Cellular Botany | ClipArt ETC

The Cellular Botany ClipArt gallery offers 293 illustrations of plant tissue at the cellular level, illustrations of cell division, and examples of individual pollen grains.

"Diagram to show the intake of carbon dioxide by the palisade cells from the intercellular spaces, the absorption by the chloroplasts of water from the cell-sap, and the passage of food from the chloroplasts into the cell-sap." -Stevens, 1916

Palisade Cell Intake

"Diagram to show the intake of carbon dioxide by the palisade cells from the intercellular spaces, the…

"Starch grains from the palisade cells of a Euphorbia leaf." -Stevens, 1916

Euphorbia Palisade Cells

"Starch grains from the palisade cells of a Euphorbia leaf." -Stevens, 1916

Pictured is the cross section of the pelargonium blossom ovary. (gh) represents the glandular hairs, (h) shows the hair, (cu) shows the cuticle, and (nc) pictures the nectar cells.

Cross Section Through Pelargonium Blossom Ovary

Pictured is the cross section of the pelargonium blossom ovary. (gh) represents the glandular hairs,…

Pictured is the vertical section of the pelargonium blossom ovary. (gh) shows the glandular hairs.

Vertical Section of Pelargonium Blossom Ovary

Pictured is the vertical section of the pelargonium blossom ovary. (gh) shows the glandular hairs.

Pellia Epiphylla

Longitudinal section of thallus at the time of fertilization

Pellia Epiphylla

Longitudinal section of almost mature sporogonium attached to the thallus

"Under the power of about 90 diameters the general character of the peridia is seen. They are densely aggregated, elongated, submerged, pale-brown, irregularly torn. The sporidia are copius...Nos. 1 and 2, indicate the general points of growth of this fungus. I find frequently on the leaf-ribs and terminal points of the leaves, and very often dispersed over the smooth parts of the leaf; sometimes, although rarely, the peridia are on the upper surface which, when matured, resembles net work. At the juncture of the leaf (see 4) the cells of the peridia are nearly round, at 5, oblong. From 3 to 4 the cellular structure is of light Vandyke brown; at 5, a pale yellow...6 represents the appearance of the peridia as see by the naked eye; 7, their general arrangements and their groupings on the leaves; 8, three cells, showing the parts of which the peridia are composed being magnified about 125 diameters." -Watts, 1874

Cellular structure of peridia

"Under the power of about 90 diameters the general character of the peridia is seen. They are densely…

A lily belonging to North America bearing orange and purple spotted flowers.

Lilium Philadelphicum

A lily belonging to North America bearing orange and purple spotted flowers.

North American lily plant bearing orange, purple, and red flowers, and can grow up to 90 centimeters.

Lilium Philadelphicum

North American lily plant bearing orange, purple, and red flowers, and can grow up to 90 centimeters.

"Diagram to show the effect of different portions of the spectrum on photosynthesis. a to F, different regions of the spectrum from red to blue. A filamentous alga lies across these, and bacteria are collecting about the alga, with greatest frequency in the red between B and C, indicating the greatest evolution of oxygen there." -Stevens, 1916

Photosynthesis

"Diagram to show the effect of different portions of the spectrum on photosynthesis. a to F, different…

This image shows the cross-section of the outer cells of a leaf of pine. S, stoma; E, epidermis; C, cuticle; ST, stereome; and M, Mesophyll Cells.

Pine Leaf

This image shows the cross-section of the outer cells of a leaf of pine. S, stoma; E, epidermis; C,…

"Diagrammatic representation of a block of pine wood highly magnified. a, Early growth; b, late growth; c, intercellular space; d, bordered pit in tangential wall of late growth; m, f and e, bordered pit in radial wall of early growth from different points of view; h, row of medullary cells for carrying food; g, row of medullary ray cells for carrying water; k, thin place in radial wall of ray cells that carry food." -Stevens, 1916

Magnified Pine

"Diagrammatic representation of a block of pine wood highly magnified. a, Early growth; b, late growth;…

Pine-shaving

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

Pictured are (1) strengthening cells, (2), internal ducts, (3) chlorophyll bearing cells, (4) bundle sheath, (5) fibro-vascular bundles, and (6) stomata of the pinus coulteri leaf.

