 1. corolla opened; 2. style and stigma; 3. perpendicular section of the double ovary;…

Section through a petal of buttercup (Ranunculus), showing nectar gland (n). Note bundle of conducting tissues.

Petal

Section through a petal of buttercup (Ranunculus), showing nectar gland (n). Note bundle of conducting…

This is a Buttercup petal, with glands.

Petal of Buttercup, With Glands

This is a Buttercup petal, with glands.

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

Barberry Petal

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

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.

Plagiochila is a large, common, and widespread genus of liverworts in order Jungermanniales. It is a member of the family Plagiochilaceae within that order. There may be anywhere from 500 to 1300 species, most of them from the tropics; the exact number is still under revision. The genus also has a wide distribution in temperate and arctic areas.

Phagiochila

Plagiochila is a large, common, and widespread genus of liverworts in order Jungermanniales. It is a…

Plant of Phaseolus grown in darkness.

Phaseolus

Plant of Phaseolus grown in darkness.

"Philesia buxifolia; 2. stigma of Lapageria rosea (Copihue); 3. its ovary cut across; 4. its ovule." -Lindley, 1853

Philesia and Copihue

"Philesia buxifolia; 2. stigma of Lapageria rosea (Copihue); 3. its ovary cut across; 4. its ovule."…

Corolla of a Phlox, with salver-shaped corolla.

Phlox

Corolla of a Phlox, with salver-shaped corolla.

"Pysostemon lanceolatum. 1. a flower of the natural size; 2. the calyx, stamens, and ovary; 3. the ripe fruit, with one valve separating; 4, a seed; 5. the same cut vertically, to show the incurved embryo." -Lindley, 1853

Physostemon lanceolatum

"Pysostemon lanceolatum. 1. a flower of the natural size; 2. the calyx, stamens, and ovary; 3. the ripe…

Utricle of the common Pigweed (Chenopodium album).

Common Pigweed

Utricle of the common Pigweed (Chenopodium album).

A type of flower.

Pimpernel

A type of flower.

"Brunonia sericea. 1. a complete flower; 2. the pistil; 3. a ripe fruit; 4. embryo." -Lindley, 1853

Blue Pincushion

"Brunonia sericea. 1. a complete flower; 2. the pistil; 3. a ripe fruit; 4. embryo." -Lindley, 1853

As it were of three grains or cells united; the lateral empty and light.

Pine Pollen

As it were of three grains or cells united; the lateral empty and light.

"Cone of Pinus muricata, showing the difference between the outer and inner sides of the same strobilius when the inner side is pressed against a branch. 1. A pair of leaves; 2. the end of the leaf magnified; 3, a seed, natural size." -Lindley, 1853

Bishop Pine

"Cone of Pinus muricata, showing the difference between the outer and inner sides of the same strobilius…

Pinus sylvestris: the needles and cone of the Scots Pine tree.

Scots Pine

Pinus sylvestris: the needles and cone of the Scots Pine tree.

Section of a Pine-seed, showing its polycotyledonous embryo in the centre of the albumen; moderately magnified.

Section of Pine-seed

Section of a Pine-seed, showing its polycotyledonous embryo in the centre of the albumen; moderately…

Seedling of pine-seed, showing the freshly expanded six cotyledons in a whorl, and the plumule just appearing.

Seedling of Pine-seed

Seedling of pine-seed, showing the freshly expanded six cotyledons in a whorl, and the plumule just…

Magnified bit of a pine-shaving, taken parallel with the silver grain.

Pine-shaving

Magnified bit of a pine-shaving, taken parallel with the silver grain.

The fimbriate petals of the flower of the Clove Pink (Dianthus caryophyllus), from the Caryophyllaceae family of pinks or carnations.

Clove Pink

The fimbriate petals of the flower of the Clove Pink (Dianthus caryophyllus), from the Caryophyllaceae…

From left to right: Pinnate with odd leaflet, Pinnate with a tendril in place, Pinnate with even pairs.

Pinnate Leaves

From left to right: Pinnate with odd leaflet, Pinnate with a tendril in place, Pinnate with even pairs.

From left to right: pinnately lobed, pinnately cleft, pinnately parted, pinnately divided.

Pinnately Leaves

From left to right: pinnately lobed, pinnately cleft, pinnately parted, pinnately divided.

