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Orange trees flower from February to March. The fruits grow to maturity is nine to eleven months.

Fruiting Branch of Mandarin Orange

Orange trees flower from February to March. The fruits grow to maturity is nine to eleven months.

Pictured is a flowering branch and detached flower head of oreopanax andreanum. The flowers are globe shaped heads. The leaves are roundish and the trunk is simple or slightly branched.

Oreopanax Andreanum

Pictured is a flowering branch and detached flower head of oreopanax andreanum. The flowers are globe…

Pictured is a tip of a flowering branch and the leaf of oreopanax epremesnilianum. There are seven to nine leaflets.

Oreopanax Epremesnillianum

Pictured is a tip of a flowering branch and the leaf of oreopanax epremesnilianum. There are seven to…

Osmanthus fragrans flowers are yellowish or almost white. The flowers bloom June to August. Pictured is the habit and a detached tip of the flowering branch.

Osmanthus Fragrans

Osmanthus fragrans flowers are yellowish or almost white. The flowers bloom June to August. Pictured…

Paeonia albiflora flowers usually have white or pink petals. The flowers are one and a half to two inches broad. The stem is two to three feet long.

Flowering Branch of Paeonia Albiflora

Paeonia albiflora flowers usually have white or pink petals. The flowers are one and a half to two inches…

Mountain peony is the common name of paeonia moutan. The flowers are large and vary in color. The plant grows three feet tall.

Flowering Branch of Mountain Peony

Mountain peony is the common name of paeonia moutan. The flowers are large and vary in color. The plant…

Mountain peony is the common name of paeonia moutan. The flowers are large and vary in color. The plant grows three feet tall.

Flowering Branch of Mountain Peony

Mountain peony is the common name of paeonia moutan. The flowers are large and vary in color. The plant…

Paeonia tenuifolia flore-pleno is a variety of peony. Flore-pleno is the double state. The tenuifolia variety has dark crimson flowers that bloom in June.

Flowering Branch of Paeonia Tenuifolia Flore-Pleno

Paeonia tenuifolia flore-pleno is a variety of peony. Flore-pleno is the double state. The tenuifolia…

The common name of paeonia is peony. The wittmanniana variety yellowish white flowers. The flowers bloom in April. Each stem has one flower head.

Flowering Branch of Paeonia Wittmanniana

The common name of paeonia is peony. The wittmanniana variety yellowish white flowers. The flowers bloom…

Paeonia albiflora flore-pleno blanc is a pure white, double herbaceous variety of peony. Pictured is a flowering branch and detached flower.

Paeonia Albiflora Flore-Pleno Blanc

Paeonia albiflora flore-pleno blanc is a pure white, double herbaceous variety of peony. Pictured is…

The common name of passiflora is passion flower. The caerulea variety has flowers that are purple at the bottom, white in the middle, and blue at the ends. Pictured is a portion of a flower bearing branch.

Passiflora Caerulea

The common name of passiflora is passion flower. The caerulea variety has flowers that are purple at…

The common names of pavia are buckeye and smooth-fruited horse chestnut. The californica variety has white or pale rose flowers. The flowers are very fragrant and cover the dense head of the tree. Pictured is the flowering branch, detached leaf, flower, and young fruit of pavia californica.

Pavia Californica

The common names of pavia are buckeye and smooth-fruited horse chestnut. The californica variety has…

The common name of pavia rubra is red buckeye. The flowers are bright red and bloom in May. The plant grows ten feet high.

Flowering Branch of Pavia Rubra

The common name of pavia rubra is red buckeye. The flowers are bright red and bloom in May. The plant…

This flowering branch of pear shows to corymbs of flowers. A large portion of flowers fall off at an early stage of growth.

Flowering Branch of Pear

This flowering branch of pear shows to corymbs of flowers. A large portion of flowers fall off at an…

Pelargonium inquinans flowers vary from intense scarlet, to rose colored, to white. The flowers bloom in July. The shrub grows two feet tall.

Flowering Branch of Pelargonium Inquinans

Pelargonium inquinans flowers vary from intense scarlet, to rose colored, to white. The flowers bloom…

The common name of pelargonium zonale is horseshoe geranium. The flowers vary from all shades of red to white. The plant grows two feet tall.

