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A type of flower.

Madonna Lily

A type of flower.

"Maerua angolensis. 1. a ripe fruit; 2. a seed; 3. a section of it." -Lindley, 1853

Maerua

"Maerua angolensis. 1. a ripe fruit; 2. a seed; 3. a section of it." -Lindley, 1853

This is "a flowering branch of a cucumber-tree, Magnolia acuminata", (Keeler, 1915).

Magnolia

This is "a flowering branch of a cucumber-tree, Magnolia acuminata", (Keeler, 1915).

This is the cucumber-tree, Magnolia acuminata fruit discharging its seed", (Keeler, 1915).

Magnolia Seed

This is the cucumber-tree, Magnolia acuminata fruit discharging its seed", (Keeler, 1915).

Terminal winter bud of Magnolia Umbrella.

Magnolia Umbrella

Terminal winter bud of Magnolia Umbrella.

Three early stages in the growth of ovule of a Magnolia, showing the forming outer and inner coats, which, even in the later figure have not yet completely enclosed the nucleus.

Ovule of a Magnolia

Three early stages in the growth of ovule of a Magnolia, showing the forming outer and inner coats,…

"Magnolia glauca. 1. the pistil; 2. a section of the seed." -Lindley, 1853

Sweetbay Magnolia

"Magnolia glauca. 1. the pistil; 2. a section of the seed." -Lindley, 1853

Agave americana is also known as the Century Plant or Maguey and is used as an ornamental plant.

Maguey

Agave americana is also known as the Century Plant or Maguey and is used as an ornamental plant.

Of the Mahogany family, "Ekebergia Senegalensis. 1. a flower; 2. the calyx and staminal tube; 3. a transverse section of the ovary; 4. a ripe fruit; 5. a vertical section of the latter." -Lindley, 1853

Ekebergia

Of the Mahogany family, "Ekebergia Senegalensis. 1. a flower; 2. the calyx and staminal tube; 3. a transverse…

"Swietenia mahagoni. 1. a flower; 2. a cup of stamens spread open, and the pistil; 3. fruit; 4. a seed; 5. a section of it to show the crosscut embryo." -Lindley, 1853

West Indian Mahogany

"Swietenia mahagoni. 1. a flower; 2. a cup of stamens spread open, and the pistil; 3. fruit; 4. a seed;…

The Common Male Fern (Dryopteris filix-mas) is a species of male fern in the Dryopteridaceae family.

Common Male Fern

The Common Male Fern (Dryopteris filix-mas) is a species of male fern in the Dryopteridaceae family.

Flower of a Mallow, with calyx and corolla cut away; showing monadelphous stamens.

Mallow

Flower of a Mallow, with calyx and corolla cut away; showing monadelphous stamens.

"Byttneria celtoides. 1. an expanded flower; 2. cup of stamens; 3. abortive stamen; 4. pistil." -Lindley, 1853

Mallow

"Byttneria celtoides. 1. an expanded flower; 2. cup of stamens; 3. abortive stamen; 4. pistil." -Lindley,…

The image shows a fascicle (bundle or cluster) of flowers of a mallow plant (Malvaceae).

Fascicle of Mallow Flowers

The image shows a fascicle (bundle or cluster) of flowers of a mallow plant (Malvaceae).

"Melochia graminifolia. 1. flower; 2. stamens and pistil; 3. ripe fruit; 4. a coccus; 5. section of a seed." -Lindley, 1853

Malvale

"Melochia graminifolia. 1. flower; 2. stamens and pistil; 3. ripe fruit; 4. a coccus; 5. section of…

"1. Kandelia Rheedii; 2. its flower spread open; 3. a perpendicular section of its ovary; 4. the germinating seed; 5. the anther of Rhisophora macrorhiza." -Lindley. 1853

Mangrove

"1. Kandelia Rheedii; 2. its flower spread open; 3. a perpendicular section of its ovary; 4. the germinating…

"Arctostaphylos pungens. 1. a stamen; 2. a cross section of an ovary." -Lindley, 1853

Pointleaf Manzanita

"Arctostaphylos pungens. 1. a stamen; 2. a cross section of an ovary." -Lindley, 1853

Much magnified small portion of young root of a seedling Maple.

Maple

Much magnified small portion of young root of a seedling Maple.

Lower end of Maple root magnified, the root seen just as root-hairs are beginning to for a little behind the tip.

End of Maple Root

Lower end of Maple root magnified, the root seen just as root-hairs are beginning to for a little behind…

Seedling Maple, of the natural size; the root well supplied with root hairs, here large enough to be seen by the naked eye.

Maple Seedling

Seedling Maple, of the natural size; the root well supplied with root hairs, here large enough to be…

Here is a representation of two seeds of the maple, with their wings. They always grow in this way, in pairs.