Eriocaulon setaceum is a plant species in the Eriocaulaceae family of pipeworts.

Pipewort

Eriocaulon setaceum is a plant species in the Eriocaulaceae family of pipeworts.

The upper side of an open pistil or scale from a forming Larch-cone.

Pistil

The upper side of an open pistil or scale from a forming Larch-cone.

The upper side of an open pistil or scale from a forming Larch-cone. The ovules becoming seeds.

Pistil

The upper side of an open pistil or scale from a forming Larch-cone. The ovules becoming seeds.

Pistils united in St. John's Wort, (Gray, 1858).

Pistil

Pistils united in St. John's Wort, (Gray, 1858).

Pistil of Sand-Spurrey cut through lengthwise and magnified, (Gray, 1858).

Pistil

Pistil of Sand-Spurrey cut through lengthwise and magnified, (Gray, 1858).

Pistil and flower of Catchfly cut through lengthwise, (Gray, 1858).

Pistil

Pistil and flower of Catchfly cut through lengthwise, (Gray, 1858).

the compound pistil of Mallow magnified.

Pistil

the compound pistil of Mallow magnified.

The pistil of the American Linden.

Pistil

The pistil of the American Linden.

The pistil of the American Linden, cut in two.

Pistil

The pistil of the American Linden, cut in two.

Pistil of Garden Gooseberry.

Pistil

Pistil of Garden Gooseberry.

A pistil; with ovary, <em>a</em>, half cut away, to show the contained ovules; <em>b</em>, style; <em>c</em>, stigma.

Pistil

A pistil; with ovary, a, half cut away, to show the contained ovules; b, style; c,…

Pistil and stamens of a shepherd's purse.

Pistil and stamens of shepherd's purse

Pistil and stamens of a shepherd's purse.

Compound 3-carpellary pistil of common St. John's-wort, cut across: the three styles separate.

Pistil of common St. John's-wort

Compound 3-carpellary pistil of common St. John's-wort, cut across: the three styles separate.

Pistil of a Sandwort, with vertical and transverse section of the ovary: free central placenta.

Pistil of Sandwort

Pistil of a Sandwort, with vertical and transverse section of the ovary: free central placenta.

Two simple carpals or pistil-leaves, united at the base only, cut across both above and below.

Pistil of Saxifrage

Two simple carpals or pistil-leaves, united at the base only, cut across both above and below.

The same of shrubby St. John's-wort; the three styles as well as ovaries here united into one.

Pistil of shrubby St. John's-wort

The same of shrubby St. John's-wort; the three styles as well as ovaries here united into one.

Compound 3-carpellary pistil of Tradescantia or Spiderwort; the three stigmas as well as styles and ovary completely coalescent into one.

Pistil of Spiderwort

Compound 3-carpellary pistil of Tradescantia or Spiderwort; the three stigmas as well as styles and…

Pistil of Anemone, cut in half, showing the ovary and ovule,(Gray, 1858).

Anemone Pistil

Pistil of Anemone, cut in half, showing the ovary and ovule,(Gray, 1858).

Pistil of the flower of the Morning Glory.

Morning Glory Pistil

Pistil of the flower of the Morning Glory.

Pistil of the flower of the Morning Glory.

Morning Glory Pistil

Pistil of the flower of the Morning Glory.

Eleven-celled pistil White Water-Lily, (Gray, 1858).

Water-lily Pistil

Eleven-celled pistil White Water-Lily, (Gray, 1858).

Pistillate flower of Moonseed.

Pistillate Moonseed

Pistillate flower of Moonseed.

Piece of a branch of Pitch Pine, with three leaves in a fascicle or bundle, in the axial of a thin scale, which answers to a primary leaf. The bundle is surrounded at the base by a short sheath, formed of the delicate scales of the auxiliary bud.

Pitch Pine

Piece of a branch of Pitch Pine, with three leaves in a fascicle or bundle, in the axial of a thin scale,…

Cone of a common Pitch Pine.

Pitch Pine

Cone of a common Pitch Pine.

This shows the cluster of three leaves of the Pitch Pine, Pinus rigida, (Keeler, 1915).

Pitch Pine Needles

This shows the cluster of three leaves of the Pitch Pine, Pinus rigida, (Keeler, 1915).