Flowering Branch of Pelargonium Zonale

The common name of pelargonium zonale is horseshoe geranium. The flowers vary from all shades of red…

Pentas carnea flowers are disposed in numerous, large heads. The flowers bloom almost all year round. The plant grows one and a half feet tall.

Flowering Branch and Detached Flower of Pentas Carnea

Pentas carnea flowers are disposed in numerous, large heads. The flowers bloom almost all year round.…

Pereski grandiflora is a synonym of pereski grandifolia. The common name of pereski is barbados gooseberry. Grandiflora has solitary, white flowers. The stem is very spiny, the larger spines being two inches long.

Branch of Pereski Grandiflora

Pereski grandiflora is a synonym of pereski grandifolia. The common name of pereski is barbados gooseberry.…

The common name of persica is peach. The davidiana variety and small fruit that are yellow when mature. The margins of the leaves are finely serrated.

Fruiting Branch, Leaf, and Stone of Persica Davidiana

The common name of persica is peach. The davidiana variety and small fruit that are yellow when mature.…

Petunia nyctaginiflora flowers grow on alone on small stems. The flowers are large and white. The flowers appear in August.

Flowering Branch of Petunia Nyctaginiflora

Petunia nyctaginiflora flowers grow on alone on small stems. The flowers are large and white. The flowers…

Petunia violacea flowers are purplish violet and every elegant. The flowers appear in August. The stems are numerous and six to ten inches long.

Flowering Branch of Petunia Violacea

Petunia violacea flowers are purplish violet and every elegant. The flowers appear in August. The stems…

Philadelphus gordonianus is a variety of mock orange. The flowers are white and scentless. The plant grows ten feet tall.

Flowering Branch of Philadelphus Gordonianus

Philadelphus gordonianus is a variety of mock orange. The flowers are white and scentless. The plant…

The leaves of philodendron verucosum are heart shaped and a delicate, satiny green. The leaves are shaded with a metallic olive color on the upper surface.

Branch and Detached Leaf of Philodendron Verucosum

The leaves of philodendron verucosum are heart shaped and a delicate, satiny green. The leaves are shaded…

The common names of phlox subulata are ground or moss pink. The flowers are pinkish with a dark center. The flowers bloom in April.

Flowering Branch of Phlox Subulata

The common names of phlox subulata are ground or moss pink. The flowers are pinkish with a dark center.…

The common names of photinia japonica are Japan Medlar, Japan Quince, and Loquat. The flowers are white and bloom in autumn. The fruit is the size of a small apple.

Fruiting Branchlet of Photinia Japonica

The common names of photinia japonica are Japan Medlar, Japan Quince, and Loquat. The flowers are white…

Phyllanthus angustifolius flowers are red and bloom in July. The stem is two feet high.

Branch of Phyllanthus Angustifolius

Phyllanthus angustifolius flowers are red and bloom in July. The stem is two feet high.

Phyllocactus ackermanni flowers are rich crimson with shining petals. The flowers are six to eight inches in diameter.

Branch of Phyllocactus Ackermanni

Phyllocactus ackermanni flowers are rich crimson with shining petals. The flowers are six to eight inches…

The common names of picea excelsa are burgundy pitch tree and Norway spruce fir. Pictured is a fruiting branch and scale with seeds in position, and the seed of the burgundy pitch tree.

Picea Excelsa

The common names of picea excelsa are burgundy pitch tree and Norway spruce fir. Pictured is a fruiting…

The leaves of pinus contorta are bright green and small, from one to two inches long. The branches are numerous and spreading.

Branch of Pinus Contorta

The leaves of pinus contorta are bright green and small, from one to two inches long. The branches are…

The common name of pinus excelsa is Bhotan pine. The branches are regularly whorled. The tree grows between sixty and one hundred fifty feet tall.

Branch of Pinus Excelsa

The common name of pinus excelsa is Bhotan pine. The branches are regularly whorled. The tree grows…

Pictured is a branch of pinus longifolia with male catkins. The branches are irregularly and thinly scattered. The bark is rough.

Branch of Pinus Longifolia

Pictured is a branch of pinus longifolia with male catkins. The branches are irregularly and thinly…

The common name of pinus pinaster is cluster pine. The leaves are dark green, stiff, broad, and stout. The leaves are between six and twelve inches long. The cones are yellowish brown and about four inches long.