Transverse Section of Pinus Coulteri Leaf

Pictured are (1) strengthening cells, (2), internal ducts, (3) chlorophyll bearing cells, (4) bundle…

Pinus is a genus of hardy, evergreen trees. Pictured are the strengthening cells (1), ducts surronded by strengthening cells (2), wavy chlorophylla bearing cells (3), bundle sheath (4), fibro-vascular bundle (5), stomata (6), and internal duct (7).

Transverse Section of Pinus Excelsa Leaf

Pinus is a genus of hardy, evergreen trees. Pictured are the strengthening cells (1), ducts surronded…

"Radial longitudinal section of wood of Pinus Sylvestris. a, cambium; b, c, d, e, f, wood cells; f, bordered pits in an early stage of formation, before the thickening ring has arched over the thin portion of cell'wall; t', bordered pit after the thickening mass has arched over the thin cell-wall; st, very large pits where in contact with medullary rays." — Encyclopedia Britanica, 1893

Pinus Sylvestris

"Radial longitudinal section of wood of Pinus Sylvestris. a, cambium; b, c, d, e, f, wood cells; f,…

Shown are the strengthening cells (1), ducts (2), wavy, chlorophyll bearing cells (3), bundle sheath (4), fibro-vascular bundles (5), and stomata (6).

Transverse Section of Pinus Sylvestris Leaf

Shown are the strengthening cells (1), ducts (2), wavy, chlorophyll bearing cells (3), bundle sheath…

"Different stages in the development of a bordered pit. b, The original, thin, primary wall; a, the overhanging border formed as the wall thickened. B, Thickening of the wall has continued and extended the border; the primary wall has thickened at c, forming the torus. C, the border and the torus are finished." -Stevens, 1916

Pit Development

"Different stages in the development of a bordered pit. b, The original, thin, primary wall; a, the…

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.

First stage in plant cell division: Protophase 1; "Resting cell ready to begin division." -Stevens, 1916

Plant Cell Division 1

First stage in plant cell division: Protophase 1; "Resting cell ready to begin division." -Stevens,…

Second stage in plant cell division: Protophase 2; "the nuclear reticulum is assuming the form of a thickened thread, and the cytoplasm at opposite poles is becoming thread-like to form the spindle fibers." -Stevens, 1916

Plant Cell Division 2

Second stage in plant cell division: Protophase 2; "the nuclear reticulum is assuming the form of a…

Third stage in plant cell division: Protophase 3; "The nuclear thread has divided longitudinally throughout the middle, and the spindle fibers have become more definite." -Stevens, 1916

Plant Cell Division 3

Third stage in plant cell division: Protophase 3; "The nuclear thread has divided longitudinally throughout…

Fourth stage in plant cell division: Protophase 4; "The nuclear membrane and the nucleolus have disappeared, and the nuclear thread has become segmented into chromosomes which are assembling at the equator of the cell." -Stevens, 1916

Plant Cell Division 4

Fourth stage in plant cell division: Protophase 4; "The nuclear membrane and the nucleolus have disappeared,…

Fifth stage in plant cell division: Metaphase; "The metaphase, where the longitudinal halves of the chromosomes are being drawn apart preparatory to their journey toward opposite poles." -Stevens, 1916

Plant Cell Division 5

Fifth stage in plant cell division: Metaphase; "The metaphase, where the longitudinal halves of the…

Sixth stage in plant cell division: Anaphase; "The anaphase, or movement of the chromosomes toward the poles, is about completed, connecting fibers extend from pole to pole." -Stevens, 1916

Plant Cell Division 6

Sixth stage in plant cell division: Anaphase; "The anaphase, or movement of the chromosomes toward the…

