ClipArt ETC
Inside view of a separated scale or open carpel of a Pitch Pine cone with a seed in place.

Pitch Pine Seed

Inside view of a separated scale or open carpel of a Pitch Pine cone with a seed in place.

The seed of a Pitch Pine cone.

Pitch Pine Seed Wing

The seed of a Pitch Pine cone.

The pitcher plant is remarkable for having the end of its leaf turned up so as to form a complete pitcher, filled with water, and covered with a lid. This design helps it to trap unsuspecting insects that are then digested.

Pitcher Plant

The pitcher plant is remarkable for having the end of its leaf turned up so as to form a complete pitcher,…

"Nepenthes distillatoria. 1. male; 2. female; 3. ripe fruit; 4. a section of a seed very highly magnified." -Lindley, 1853

Pitcher Plant

"Nepenthes distillatoria. 1. male; 2. female; 3. ripe fruit; 4. a section of a seed very highly magnified."…

"Heliamphora nutans. 1. the stamens and pistil; 2. the latter separate; 3. a cross section of the ovary; 4. a perpendicular section of a seed." -Lindley, 1853

Marsh Pitcher Plant

"Heliamphora nutans. 1. the stamens and pistil; 2. the latter separate; 3. a cross section of the ovary;…

Leaves of Pitcher-plant, one of them cut off, (Gray, 1858).

Pitcher-plant

Leaves of Pitcher-plant, one of them cut off, (Gray, 1858).

"Pyxidanthera barbulata. 1. corolla cut open; 2. perpendicular section of the ovary; 3. anther; 4. seed; 5. embryo." -Lindley, 1853

Flowering Pixiemoss

"Pyxidanthera barbulata. 1. corolla cut open; 2. perpendicular section of the ovary; 3. anther; 4. seed;…

Diagram of a mesophyll cell of a leaf: c, chloroplast; n, nucleus; v, vacuole; w, cell wall.

Plant Cell

Diagram of a mesophyll cell of a leaf: c, chloroplast; n, nucleus; v, vacuole; w, cell wall.

"Cell of Pellionia Daveauana, showing starch-grains. The black, crescent-shaped body on the end of each grain is the amyloplast." -Gager, 1916

Pellionia Plant Cell

"Cell of Pellionia Daveauana, showing starch-grains. The black, crescent-shaped body on the end of each…

Spike of the common Plantain or Ribwort.

Plantain

Spike of the common Plantain or Ribwort.

The Musa paradisiaca or plantain, when in fruit.

Plantain

The Musa paradisiaca or plantain, when in fruit.

An illustration of a plantain plant. The plantain is a crop in the genus Musa and is generally used for cooking, in contrast to the soft, sweet banana (which is sometimes called the dessert banana).

Plantain Flower

An illustration of a plantain plant. The plantain is a crop in the genus Musa and is generally used…

An illustration of a section of a plantain flower.

Plantain Flower (Section)

An illustration of a section of a plantain flower.

An illustration of a plantain plant flower and bract. In botany, a bract is a modified or specialized leaf. Bracts are ordinarily associated with reproductive structures (subtending flowers, inflorescence axes, or cone scales). They are ordinarily reduced in size relative to foliage leaves, or of a different color or texture from foliage leaves, or both.

Plantain Flower and Bract

An illustration of a plantain plant flower and bract. In botany, a bract is a modified or specialized…

An illustration of plantain plant fruit bursting.

Plantain Fruit

An illustration of plantain plant fruit bursting.

"Plantago lanceolata. 1. flower and bract; 2. pistil; 3. ovary cut across; 4. seed; 5. section of it." -Lindley, 1853

Ribwort Plantain

"Plantago lanceolata. 1. flower and bract; 2. pistil; 3. ovary cut across; 4. seed; 5. section of it."…

"Fortunaea chinensis; 1. a female cone; 2. ripe nut; 3. perpendicular section of do.; 4. female flower; 5. male flower." -Lindley, 1853

Platycarya

"Fortunaea chinensis; 1. a female cone; 2. ripe nut; 3. perpendicular section of do.; 4. female flower;…

This shows a plicate leaf.

Plicate Leaf

This shows a plicate leaf.

"Prunus domestica. 1. a section of its drupe; 2. a section of the endocarp, showing the position of the seed." -Lindley, 1853

Plum

"Prunus domestica. 1. a section of its drupe; 2. a section of the endocarp, showing the position of…

Pods generally split lengthwise when ripe and dry.

Pod

Pods generally split lengthwise when ripe and dry.

A capsule is a pod that splits into three pieces.

Pod

A capsule is a pod that splits into three pieces.

A capsule is a pod that splits into three pieces.

Pod

A capsule is a pod that splits into three pieces.

This is a young pod, partly covered by a loose calyx, (Gray, 1858).

Pod

This is a young pod, partly covered by a loose calyx, (Gray, 1858).

This is a ripe checkerberry, cut through the middle lengthwise, (Gray, 1858).

Pod

This is a ripe checkerberry, cut through the middle lengthwise, (Gray, 1858).

A separate pod of the Wild Columbine, (Gray, 1858).

Pod

A separate pod of the Wild Columbine, (Gray, 1858).

Pod of St. John's Wort, cut in half,(Gray, 1858).

Pod

Pod of St. John's Wort, cut in half,(Gray, 1858).

The pod of the Hibiscus surrounded by the calyx and involucel.