Branch of Pinus Pinaster

The common name of pinus pinaster is cluster pine. The leaves are dark green, stiff, broad, and stout.…

The leaves of abutilon thompsonii are variegated with yellow. It is a variety of abutilon striatum.

Abutilon Thompsonii

The leaves of abutilon thompsonii are variegated with yellow. It is a variety of abutilon striatum.

Pictured is a characteristic branch of apricot. The fruit grows close together, appearing to be in clusters.

Branch of Apricot

Pictured is a characteristic branch of apricot. The fruit grows close together, appearing to be in clusters.

The common name of <I>Araucaria excelsa</I> is Norfolk Island Pine. The branches resemble fronds.

Araucaria Excelsa

The common name of Araucaria excelsa is Norfolk Island Pine. The branches resemble fronds.

Araucaria bidwillii</I> is rather narrow in growth. The branches are simple and the leaves grow in two rows.

Araucaria Bidwillii

Araucaria bidwillii is rather narrow in growth. The branches are simple and the leaves grow in two rows.

A food stick is simply a part of a branch with six holes in which the food mixture is place at intervals.

Food Stick

A food stick is simply a part of a branch with six holes in which the food mixture is place at intervals.

Illustrated is a flowering branch (a), the stamens (b), a longitudinal section of fruit (c), and a fruit cluster (d) of canangium odoratum. The tree bears greenish yellow fragrant flowers.

Canangium Odoratum

Illustrated is a flowering branch (a), the stamens (b), a longitudinal section of fruit (c), and a fruit…

Cucumber is the common name of cucumis sativus. The branch is prickly.

Cucumis Sativus

Cucumber is the common name of cucumis sativus. The branch is prickly.

Illustrated is a dead peach branch. The branch is dead due to the effects of the monilia funugs.

Peach Branch

Illustrated is a dead peach branch. The branch is dead due to the effects of the monilia funugs.

Illustrated is the training of a branch of a dwarf tree.

Dwarf Branch

Illustrated is the training of a branch of a dwarf tree.

Illustrated are various types of labels. (1) machine-made ready painted wood labels, (2) and (3) notched or perforated labels, (4) stake, (5) square of sheet zinc on a stake, (6) and (7) common wooden labels, (8) wired zinc label, (9) strips of zinc, (10) strip of zinc curled on a branch, (11) inexpensive, (12) (13) and (14) thin sheet copper labels, (15) zinc or copper sheet secured with copper tacks, and (16) stamped zinc.

Labels

Illustrated are various types of labels. (1) machine-made ready painted wood labels, (2) and (3) notched…

Pictured is a layer notched at the bottom. A suitable branch is bent to the ground and held in place by a forked pin.

Layer Notched at the Bottom

Pictured is a layer notched at the bottom. A suitable branch is bent to the ground and held in place…

Illustrated is a layer ringed or girdled at the bottom. A layered branch is shown with a rong of bark removed.

Layer Ringed at the Bottom

Illustrated is a layer ringed or girdled at the bottom. A layered branch is shown with a rong of bark…

Pictured is an olive branch in flower and fruit. Olives yield oil and are also prepared as a food/condiment.

Olive

Pictured is an olive branch in flower and fruit. Olives yield oil and are also prepared as a food/condiment.

(1) Large knots on a still vigorous branch of old olive tree. (2) Young olive tree planted to replace one destroyed by a knot. (3) Small knots on a much weakened branch.

Olive Tree Branches

(1) Large knots on a still vigorous branch of old olive tree. (2) Young olive tree planted to replace…

An image of a right-hand frog, or overhead switch. Switches are used when a wire needs to branch off and merge into another wire.

Right-hand Frog

An image of a right-hand frog, or overhead switch. Switches are used when a wire needs to branch off…

A left-hand frog, or overhead switch. Switches are used when trolley wires branch off with another wire, like at intersections.

Left-hand Frog

A left-hand frog, or overhead switch. Switches are used when trolley wires branch off with another wire,…

A geranium branch. Geraniums can come in a variety of different colors.

Geranium Branch

A geranium branch. Geraniums can come in a variety of different colors.

A chestnut branch. Chestnuts branches are usually green in color and have edible nuts.

