183 illustrations of flowers and shrubs including: harebell, hawkweed, heartsease, heath, hemlock, hemp, hibiscus, holly, honeysuckle, hop, horehound, horsetail, houseleek, huckleberry, hydrangea, and hyssop

An illustration of the hop plant. Humulus, (hop) is a small genus of flowering plants, native to the temperate Northern Hemisphere. The female flowers of one species are called hops, and are used as flavoring and stabilizers, especially for brewing beer. The hop is part of the family Cannabaceae, which also includes the genus Cannabis (hemp).

Hop

An illustration of the hop plant. Humulus, (hop) is a small genus of flowering plants, native to the…

The hop (Humulus) is a small genus of flowering plants, native to the temperate Northern Hemisphere. The female flowers, commonly called hops, are used as flavoring and stabilizers during beer brewing. The hop is part of the family Cannabaceae, which also includes the genus cannabis (also known as hemp). Hops are the female flower cones of the hop plant (Humulus lupulus). They are used primarily as a flavoring and stability agent in beer, and also in other beverages and in herbal medicine. The first documented use in beer is from the eleventh century. Hops contain several characteristics favorable to beer, balancing the sweetness of the malt with bitterness, contributing flowery, citrus, fruity or herbal aromas, and having an antibiotic effect that favors the activity of brewer's yeast over less desirable microorganisms. The hop plant is a vigorous climbing herbaceous perennial, usually grown up strings in a field called a hopfield, hop garden or hop yard. Many different varieties of hops are grown by farmers all around the world, with different types being used for particular styles of beer.

Hops

The hop (Humulus) is a small genus of flowering plants, native to the temperate Northern Hemisphere.…

Of the mint family (Labiatae), the horehound (Marrubium vulgare).

Horehound

Of the mint family (Labiatae), the horehound (Marrubium vulgare).

It is a slender aquatic herb, with whorled, finely dissected rigid leaves, and small solotary monoecious flowers, without calyx or corolla. it is common in pools or slow streams over a great part of the world.

Hornwort

It is a slender aquatic herb, with whorled, finely dissected rigid leaves, and small solotary monoecious…

A perennial plant used as a condiment.

Horseradish

A perennial plant used as a condiment.

Upper part of a stem of a Horsetail, Equisetum sylvaticum.

Horsetail

Upper part of a stem of a Horsetail, Equisetum sylvaticum.

Horsetail, view of under side of the shield-shaped body, bearing a circle of spore-cases.

Horsetail

Horsetail, view of under side of the shield-shaped body, bearing a circle of spore-cases.

Horsetail, view spore-case from the under side of the shield-shaped body.

Horsetail

Horsetail, view spore-case from the under side of the shield-shaped body.

Horsetail, view of a spore with the attached arms moistened.

Horsetail

Horsetail, view of a spore with the attached arms moistened.

Horsetail, view of a spore with the attached arms dry.

Horsetail

Horsetail, view of a spore with the attached arms dry.

An illustration of a fertile branch of horsetail and spore of equisetum with unrolled elaters.

Horsetail

An illustration of a fertile branch of horsetail and spore of equisetum with unrolled elaters.

Of the Composite family (Compositae), horseweed (Erigeron Canadensis).

Horseweed

Of the Composite family (Compositae), horseweed (Erigeron Canadensis).

Hottentot fig flowers are large and yellow or purple. The fruit is edible.

Hottentot Fig

Hottentot fig flowers are large and yellow or purple. The fruit is edible.

Of the Borage family (Boraginaceae), the hound's tongue (Cynoglossum officinale).

Hound's Tongue

Of the Borage family (Boraginaceae), the hound's tongue (Cynoglossum officinale).

Cynoglossum officinale (hound's tongue, dog's tongue, gypsy flower, and rats and mice due to its smell) is a herbaceous plant of the family Boraginaceae, found in most parts of Europe, and also North America where it was accidentally introduced. It can be either annual or biennial, with reddish-purple flowers blooming between May and September. It lives in wet places, waste land and hedges.

Hound's Tongue

Cynoglossum officinale (hound's tongue, dog's tongue, gypsy flower, and rats and mice due to its smell)…

Illustrated is a bur of hound's tongue, or cynoglossum.

Hound's Tongue

Illustrated is a bur of hound's tongue, or cynoglossum.

The houseleek is a fleshy plant, or succulent, which stores its nourishment in its leaves.

Houseleek

The houseleek is a fleshy plant, or succulent, which stores its nourishment in its leaves.

A young sprout of a Houseleek.

