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In this acorn the nut is surrounded by a scaly cup.

Acorn

In this acorn the nut is surrounded by a scaly cup.

Acorn

Acorn

Acorn

An acorn from a dicotyledon.

Acorn

An acorn from a dicotyledon.

An illustration of an acorn.

Acorn

An illustration of an acorn.

A couple of ants retreating from their flooding acorn home.

Acorn Home

A couple of ants retreating from their flooding acorn home.

This shows the acorn of Bear Oak, Quercus ilicifolia, (Keeler, 1915).

Bear Oak Acorn

This shows the acorn of Bear Oak, Quercus ilicifolia, (Keeler, 1915).

This shows the acorn of Black Jack Oak, Quercus marilandica, (Keeler, 1915).

Black Jack Oak Acorn

This shows the acorn of Black Jack Oak, Quercus marilandica, (Keeler, 1915).

This shows the acorn of Chinquapin Oak, Quercus prinoides, (Keeler, 1915).

Chinquapin Oak Acorn

This shows the acorn of Chinquapin Oak, Quercus prinoides, (Keeler, 1915).

A cross-section of an acorn.

Cross-section of an acorn

A cross-section of an acorn.

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.

This shows the acorn of Pin Oak, Quercus palustris, (Keeler, 1915).

Pin Oak Acorn

This shows the acorn of Pin Oak, Quercus palustris, (Keeler, 1915).

This shows the acorn of Red Oak, Quercus rubra, (Keeler, 1915).

Red Oak Acorn

This shows the acorn of Red Oak, Quercus rubra, (Keeler, 1915).

This shows the acorn of Scarlet Oak, Quercus coccinea, (Keeler, 1915).

Scarlet Oak Acorn

This shows the acorn of Scarlet Oak, Quercus coccinea, (Keeler, 1915).

This shows the acorn of Shingle Oak, Quercus imbricaria, (Keeler, 1915).

Shingle Oak Acorn

This shows the acorn of Shingle Oak, Quercus imbricaria, (Keeler, 1915).

This shows acorns of Spanish Oak, Quercus digitata, (Keeler, 1915).

Spanish Oak Acorn

This shows acorns of Spanish Oak, Quercus digitata, (Keeler, 1915).

This shows the acorn of Swamp White Oak, Quercus platanoides, (Keeler, 1915).

Swamp Oak Acorn

This shows the acorn of Swamp White Oak, Quercus platanoides, (Keeler, 1915).

This shows the acorn of Willow Oak, Quercus phellos, (Keeler, 1915).

Willow Oak Acorn

This shows the acorn of Willow Oak, Quercus phellos, (Keeler, 1915).

"a, larva within acron; b, acorn infested with the larva; c, head and thoracic segments of larva; d, one of the abdomincal segments of view; f, moth; g, basal joint antenna in the male moth."-Whitney, 1902

Acorn-moth

"a, larva within acron; b, acorn infested with the larva; c, head and thoracic segments of larva; d,…

"Roman Ovolo Molding, with Pearl Beading. The ornamentation had to correspond with the massive character of Roman architecture, and consequently became more massive and more copious itself."

Roman Astragal

"Roman Ovolo Molding, with Pearl Beading. The ornamentation had to correspond with the massive character…

"Ornamented Roman Astragal. The ornamentation had to correspond with the massive character of Roman architecture, and consequently became more massive and more copious itself."

Roman Astragal

"Ornamented Roman Astragal. The ornamentation had to correspond with the massive character of Roman…

Two bugs outside of their acorn home arguing about their gas bill.

Bugville

Two bugs outside of their acorn home arguing about their gas bill.

A branch of the camphor tree, Cinnamomum camphora.

Camphor Tree Branch

A branch of the camphor tree, Cinnamomum camphora.

"Ornamented Cornice with Pearl Beading. The ornamentation had to correspond with the massive character of Roman architecture, and consequently became more massive and more copious itself."

Roman Cornice

"Ornamented Cornice with Pearl Beading. The ornamentation had to correspond with the massive character…

"Richly Ornamented Roman Ovolo. The ornamentation had to correspond with the massive character of Roman architecture, and consequently became more massive and more copious itself."

Roman Cornice

"Richly Ornamented Roman Ovolo. The ornamentation had to correspond with the massive character of Roman…

"Fragment of an Ancient Roman Frieze. The ornamentation had to correspond with the massive character of Roman architecture, and consequently became more massive and more copious itself. This is an example of enrichment of which vegetable objects were the model."

Ancient Roman Frieze

"Fragment of an Ancient Roman Frieze. The ornamentation had to correspond with the massive character…

"A philosopher, seating himself under an oak tree, and viewing its massiveness, could not understand why so large a tree should produce such small fruit. 'There,' said he, 'is the pumpkin, growing on a slender vine; how much better it would be, if that vine bore acorns, and the great tree the pumpkins; then there would be some harmony and fitness in nature.' As he was meditating on this subject, and examining some ancient theories on the works of creation, an acorn dropped on his head and broke up the train of his reflections. 'How foolish and short-sighted I am, to question the wisdom of Providence,' thought the philosopher, 'if the acorn had been a pumpkin, my head would have been broken.'"—Barber, 1857

Man Thinks Himself Wise, till God Shows Him His Folly

"A philosopher, seating himself under an oak tree, and viewing its massiveness, could not understand…

Oaks are easily recognized by their characteristic leaves and especially by their peculiar fruit, the well-known acorn.

Oak

Oaks are easily recognized by their characteristic leaves and especially by their peculiar fruit, the…

Oak trees grow in many parts of the country.

Oak

Oak trees grow in many parts of the country.

"Acorn and cupule of Quercus Skinneri, natural size; 2. cross section of the acorn, showing the lobed embryo." -Lindley, 1853

Acorn

"Acorn and cupule of Quercus Skinneri, natural size; 2. cross section of the acorn, showing the lobed…

This shows a sprouting acorn (Keeler, 1915).

Acorn

This shows a sprouting acorn (Keeler, 1915).

Also known as Quercus cerris. A greenish-white tree with a dark gray bark. The flower produced is a cylindrical cluster of yellow flowers, which are usually wind-pollinated. The fruit is a large acorn, which is bicoloured with an orange bottom half grading to a green-brown tip.

Turkey Oak

Also known as Quercus cerris. A greenish-white tree with a dark gray bark. The flower produced is a…

A seedling of the oak with a section of acorn.

Seedling

A seedling of the oak with a section of acorn.

Also known as Quercus cerris. A branchlet of a turkey oak with an acorn.

Turkey Oak with an Acorn

Also known as Quercus cerris. A branchlet of a turkey oak with an acorn.