Chestnut Branch

A chestnut branch. Chestnuts branches are usually green in color and have edible nuts.

Image of a tree reaching for sunlight

Tree Branch

Image of a tree reaching for sunlight

Hydrostatics is a branch of hydrodynamics that deals with the statics of fluids that are usually combined to an equilibrium and pressure of liquids. Image a is a vessel with a wooden block of the same size and image b, which has the same dimensions as image a, is filled with water and has a depth the same length as the wooden block. The pressure per square inch would be 100/10 = 10

Hydromechanics

Hydrostatics is a branch of hydrodynamics that deals with the statics of fluids that are usually combined…

Tension is the force which a gas always exerts when confined to a limited space. In the example, a partially filled football is placed in a glass jar (a receiver) from which air has been exhausted. The football immediately expands. This experiment also works with a bladder. A branch of mechanics that deals with the properties of gases is called pneumatics.

Pneumatics

Tension is the force which a gas always exerts when confined to a limited space. In the example, a partially…

A simple nerve cell, or neuron. N is the nucleus of the cell, NC is the cytoplasm, D are dendrites which are fine protoplasmic branches that create synapses that connect to another nerve cell. The neuron is connected to muscle (MU) by a nerve fiber (NF). The fiber is covered by a sheath (SH) of fat to protect it. NE is the ending of the fiber that the muscle is connected to. LB is a lateral branch of the nerve fiber.

Nerve Cell

A simple nerve cell, or neuron. N is the nucleus of the cell, NC is the cytoplasm, D are dendrites which…

Diagram of the retina, aka percipient layer of the eye. 1: inner limiting membrane, which is next to the vitreous humor in the eye cavity; 2: a branch of a divided optic nerve; 3: ganglion cell layer; 4: inner nerve-fiber layer; 5: layer of bipolar ("inner granular") cells; 6: outer layer of nerve-cells; 7: layer of visual (outer granular) cells; 8: outer limiting membrane; 9: long and thing rods and short and broad cones; 10: pigment layer; 11: tangential cells; 12: bipolar cells; 13: amacrine cell; 14: centripetal optic nerve fibers; 15: centrifugal optic nerve fibers; 16: Muller's supporting cells. I, II, III: three areas of nerve cells in the retina.

Eye Retina

Diagram of the retina, aka percipient layer of the eye. 1: inner limiting membrane, which is next to…

A leafy branch, with separate roots illustrated on the right.

Leafy Branch with Roots

A leafy branch, with separate roots illustrated on the right.

A Lemniscate is, in general, a curve generated by a point moving so that the product of its distances from two fixed points is the square of half the distance between the points. It is a particular case of the Cassinian oval and resembles a figure 8. When the line joining the two fixed points is the axis of x and the middle point of this line is the origin, the Cartesian equation is the fourth degree equation, (((x^2)+(y^2))^2)=2(a^2)((x^2)-(y^2)). The polar equation is (ℽ^2) = 2(a^2)cos(2θ). The locus of the feet of the perpendiculars from the center of an equilateral hyperbola to its tangents is a lemniscate. The name lemniscate is sometimes given to any crunodal symmetric quartic curve having no infinite branch. The name is also sometimes given to a general class of curves derived from other curves in the way that the above is derived from the equilateral hyperbola. With these more general definitions of the lemniscate the above curve is called the lemniscate of Bernoulli.

Lemniscate

A Lemniscate is, in general, a curve generated by a point moving so that the product of its distances…

This medal commemorates the Isthmian Games, celebrated on the Isthmus of Corinth in honor of Neptune. They were celebrated every five years and the reward for the victor was a garland of parsley; originally a branch of pine.

Isthmian Games

This medal commemorates the Isthmian Games, celebrated on the Isthmus of Corinth in honor of Neptune.…

A medal with the portrait of Vespasian engraved on one side; the other side shows a figure representing peace holding an olive branch and burning implements of war before an altar.

Vespasian

A medal with the portrait of Vespasian engraved on one side; the other side shows a figure representing…

A medal containing two circles of heads, each having seven, male and female alike. The heads of the inner circle are divided by spokes. The upper head has on either side of it a Victory offering a crown and palm branch.

Medal with Heads

A medal containing two circles of heads, each having seven, male and female alike. The heads of the…