Houseleek

A young sprout of a Houseleek.

House leek (Sempervivum), with offsets.

Houseleek

House leek (Sempervivum), with offsets.

A young plant of the Houseleek, with the leaves (not yet expanded) numbered, and exhibiting the 13-ranked arrangement; and sowing secondary spirals.

Houseleek

A young plant of the Houseleek, with the leaves (not yet expanded) numbered, and exhibiting the 13-ranked…

Of the Madder family (Rubiaceae), the bluets (Houstonia caerulea).

Houstonia Bluets

Of the Madder family (Rubiaceae), the bluets (Houstonia caerulea).

The common name of houstonia caerulea is bluets. The flowers are usually a light blue color but they are sometimes white. Each stem has one flower. The flowers bloom in the summer.

Houstonia Caerulea

The common name of houstonia caerulea is bluets. The flowers are usually a light blue color but they…

Of the Madder family (Rubiaceae), the large houstonia (Houstonia purpurea).

Large Houstonia

Of the Madder family (Rubiaceae), the large houstonia (Houstonia purpurea).

The common name of hoya carnosa is wax flower. This form has variegated leaves.

Hoya Carnosa Variegata

The common name of hoya carnosa is wax flower. This form has variegated leaves.

The common name of hoya carnosa is wax flower. The flowers are a pinkish white color. The flowers bloom in the summer.

Flowering Stem of Hoya Carnosa

The common name of hoya carnosa is wax flower. The flowers are a pinkish white color. The flowers bloom…

The Huito (Genipa americana) is a small tree with edible fruit in the madder family, Rubiaceae.

Huito

The Huito (Genipa americana) is a small tree with edible fruit in the madder family, Rubiaceae.

The flower heads of humea elegans are brownish red, pink, or crimson. The flowers bloom July to October. The shrub grows between five and six feet tall.

Humea Elegans

The flower heads of humea elegans are brownish red, pink, or crimson. The flowers bloom July to October.…

The common name of humulus lupulus is hop or common hop. The flowers are greenish yellow. The flowers bloom in the summer. The heads of the fruit are used in brewing.

Portion of Female Inforlescence of Humulus Lupulus

The common name of humulus lupulus is hop or common hop. The flowers are greenish yellow. The flowers…

Purple flowering plant belonging to the lily family.

Hyacinth

Purple flowering plant belonging to the lily family.

A flowering plant native to the eastern Mediterranean region.

Hyacinth

A flowering plant native to the eastern Mediterranean region.

"Bulb of hyacinth. Exterior view and split lengthwise." -Bergen, 1896

Hyacinth Bulb

"Bulb of hyacinth. Exterior view and split lengthwise." -Bergen, 1896

Common hyacinth is the common name of hyacinthus orientalis. The flowers are fragrant and clustered. The flowers bloom in spring.

Common Hyacinth

Common hyacinth is the common name of hyacinthus orientalis. The flowers are fragrant and clustered.…

The flowers of the double flowered garden hyacinth are small and rosette like. This variety is not cultivated as often as the single flowered variety.

Double Flowered Variety of the Garden Hyacinth

The flowers of the double flowered garden hyacinth are small and rosette like. This variety is not cultivated…

Of the hyacinth family (Hyacinthaceae), the Star-of-Bethlehem or Ornithogalum umbellatum.

Star of Bethlehem Hyacinth

Of the hyacinth family (Hyacinthaceae), the Star-of-Bethlehem or Ornithogalum umbellatum.

"Eichhornia speciosa; 1. pistil; 2. transverse section of the ovary." -Lindley, 1853

Water Hyacinth

"Eichhornia speciosa; 1. pistil; 2. transverse section of the ovary." -Lindley, 1853

Hippeastrums are native to tropical South America. The flowers range in color from red to white. Some flowers are also blended with a variety of colors.

Hybrid Hippeastrums

Hippeastrums are native to tropical South America. The flowers range in color from red to white. Some…

Hybrid forms of lantana are employed for greenhouse decoration and for bedding out purposes. Flowers are red, golden, or white.

Inflorescence and Detached Flower of Hybrid Lantana

Hybrid forms of lantana are employed for greenhouse decoration and for bedding out purposes. Flowers…

The Hydnora africana is a parasitic plant growing in deserts known for giving of the odor of feces to attract pollinators like dung beetles.

Hydnora africana

The Hydnora africana is a parasitic plant growing in deserts known for giving of the odor of feces to…

The longitudinal section of the Hydnora africana is a parasitic plant growing in deserts known for giving of the odor of feces to attract pollinators like dung beetles.