Pod

The pod of the Hibiscus surrounded by the calyx and involucel.

The pod of the Hibiscus splitting into five valves.

Pod

The pod of the Hibiscus splitting into five valves.

The pod of Common Flax cut across.

Pod

The pod of Common Flax cut across.

Pods generally split lengthwise when ripe and dry.

Pod

Pods generally split lengthwise when ripe and dry.

The five pods of the Wild Columbine opening, (Gray, 1858).

Pod

The five pods of the Wild Columbine opening, (Gray, 1858).

Pod of Celandine opening, (Gray, 1858).

Pod

Pod of Celandine opening, (Gray, 1858).

Ripe pod of Claytonia or Spring Beauty, cut across, and splitting into three valves (Gray, 1858).

Claytonia Pod

Ripe pod of Claytonia or Spring Beauty, cut across, and splitting into three valves (Gray, 1858).

Simple pistil of Podophyllum, cut across, showing ovules borne on placenta.

Podophyllum

Simple pistil of Podophyllum, cut across, showing ovules borne on placenta.

These are the fruit of the Poison Sumac, Rhus vernix (Keeler, 1915).

Poison Sumac Fruit

These are the fruit of the Poison Sumac, Rhus vernix (Keeler, 1915).

"Phytolacca decandra. 1. its flower; 2. its stamens and pistil; 3. a section of a seed." -Lindley, 1853

Poke Root

"Phytolacca decandra. 1. its flower; 2. its stamens and pistil; 3. a section of a seed." -Lindley, 1853

"Seguiera floribunda. 1. a flower; 2. a perpendicular section of an ovary; 3. samaras." -Lindley, 1853

Pokeweed

"Seguiera floribunda. 1. a flower; 2. a perpendicular section of an ovary; 3. samaras." -Lindley, 1853

A pollen grain.

Pollen

A pollen grain.

Magnified pollen of a Lily, smooth and oval.

Pollen

Magnified pollen of a Lily, smooth and oval.

Pollen of Echinocystis, grooved lengthwise.

Pollen

Pollen of Echinocystis, grooved lengthwise.

Pollen of Sicyos, with bristly points and smooth bands.

Pollen

Pollen of Sicyos, with bristly points and smooth bands.

Pollen of Musk Plant (Mimulus), with spiral grooves.

Pollen

Pollen of Musk Plant (Mimulus), with spiral grooves.

Pollen of Succory, twelve-sided and dotted.

Pollen

Pollen of Succory, twelve-sided and dotted.

A X-section of a pome.

Pome

A X-section of a pome.

A pome is a well-known fruit of the apple, pear and quince. It comes from a compound pistil with a coherent calyx-tube.

Pome

A pome is a well-known fruit of the apple, pear and quince. It comes from a compound pistil with a coherent…

This is a classification of a type of fruit.

Pome (Apple)

This is a classification of a type of fruit.

"Punica granatum; 2. perpendicular section of the ovary; 3. cross section of it near the base; 4. near the base." -Lindley, 1853

Pomegranate

"Punica granatum; 2. perpendicular section of the ovary; 3. cross section of it near the base; 4. near…

"Loudonia aurea. 1. a complete flower; 2. a section of the ovary." -Lindley. 1853

Common Popflower

"Loudonia aurea. 1. a complete flower; 2. a section of the ovary." -Lindley. 1853

A flower of Poppy.

Poppy

A flower of Poppy.

"Fruit of Poppy, cut transversely to show the 12 septa (S) with the seeds." -Whitney, 1911

Poppy Septa

"Fruit of Poppy, cut transversely to show the 12 septa (S) with the seeds." -Whitney, 1911

"Diagram of fruit of Poppy, cut transversely to show the 12 septa (S) with the seeds omitted." -Whitney, 1911

Poppy Septa

"Diagram of fruit of Poppy, cut transversely to show the 12 septa (S) with the seeds omitted." -Whitney,…

This illustration shows a poppy flower with its petals removed.

Poppy, Petals Removed

This illustration shows a poppy flower with its petals removed.

"Romeria refracta. 1. its stamens and pistil; 2. a cross section of the ovary of Eschscholtzia californica; 3, 4, seeds of Papaver orientale." -Lindley, 1853

Spotted Asian Poppy

"Romeria refracta. 1. its stamens and pistil; 2. a cross section of the ovary of Eschscholtzia californica;…

"Zannichellia palustris. 1. A flower; 2. a cluster of ripe ovaries; 3. an ovary opened to exhibit the ovule; 4. a vertical section of a seed, showing the folded up embryo." -Lindley, 1853

Potamogetonaceae

"Zannichellia palustris. 1. A flower; 2. a cluster of ripe ovaries; 3. an ovary opened to exhibit the…

A potato.

Potato

A potato.

Wheel-shaped and five-lobed corolla of Potato.

Potato

Wheel-shaped and five-lobed corolla of Potato.

An illustration of the leaf of a potato plant.

Potato Plant Leaf

An illustration of the leaf of a potato plant.

An illustration of a inflorescence of a potato plant.

Inflorescence of Potato Plant

An illustration of a inflorescence of a potato plant.

An illustration of the tubers on underground branches of a potato plant.

Tubers of a Potato Plant

An illustration of the tubers on underground branches of a potato plant.

Section of a Potato-seed, showing the embryo coiled in the albumen.

Potato-seed

Section of a Potato-seed, showing the embryo coiled in the albumen.