Seventh stage in plant cell division: Telophase; "Telophase where the chromosomes have begun to spin out in the form of a nuclear reticulum. The connecting fibers have begun to thicken in the equatorial plane." -Stevens, 1916

Plant Cell Division 7

Seventh stage in plant cell division: Telophase; "Telophase where the chromosomes have begun to spin…

Eighth stage in plant cell division: "The connecting fibers have spread out and come into contact with the wall of the mother cell in the equatorial plane, and the thickening of the fibers throughout this plane has made a complete cell plate within which the dividing wall will be produced." -Stevens, 1916

Plant Cell Division 8

Eighth stage in plant cell division: "The connecting fibers have spread out and come into contact with…

Ninth and final stage in plant cell division: "A nuclear membrane has been formed about each daughter nucleus, and the dividing cell-wall is complete." -Stevens, 1916

Plant Cell Division 9

Ninth and final stage in plant cell division: "A nuclear membrane has been formed about each daughter…

"Showing method of association of paternal and maternal chromosomes, at A in all vegetative nuclei, and B, C, D, their manner of separation in all vegetative nuclear divisions. Showing also manner of association of paternal and maternal chromosomes at E in early prophase of spore grandmother cells and the manner of their separation during the division of the grandmother-cell nucleus at F and G. Showing also the longitudinal division of the chromosomes in the spore mother cells in H, and their separation to form the spore nuclei in I, two of the four spores being purely paternal and two purely maternal." -Stevens, 1916

Plant Reproduction

"Showing method of association of paternal and maternal chromosomes, at A in all vegetative nuclei,…

"Diagram to show the topography and character of the tissues that evolved from the primary meristems. Cambial activity has not yet begun." -Stevens, 1916

Plant Tissues

"Diagram to show the topography and character of the tissues that evolved from the primary meristems.…

"Diagram showing additions to the primary tissues through the activity of the cambium and phellogen or cork cambium." -Stevens, 1916

Plant Tissues

"Diagram showing additions to the primary tissues through the activity of the cambium and phellogen…

Pollen usually collects on flat surfaces and leaves a yellowish color.

Pollen

Pollen usually collects on flat surfaces and leaves a yellowish color.

Pollen usually collects on flat surfaces and leaves a yellowish color.

Pollen

Pollen usually collects on flat surfaces and leaves a yellowish color.

Pollen usually collects on flat surfaces and leaves a yellowish color.

Pollen

Pollen usually collects on flat surfaces and leaves a yellowish color.

Pollen usually collects on flat surfaces and leaves a yellowish color.

Pollen

Pollen usually collects on flat surfaces and leaves a yellowish color.

Pollen usually collects on flat surfaces and leaves a yellowish color.

Pollen

Pollen usually collects on flat surfaces and leaves a yellowish color.

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.

"Modes of discharging pollen. I, by longitudinal slits in the anther-cells (amaryllis); II, by uplifted valves (barberry); III, by a pore at the top of each anther-lobe (nightshade)." -Bergen, 1896

Pollen Discharge

"Modes of discharging pollen. I, by longitudinal slits in the anther-cells (amaryllis); II, by uplifted…

"Polypodium widely distributed throughout the world, but specially developed in the tropics. The species differ greatly in size and general appearance and in the character of the frond; the sori or groups of spore—cases (sporangia) are borne on the back of the leaf, are globose and naked, that is, are not covered with a membrane (indusium)." —Encyclopaedia Britannica Company, 1910

Common Polypody Leaf with Sori

"Polypodium widely distributed throughout the world, but specially developed in the tropics. The species…

In the cross section from the ovary of the primrose flower the carpels are completely united. The carpels form a ring in the section.

Cross Section from Ovary of Primrose Flower

In the cross section from the ovary of the primrose flower the carpels are completely united. The carpels…

Prismatic crystals from the bark of Hickory.

Prismatic crystals

Prismatic crystals from the bark of Hickory.