Maple Seeds

Here is a representation of two seeds of the maple, with their wings. They always grow in this way,…

Magnified view of surface of a bit of young Maple wood from which the bark has been torn away, showing the wood-cells and the bark-ends of medullary rays.

Bit of Young Maple Wood

Magnified view of surface of a bit of young Maple wood from which the bark has been torn away, showing…

"1. Acer circinatum. 2. flower of A. campestre; 3. its samara; 4. the same, with the seed laid bare; 5. the embryo unfolded." -Lindley, 1853

Vine Maple

"1. Acer circinatum. 2. flower of A. campestre; 3. its samara; 4. the same, with the seed laid bare;…

"Haemodorum spicatum. 1. A flower spread open; 2. a cross section of the ovary; 3. an anther." -Lindley, 1853

Mardja

"Haemodorum spicatum. 1. A flower spread open; 2. a cross section of the ovary; 3. an anther." -Lindley,…

"Hippuris vulgaris. 1. a complete flower; 2. a section of the pistil, showing the position of the ovule; 3. a section of the ripe fruit and seed." -Lindley. 1853

Common Mare's Tail

"Hippuris vulgaris. 1. a complete flower; 2. a section of the pistil, showing the position of the ovule;…

"Marignia obtusifolia. 1. a flower; 2. the same divided vertically; 3. a fruit; 4. a section of the same." -Lindley, 1853

Marignia

"Marignia obtusifolia. 1. a flower; 2. the same divided vertically; 3. a fruit; 4. a section of the…

Follicle of Marsh Marigold (Caltha palustris)

Marigold

Follicle of Marsh Marigold (Caltha palustris)

Similar section of a sterile conceptacle, containing slender antheridia.

Marine Algae of New England

Similar section of a sterile conceptacle, containing slender antheridia.

"Eschscholtzia maritima of florists." — Baily, 1898

Escholzia Maritima

"Eschscholtzia maritima of florists." — Baily, 1898

A type of marigold flower.

Marsh Marigold

A type of marigold flower.

Pod of a Marsh St. John's-wort, with septicidal dehiscence.

Marsh St. John's-wort

Pod of a Marsh St. John's-wort, with septicidal dehiscence.

Plant of Marsilia quadrifoliata, at the right a pair of sporo-carps.

Marsilia quadrifoliata

Plant of Marsilia quadrifoliata, at the right a pair of sporo-carps.

Matico or Piper aduncum is a pepper crop also known as Artanthe elongata.

Matico

Matico or Piper aduncum is a pepper crop also known as Artanthe elongata.

"Mayaca vandellii; 1. a flower; 2. a cross section of its ovary; 3. a seed vessel; 4. two seeds, one of which is cut perpendicularly in order to show the embryo." -Lindley, 1853

Mayaca

"Mayaca vandellii; 1. a flower; 2. a cross section of its ovary; 3. a seed vessel; 4. two seeds, one…

Akene of Mayweed (no pappus)

Mayweed

Akene of Mayweed (no pappus)

"1. Spiraea ulmaria; 4. section of the flower of a Spiraea." -Lindley, 1853

Meadowsweet

"1. Spiraea ulmaria; 4. section of the flower of a Spiraea." -Lindley, 1853

"1. Medinilla macrocarpa; 2. stamens of M. radicans; 3. perpendicular section of its ovary; 4. a section of its seed; 5. embryo." -Lindley. 1853

Medinilla

"1. Medinilla macrocarpa; 2. stamens of M. radicans; 3. perpendicular section of its ovary; 4. a section…

Medinilla Sieboldiana is a flowering plant of the Melastomataceae family.

Siebold's Medinilla

Medinilla Sieboldiana is a flowering plant of the Melastomataceae family.

"Longitudinal radial section through the wood of a branch of maple one year old: P, pith; B, bark." -Century, 1889 In botany, Medullary rays refer to a characteristic found in woods. In this context the term refers to radial sheets or ribbons extending vertically through the tree across and perpendicular to the growth rings. Also called pith rays or wood rays, these formations of primarily parenchyma cells allow the radial transmission of sap.

Medullary Rays of Maple

"Longitudinal radial section through the wood of a branch of maple one year old: P, pith; B, bark."…

Separate stamen of a melon, enlarged showing the long and contorted anther.

Melon

Separate stamen of a melon, enlarged showing the long and contorted anther.

