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

Acorn

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

Also known as Castanea pumila. The branch of an Allegheny Chinkapin tree, native to the eastern United States.

Branch of Allegheny Chinkapin

Also known as Castanea pumila. The branch of an Allegheny Chinkapin tree, native to the eastern United…

The branch, blossom, and fruit of the almond tree.

Almond

The branch, blossom, and fruit of the almond tree.

Also known as Castanea dentata. The branch of an American Chestnut tree, native to eastern North America.

Branch of American Chestnut

Also known as Castanea dentata. The branch of an American Chestnut tree, native to eastern North America.

"A genus of plants of the natural order Leguminosae, sub-order Papilionaceae, natives of the warm parts of America, of which, until recently, the only known species was the A. hypogaea, sometimes called the underground kidney-bean, and more frequently the ground-nut. It also receives the names of earth-nut, American earth-nut, and mandubi." — Chambers' Encyclopedia, 1875

Arachis

"A genus of plants of the natural order Leguminosae, sub-order Papilionaceae, natives of the warm parts…

An illustration of the hexagonal bolt head showing measurements. The measurement of diameter, D, is used to calculate the dimensions. The diameter of the head and the nut, H, is 1 ½D ₌ ⅛, and the distance of T is half the diameter.

U.S. Standard Hexagonal Bolt Head

An illustration of the hexagonal bolt head showing measurements. The measurement of diameter, D, is…

A screw used with nuts, driven into tapped holes.

Machine Bolt

A screw used with nuts, driven into tapped holes.

Also known as Juglans californica. A species of walnut shrub endemic to California.

Branch of California Black Walnut

Also known as Juglans californica. A species of walnut shrub endemic to California.

"Cashew Nut. Cashew, a tree common in the West Indies. Its fruit is called the cashew nut. The nut is small, kidney-shaped, ash-gray, and contains an acrid juice." -Vaughan, 1906

Cashew Branch

"Cashew Nut. Cashew, a tree common in the West Indies. Its fruit is called the cashew nut. The nut is…

An illustration of various parts of the cashew tree. "1, Branch, bearing flowers and fruit. The fruit stales are enlarged in pear like for bearing the nut (the true fruit) at their apex; 2, Flower expanded; Stamen and pistil, with the calyx; 4, Stamen separated; 5, Nut constituting the fruit; 6, Nut opened longitudinally; 7, Seed seprated from the nut; 8, Cotyledons opened to show the radicle a, and the plumule." (Britannica, 1910)

Cashew Tree

An illustration of various parts of the cashew tree. "1, Branch, bearing flowers and fruit. The fruit…

Embryo of Cherry,(Gray, 1858).

Cherry Embryo

Embryo of Cherry,(Gray, 1858).

Also known as Quercus prinus. The branch of a Chestnut Oak tree, native to the eastern United States.

Branch of Chestnut Oak

Also known as Quercus prinus. The branch of a Chestnut Oak tree, native to the eastern United States.

Japanese chestnut is the common name of castanea crenata. The nuts are large and glossy. There are usually three nuts to a bur, but sometimes there are five or seven.

Japanese Chestnuts

Japanese chestnut is the common name of castanea crenata. The nuts are large and glossy. There are usually…

Common or tree chinquapin is the common name of castanea pumila. Illustrated are the nut and bur.

Chinquapin

Common or tree chinquapin is the common name of castanea pumila. Illustrated are the nut and bur.

Cobnuts (Corylus tubulosa). 1, nut; 2, 3, sections of nut.

Cobnuts

Cobnuts (Corylus tubulosa). 1, nut; 2, 3, sections of nut.

"Symphytum officinale; 2. a diagram of its flower; 3. its pistil; 4. the calyx opened, with two of the nuts remaining; 5. a vertical section of a nut." -Lindley, 1853

Comfrey

"Symphytum officinale; 2. a diagram of its flower; 3. its pistil; 4. the calyx opened, with two of the…

Each scale of the pine cone is a whole pistillate flower. (Gray, 1858).

