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A longitudinal section of an acorn, showing two cotyledons and the embryo.

Longitudinal section of an acorn

A longitudinal section of an acorn, showing two cotyledons and the embryo.

"Young seedling of windsor bean. c, cotyledon; r, root; s, stem." -Bergen, 1896

Windsor Bean Seedling

"Young seedling of windsor bean. c, cotyledon; r, root; s, stem." -Bergen, 1896

Cross-section of a kernel of corn. Food is stored in the cotyledon and in the endosperm which surrounds the embryo.

Kernel of Corn

Cross-section of a kernel of corn. Food is stored in the cotyledon and in the endosperm which surrounds…

"Embryo germinating: a running into the ground to become a root; b running up to form a stem; c the tube which supplies nutriment from the cotyledons until both roots and leaves are ready to work." -Newman, 1850

Cotyledon Germinating

"Embryo germinating: a running into the ground to become a root; b running up to form a stem; c the…

Cotyledon secunda is stemless and the leaves grow in a rosette. The flowers grow in a one sided, recurved spike. The flowers are reddish yellow and bloom June to August.

Cotyledon Secunda

Cotyledon secunda is stemless and the leaves grow in a rosette. The flowers grow in a one sided, recurved…

"Diagram to show the essential parts of a "flowering" plant. t.r., tap-root; cot. seed-leaf (cotyledon); i, internode; a.l, leaf-axil; n, node; a.b, axillary buud; r, receptacle of floral organs; ca, calyx; per, perianth; co, corolla; st, stamens (androecium); pi, pistil (gynoecium)." -Gager, 1916

Flower Parts

"Diagram to show the essential parts of a "flowering" plant. t.r., tap-root; cot. seed-leaf (cotyledon);…

"1. Leaf of Ouvirandra fenestralis; 2. a flower cut open; 3. section of a ripe carpel of O. Bernieriana; 4, 5. embryo in different positions: the thicker part is cotyledon, the smaller the plumule." -Lindley, 1853

Lattice Leaf Plant

"1. Leaf of Ouvirandra fenestralis; 2. a flower cut open; 3. section of a ripe carpel of O. Bernieriana;…

This illustration shows stages in the germination of the gametospore of Lepidium, sectional view: A, micropylar end of embryo sac, showing the enlarging gametospore provided with cell wall and attached to wall of sac. B, later growth-s, suspensor; e, embryo cell; en, endosperm cells. C, pro-embryo after first division of embryo cell. D, further divisions of embryo cell, showing formation of an epidermis and a central stem region. E, later growth, two growing regions, the cotyledons, appearing on the sides of the stem. F, plant or embryo, consisting of two cotyledons, c; stem, st, which terminates in the root, r; the endosperm cells, en, are ebing absorbed by the enlarging embryo; s, suspensor.

Lepidium

This illustration shows stages in the germination of the gametospore of Lepidium, sectional view: A,…

"Litsaea Baueri. 1. a male flower; 2. a female; 3. a stamen, with a gland at the base; 4. an anther, with the recurved valves; 5. a cluster of fruit; 6. a cotyledon seen from within, with the plumule adhering to the inner face." -Lindley, 1853

Litsea

"Litsaea Baueri. 1. a male flower; 2. a female; 3. a stamen, with a gland at the base; 4. an anther,…

An illustration of the cotyledon of a maple. A cotyledon is a significant part of the embryo within the seed of a plant. Upon germination, the cotyledon may become the embryonic first leaves of a seedling.

Cotyledon of a Maple

An illustration of the cotyledon of a maple. A cotyledon is a significant part of the embryo within…

A newly germinated seed of the Red Maple, seed leaves, and the roots.

Red Maple Seedling

A newly germinated seed of the Red Maple, seed leaves, and the roots.

A more advanced seedling of the Red Maple,.

Red Maple Seedling

A more advanced seedling of the Red Maple,.

A newly germinated seed, showing the cotyledons or seed leaves, and the roots.

Seed

A newly germinated seed, showing the cotyledons or seed leaves, and the roots.

A grain of corn.

Seed

A grain of corn.

Cross-section of a bean seed, showing the cotyledon, plumule, and caulicle.

Bean seed

Cross-section of a bean seed, showing the cotyledon, plumule, and caulicle.

A newly germinated seed, seed leaves, and the roots.

Seedling

A newly germinated seed, seed leaves, and the roots.

A newly germinated seed, seed leaves, and the roots.

Seedling

A newly germinated seed, seed leaves, and the roots.

A newly germinated seed, seed leaves, and the roots.

Seedling

A newly germinated seed, seed leaves, and the roots.

A seedling of the bean.

Seedling

A seedling of the bean.

A more advanced seedling of the bean.

Seedling

A more advanced seedling of the bean.

A more advanced seedling of the cherry.

Seedling

A more advanced seedling of the cherry.

A seedling of the oak with a section of acorn.

Seedling

A seedling of the oak with a section of acorn.

A seedling of the pea plant .

Seedling

A seedling of the pea plant .

A seedling from a grain of corn.

Seedling

A seedling from a grain of corn.

A more advanced seedling from a grain of corn.

Seedling

A more advanced seedling from a grain of corn.

"Lengthwise section of a squash seed. c, hypocotyl; cot, cotyledon; e, endosperm; h, hilum; p, plumule; t, testa." -Bergen, 1896

Squash Seed

"Lengthwise section of a squash seed. c, hypocotyl; cot, cotyledon; e, endosperm; h, hilum; p, plumule;…