"Daphne Mezereum. 1. a flower cut open; 2. a vertical section of an ovary; 3. the fruit." -Lindley, 1853

Mezereon

"Daphne Mezereum. 1. a flower cut open; 2. a vertical section of an ovary; 3. the fruit." -Lindley,…

"Micromelum monophyllum. 1. a flower; 2. the pistil when the calyx is rolled back; 3. a cross section of an ovary; 4. longitudinal section of a seed." -Lindley, 1853

Micromelum

"Micromelum monophyllum. 1. a flower; 2. the pistil when the calyx is rolled back; 3. a cross section…

"Simple microtome for clamping to table. P, P, plate glass ways for the section knife; S, milled-head for clamping the object; M, micrometer milled-head for turning the screw that raises the object as the sections are cur; C, milled-head for clamping the microtome to the table." -Stevens, 1916

Microtome

"Simple microtome for clamping to table. P, P, plate glass ways for the section knife; S, milled-head…

"Showing the manner of holding the knife blade on the glass ways, and, by the arrow, the direction of sliding he knife while cutting the sections." -Stevens, 1916

Microtome and Razor

"Showing the manner of holding the knife blade on the glass ways, and, by the arrow, the direction of…

"A sliding microtome of simple construction, adapted to cutting all kinds of sections." -Stevens, 1916

Sliding Microtome

"A sliding microtome of simple construction, adapted to cutting all kinds of sections." -Stevens, 1916

"Miersia chilensis; 2. its flower; 3. the interior coloured petaloid bracts; 4. a perpendicular section of the perianth." -Lindley, 1853

Miersia chilensis

"Miersia chilensis; 2. its flower; 3. the interior coloured petaloid bracts; 4. a perpendicular section…

"Reseda mediterranea. 1. a flower seen from above, much magnified; 2. a section of the same, showing the great disk on one side of the ovary, and within which the stamens arise; 3. a cross section of the ovary; 4. a seed; 5. a section of it." -Lindley, 1853

Mignonette

"Reseda mediterranea. 1. a flower seen from above, much magnified; 2. a section of the same, showing…

Seed of Milkweed, with a <em>Coma</em> or tuft of long silky hairs at one end.

Milkweed

Seed of Milkweed, with a Coma or tuft of long silky hairs at one end.

Pollen, a pair of pollinia of a Milkweed, Asclepias, attached by stalks to a gland.

Polllinia of a Milkweed

Pollen, a pair of pollinia of a Milkweed, Asclepias, attached by stalks to a gland.

"Polygala erioptera. 1. an entire flower seen from the side; 2. the same cut open to exhibit the stamens; 3. the pistil; 4. a section of a ripe seed; in the middle is the embryo; at the apex, which represents the real base, is seen a caruncula." -Lindley, 1853

Milkwort

"Polygala erioptera. 1. an entire flower seen from the side; 2. the same cut open to exhibit the stamens;…

"Flowering Branch of Glaux maritima. GLAUX. A primulaceous genus of plants, consisting of a single species, G. maritima, known as sea-milkwort or black saltwort." -Whitney, 1911

Sea Milkwort

"Flowering Branch of Glaux maritima. GLAUX. A primulaceous genus of plants, consisting of a single species,…

Leaf of Mimosa in open position.

Mimosa

Leaf of Mimosa in open position.

Leaf of Mimosa in closed position.

Mimosa

Leaf of Mimosa in closed position.

Section of the seed of Mirabilis or Four-o'clock, showing the embryo coiled round the outside of the albumen.

Mirabilis

Section of the seed of Mirabilis or Four-o'clock, showing the embryo coiled round the outside of the…

An illustration of a mistletoe plant attached to the host plant. Mistletoe is the common name for a group of hemi-parasitic plants in the order Santalales that grow attached to and within the branches of a tree or shrub.

Mistletoe Attached to Host Plant

An illustration of a mistletoe plant attached to the host plant. Mistletoe is the common name for a…

An illustration of the flower of the mistletoe plant. Mistletoe is the common name for a group of hemi-parasitic plants in the order Santalales that grow attached to and within the branches of a tree or shrub.

Mistletoe Flower

An illustration of the flower of the mistletoe plant. Mistletoe is the common name for a group of hemi-parasitic…

An illustration of one staminate flower in section, magnified twelve times. Mistletoe is the common name for a group of hemi-parasitic plants in the order Santalales that grow attached to and within the branches of a tree or shrub.

Mistletoe Staminate

An illustration of one staminate flower in section, magnified twelve times. Mistletoe is the common…

An illustration of one pistillate flower of mistletoe. Mistletoe is the common name for a group of hemi-parasitic plants in the order Santalales that grow attached to and within the branches of a tree or shrub.

One Pistillate Flower of Mistletoe

An illustration of one pistillate flower of mistletoe. Mistletoe is the common name for a group of hemi-parasitic…

An illustration of pistillate flowers of mistletoe. Mistletoe is the common name for a group of hemi-parasitic plants in the order Santalales that grow attached to and within the branches of a tree or shrub.

Pistillate Flowers of Mistletoe

An illustration of pistillate flowers of mistletoe. Mistletoe is the common name for a group of hemi-parasitic…

"Notelaea ovata. 1. flower; 2. fruit." -Lindley, 1853

Mock Olive

"Notelaea ovata. 1. flower; 2. fruit." -Lindley, 1853