Cone

Each scale of the pine cone is a whole pistillate flower. (Gray, 1858).

A representation of the square threaded nut and screw. The left image shows the threaded screw with a continuous helix drawn. The nut is cut in half to show how the threads are drawn with respect to the screw.

Diagram of Square Thread Nut and Screw

A representation of the square threaded nut and screw. The left image shows the threaded screw with…

A representation of the square threaded nut and screw. The left image shows the threaded screw with a continuous helix drawn. The nut is cut in half to show how the threads are drawn with respect to the screw.

Diagram of Square Thread Nut and Screw

A representation of the square threaded nut and screw. The left image shows the threaded screw with…

Also known as Juglans nigra. A species of flowering tree in the hickory tree, native to eastern North America.

Branch of Eastern Black Walnut Tree

Also known as Juglans nigra. A species of flowering tree in the hickory tree, native to eastern North…

Embryo of Morning Glory,(Gray, 1858).

Embryo

Embryo of Morning Glory,(Gray, 1858).

Embryo of Morning Glory,(Gray, 1858).

Embryo

Embryo of Morning Glory,(Gray, 1858).

Filbert is a shrub that produces nuts, similar to the hazelnut. Filberts can be distinguished by the extension beyond the point of the enclosed nut.

Fruiting Branchlet of Filbert

Filbert is a shrub that produces nuts, similar to the hazelnut. Filberts can be distinguished by the…

In the early spring the pollen-bearing catkins appear before the female flowers. A shows the male catkins, B shows the sessile female flowers.

Leafless Twig of Filbert

In the early spring the pollen-bearing catkins appear before the female flowers. A shows the male catkins,…

"The Nut or Glans is a one-celled fruit, with a hardened pericarp, surrounded by bracts."—Darby, 1855

Nut or Glans

"The Nut or Glans is a one-celled fruit, with a hardened pericarp, surrounded by bracts."—Darby,…

Projection of a hexagonal nut.

Projection of Hexagonal Nut

Projection of a hexagonal nut.

The branch of a Hicoria texana, a species of pecan tree.

Branch of Hicoria Texana

The branch of a Hicoria texana, a species of pecan tree.

The branch of a Hicoria villosa tree, a species of hickory.

Branch of Hicoria Villosa

The branch of a Hicoria villosa tree, a species of hickory.

Juglans regia elongata only differs from the common walnut tree in that the fruit of tree is very elongated.

Leaf and Nut of Juglans Regia Elongata

Juglans regia elongata only differs from the common walnut tree in that the fruit of tree is very elongated.

Juglans regia longirostris are distinguished by its long beaked fruits.

Fruit of Juglans Regia Longirostris

Juglans regia longirostris are distinguished by its long beaked fruits.

The branch of a Juglans rupestris, a species of walnut tree.

Branch of Juglans Rupestris

The branch of a Juglans rupestris, a species of walnut tree.

A key or key-fruit (called by Botanists a Samara) is like an akene or nut, only it is winged.

Key

A key or key-fruit (called by Botanists a Samara) is like an akene or nut, only it is winged.

A key or key-fruit (called by Botanists a Samara) is like an akene or nut, only it is winged.

Key

A key or key-fruit (called by Botanists a Samara) is like an akene or nut, only it is winged.

A key or key-fruit (called by Botanists a Samara) is like an akene or nut, only it is winged. This is a pair of keys.

Key

A key or key-fruit (called by Botanists a Samara) is like an akene or nut, only it is winged. This is…

A legume is a pod of a simple pistil, which splits into two pieces.

Legume

A legume is a pod of a simple pistil, which splits into two pieces.

Also known as Hicoria alba. The branch of a Mockernut Hickory tree, the most abundant of the hickory species.

Branch of Mockernut Hickory

Also known as Hicoria alba. The branch of a Mockernut Hickory tree, the most abundant of the hickory…

Monkey pot nut, sapucaia or sapucaya nut, and paradise nut is the common name of the fruit of lecythis. The nut is oblong and irregularly shaped, though somewhat triangular. The nut resembles a Brazil nut.