Raphides

This is an illustration of raphides, or acicular crystals, from the stalk of the Rhubarb: three of the…

This is an illustration of raphide from an Arum, contained in a large cell.

Raphides

This is an illustration of raphide from an Arum, contained in a large cell.

A characteristic found in woods. They are the radial ribbons extending vertically through the tree across and perpendicular to the growth rings.

Medullary Rays

A characteristic found in woods. They are the radial ribbons extending vertically through the tree across…

A shows five carpels joined in a central mass. B shows a half grown ovary with a central mass bearing ovules apparently free.

Cross Sections of Ovary or Red Campion

A shows five carpels joined in a central mass. B shows a half grown ovary with a central mass bearing…

Rhaphides in a cell, from Arisaema, with small cells surrounding.

Rhaphides

Rhaphides in a cell, from Arisaema, with small cells surrounding.

This illustration shows a section of a leaf of Rhododendron. Note the compact palisade tissue which results from intense light.

Rhododendron

This illustration shows a section of a leaf of Rhododendron. Note the compact palisade tissue which…

Rhubarb-plant

Some cells from stalk of Rhubarb-plant, three containing chlorophyll; two (one torn across) with rhaphides.

This illustration shows the structure of the thallus of Ricciocarpus: A, section of the thallus, showing the apical cell, x, forming cells that by further division develop into plates of cells separated by air spaces, j. At the left the plates thus formed are seen curving over the apical cell. B, an olderp ortion of the upper part of the thallus. The air spaces, j, are greatly enlarged and the upper cells of the vertical plates have divided, arching over the air spaces but leaving small openings which permit the entrance of air for photosynthesis.

Ricciocarpus

This illustration shows the structure of the thallus of Ricciocarpus: A, section of the thallus, showing…

This illustration shows a diagram of the life history of Ricciocarpus. The upper portion of the figure represents the sexual generation and the lower portion, the asexual. The former generation begins with the formation of the spores, sp, from the mother-cell and ends with the formation of the gametes, g. The asexual generation begins with the gametospore, gm, and ends with the spore mother cells, sm.

Ricciocarpus

This illustration shows a diagram of the life history of Ricciocarpus. The upper portion of the figure…

"Splitting of partition wall between guard-cells to form the stoma (Sachs.)" — Encyclopedia Britanica, 1893

Sachs

"Splitting of partition wall between guard-cells to form the stoma (Sachs.)" — Encyclopedia Britanica,…

"Epidermis of leaf of Saxifraga Sarmentosa, showing clusters of stomata s, surrounded by large epidermal cells e. The cells among which the stomata occus are very small." — Encyclopedia Britanica, 1893

Saxifraga Sarmentosa

"Epidermis of leaf of Saxifraga Sarmentosa, showing clusters of stomata s, surrounded by large epidermal…

"Silicles. 1. Of Shepherd's-purse (Bursa Bursa-pastoris). 2. Same, opened, to show the placentae, the seeds, and the two valves. 3. Of Vernal Whitlow-grass, Draba verna. 4. Same, opened, to show the valves, the dissepiment, and the seeds." -Whitney, 1911

Silicles

"Silicles. 1. Of Shepherd's-purse (Bursa Bursa-pastoris). 2. Same, opened, to show the placentae, the…

This illustration shows a section of the leaf of skunk cabbage, Spathyema. Note the poorly developed palisade tissue and the loose arrangement of the cells of this plant which lives in moist, shaded places.

Spathyema

This illustration shows a section of the leaf of skunk cabbage, Spathyema. Note the poorly developed…

Spermatozooid, mature male germ cells, of <i>Adiantum capillus-veneris</i>. Also called spermatozoid.

Spermatozooid of the Southern Maidenhair Fern and Venus Hair Fern

Spermatozooid, mature male germ cells, of Adiantum capillus-veneris. Also called spermatozoid.

Spiral Ducts

Spiral ducts which uncoil into a single thread.