Hydnora africana

The longitudinal section of the Hydnora africana is a parasitic plant growing in deserts known for giving…

This variety of plant is distributed widely and encompasses a wide variety of herbs. Hydrangea are cultivated as an ornamental plant.

Hydrangea

This variety of plant is distributed widely and encompasses a wide variety of herbs. Hydrangea are cultivated…

In the Hydrangea all the blossoms are neutral, and no fruit is formed (Gray, 1858).

Hydrangea

In the Hydrangea all the blossoms are neutral, and no fruit is formed (Gray, 1858).

A hydrangea used for an experiment.

Hydrangea

A hydrangea used for an experiment.

"1. Hydrangeaa virens and its flower. 2. seed-vessel of H. hortensis; 3. its seed; 4. a section of it." -Lindley, 1853

Hydrangea

"1. Hydrangeaa virens and its flower. 2. seed-vessel of H. hortensis; 3. its seed; 4. a section of it."…

Compound cyme of Hydrangea arborescens, with neutral enlarged flowers round the circumference.

Hydrangea arborscens

Compound cyme of Hydrangea arborescens, with neutral enlarged flowers round the circumference.

Hydrangea hortensis is the common hydrangea. The flowers vary in color according to the soil in which the plant is grown. The flowers bloom April to September. The plant grows between two and three feet tall.

Hydrangea Hortensis

Hydrangea hortensis is the common hydrangea. The flowers vary in color according to the soil in which…

Hydrangea paniculata grandiflora has white flowers. The flowers are small and star shaped. The flowers bloom in summer and autumn.

Habit and Detached Single Flower of Hydrangea Paniculata Grandiflora

Hydrangea paniculata grandiflora has white flowers. The flowers are small and star shaped. The flowers…

Leaves floating flat on surfacel inflourescences minute and inconspicuos.

Hydrochloa

Leaves floating flat on surfacel inflourescences minute and inconspicuos.

Leaves small, about 8 cm. in diameter or less; toothed or lobed.

Hydrocotyle

Leaves small, about 8 cm. in diameter or less; toothed or lobed.

Leaves round, often peltate; the long petiole attached near center of leaf.

Hydrocotyle

Leaves round, often peltate; the long petiole attached near center of leaf.

Leaves coming off a creeping or horizontal stem.

Hydrocotyle

Leaves coming off a creeping or horizontal stem.

Sepals united at base into a tube enclosing the ovary and later the fruit; leaves with spines in axils.

Hydrolea

Sepals united at base into a tube enclosing the ovary and later the fruit; leaves with spines in axils.

The flowers of hydrolea spinosa are pale blue. The flowers bloom in July. The stem is thorny.

Flowering Stem of Hydrolea Spinosa

The flowers of hydrolea spinosa are pale blue. The flowers bloom in July. The stem is thorny.

Plants aromatic when crushed; flowers blue.

Hydrotrida

Plants aromatic when crushed; flowers blue.

flowers solitary or a few in hte axils of the leaves.

Hygrophila

flowers solitary or a few in hte axils of the leaves.

Hylocereus fruit is a juicy fruit of a cactus with good flavor.

Hylocereus Fruit

Hylocereus fruit is a juicy fruit of a cactus with good flavor.

Flowers with filaments connected by a funnel-like membrane.

Hymenocallis

Flowers with filaments connected by a funnel-like membrane.

Hymenocallis andreana has white flowers. The flowers grow on slender, one flowered scapes. The leaves are pale green. The plant grows one and a half feet tall.

Hymenocallis Andreana

Hymenocallis andreana has white flowers. The flowers grow on slender, one flowered scapes. The leaves…

Leaf, when examined against light with lens, showing semitransparent dots; flowers yellow or pink.

Hypericum

Leaf, when examined against light with lens, showing semitransparent dots; flowers yellow or pink.

The common names of hypericum androsaemum are sweet amber and common tutsan. The flowers are large and grow at the ends of the stems. The flowers bloom in summer. The shrub grows to be three feet tall.

Habit and Detached Flower of Hypericum Androsaemum

The common names of hypericum androsaemum are sweet amber and common tutsan. The flowers are large and…

The common names of hypericum perforatum are common hypericum and St. John's wort. The flowers are bright yellow and grow in clusters at the end of the stems. The petals are marked with black dots. The shrub grows between one and three feet tall.

Dehiscing Capsule and Portion and Inflorescence of Hypericum Perforatum

The common names of hypericum perforatum are common hypericum and St. John's wort. The flowers are bright…