Monkey Pot Nut

Monkey pot nut, sapucaia or sapucaya nut, and paradise nut is the common name of the fruit of lecythis.…

The Mulberry contains masses of simple fruits belonging to different flowers, compacted together,(Gray, 1858).

Mulberry

The Mulberry contains masses of simple fruits belonging to different flowers, compacted together,(Gray,…

There are many types of nuts that grow on trees. They are hard to protect the growing embryo encased within.

Nut

There are many types of nuts that grow on trees. They are hard to protect the growing embryo encased…

"The nut, N, through which the screw passes, answers also for one of the beams of the press. If the screw be turned to the right, it wil advance downwards, while the nut stands still." -Comstock 1850

Nut Fixed Screw

"The nut, N, through which the screw passes, answers also for one of the beams of the press. If the…

This is the nut of the Theobroma Cacao plant (chocolate).

Cacao Nut

This is the nut of the Theobroma Cacao plant (chocolate).

The European nutcracker, known for feeding on nuts.

European Nutcracker

The European nutcracker, known for feeding on nuts.

A small, omnivorous bird, which gets its name from the hatches or hammerings it leaves on nuts.

Common European Nuthatch

A small, omnivorous bird, which gets its name from the hatches or hammerings it leaves on nuts.

Also known as Hicoria pecan. The branch of a standard pecan tree.

Branch of Pecan Tree

Also known as Hicoria pecan. The branch of a standard pecan tree.

Also known as Hicoria glabra. The branch of a Pignut Hickory tree, native to the eastern United States.

Branch of Pignut Hickory

Also known as Hicoria glabra. The branch of a Pignut Hickory tree, native to the eastern United States.

"A set of stocks, dies, and taps for cutting threads on bolts and inside of nuts."—The Federal Digest, 1921

Screw Plate

"A set of stocks, dies, and taps for cutting threads on bolts and inside of nuts."—The Federal…

Pods generally split lengthwise when ripe and dry.

Pod

Pods generally split lengthwise when ripe and dry.

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 pyxis is a pod which opens crosswise, the top separating as a lid, (Gray, 1858).

Pyxis

A pyxis is a pod which opens crosswise, the top separating as a lid, (Gray, 1858).

Illustrated are parts of the queensland nut, macadamia ternifolia: (a) nut, (b) cross section, and (c) longitudinal section.

Queensland Nut

Illustrated are parts of the queensland nut, macadamia ternifolia: (a) nut, (b) cross section, and (c)…

A Rose-hip is a kind of fruit, looking like a pear or a haw, (Gray, 1858).

Rose-hip

A Rose-hip is a kind of fruit, looking like a pear or a haw, (Gray, 1858).

A Rose-hip is a kind of fruit, looking like a pear or a haw, (Gray, 1858).

Rose-hip

A Rose-hip is a kind of fruit, looking like a pear or a haw, (Gray, 1858).

"1. Salva officinalis; 2. its corolla laid open; 3. its pistil; 4. the pistil and lower part of the flower cut open; 5. perpendicular section of a nut." -Lindley, 1853

Common Sage

"1. Salva officinalis; 2. its corolla laid open; 3. its pistil; 4. the pistil and lower part of the…

Each scale of the pine cone is a whole pistillate flower. (Gray, 1858).

Scale

Each scale of the pine cone is a whole pistillate flower. (Gray, 1858).

Each scale of the pine cone is a whole pistillate flower. (Gray, 1858).

Scale

Each scale of the pine cone is a whole pistillate flower. (Gray, 1858).

"Power is applied to the head of the screw. Each time the screw is turned into the nut, it advances the distance between two of the threads and compresses to that extent any fixed object against which it is directed." —Quackenbos 1859

Screw and Nut

"Power is applied to the head of the screw. Each time the screw is turned into the nut, it advances…