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Pictured is abronia umbellata. The common name of abronia is sand verbena. The umbellata variety has pink flowers that are about a half inch. The plant is native from California seacoasts to Columbia.

Abronia Umbellata

Pictured is abronia umbellata. The common name of abronia is sand verbena. The umbellata variety has…

Abronia Umbellata are mostly native to California and are recognized by their showy blossoms in dense clusters that are similar to verbena.

Flowers of the Abronia Umbellata Plant

Abronia Umbellata are mostly native to California and are recognized by their showy blossoms in dense…

Abronia Umbellata grow well in light, sandy soil in a fully exposed position. The limbs of the flower like to spread out. Abronia can be sowed in the autumn and planted in the spring.

Habitat of the Abronia Umbellata Plant

Abronia Umbellata grow well in light, sandy soil in a fully exposed position. The limbs of the flower…

"Abutilon macropodum. 1. an unexpanded flower; 2. the stamens and styles; 3. a ripe fruit, consisting of many carpels, whose upper extremities are free and radiant." -Lindley, 1853

Abutilon

"Abutilon macropodum. 1. an unexpanded flower; 2. the stamens and styles; 3. a ripe fruit, consisting…

Abutilon megapotamicum has a drooping habit. The flowers are two to three inches long. The flowers are lemon yellow with a red calyx.

Abutilon Megapotamicum

Abutilon megapotamicum has a drooping habit. The flowers are two to three inches long. The flowers are…

The common name of abutilon is flowering maple. Abutilon is also sometimes called Chinese bellflower. The colors of the flowers are mostly yellow, white, and pink.

Flower of Abutilon

The common name of abutilon is flowering maple. Abutilon is also sometimes called Chinese bellflower.…

The acacia armata shrub is eight to ten feet wide and seven to eleven feet tall. The fruit is ripe is August and the shrub flowers February to April. A common name of acacia armata is kangaroo thorn.

Acacia Armata

The acacia armata shrub is eight to ten feet wide and seven to eleven feet tall. The fruit is ripe is…

The common name of acacia calamifolia is broom wattle. It is a tall shrub with slender, erect branches. The shrub flowers February to April. The fruit is ripe in August.

Acacia Calamifolia

The common name of acacia calamifolia is broom wattle. It is a tall shrub with slender, erect branches.…

The common name of acacia verticillata is whorl-leaved acacia. It is a spreading shrub or small tree of graceful habit. The pods are flat, straight, or slight curved. The flowers appear in March and April.

Acacia Verticillata

The common name of acacia verticillata is whorl-leaved acacia. It is a spreading shrub or small tree…

Pictured are flowers of the orders acanthaceae, myoporaceae, phrymaceae, and plantaginaceae. The flowers illustrated are (1) ruellia, (2) justicia, (3) myoporum, (4) phryma, and (5) plantago.

Orders of Acanthaceae, Myoporaceae, Phrymaceae, and Plantaginaceae

Pictured are flowers of the orders acanthaceae, myoporaceae, phrymaceae, and plantaginaceae. The flowers…

The common name of acantholimon is prickly thrift. The glumaceum variety is six inches tall with small, rose colored flowers. The flowers bloom July to September.

Acantholimon Glumaceum

The common name of acantholimon is prickly thrift. The glumaceum variety is six inches tall with small,…

The acanthorhiza aculeata tree grows thirty to forty feet tall. The tree is spiny at the base. The flowers are a dark, creamy pink.

Acanthorhiza Aculeata

The acanthorhiza aculeata tree grows thirty to forty feet tall. The tree is spiny at the base. The flowers…

This wildflower is common in the high artic and mountains of Eurasia.

Silene Acaulis

This wildflower is common in the high artic and mountains of Eurasia.

The orders of aceraceae, hippocastanaceae, and sapindaceae. The flowers of these orders that are illustrated are (1) acer, (2) aesculus, (3) sapindus, and (4) koelreuteria.

Orders of Aceraceae, Hippocastanaceae, and Sapindaceae

The orders of aceraceae, hippocastanaceae, and sapindaceae. The flowers of these orders that are illustrated…

The <i>Achillea filipendulina</i> plant grows between four and five feet tall. The flowers are yellow and grow in dense heads. The flowers bloom June to September.

Achillea Filipendulina

The Achillea filipendulina plant grows between four and five feet tall. The flowers are yellow and grow…

Achillea millefolium variation rubrum has red flowers. It is a variety of yarrow or milfoil.

Achillea Millefolium Variation Rubrum

Achillea millefolium variation rubrum has red flowers. It is a variety of yarrow or milfoil.

The Pearl variety of <i>Achillea ptarmica</i> is a full double variety. It is one of the most popular of all hardy herbaceous plants.

Achillea Ptarmica Variation the Pearl

The Pearl variety of Achillea ptarmica is a full double variety. It is one of the most popular of all…

The flowers of <i>Achimenes grandiflora</i> are very large and distinctly red tinged. The leaves are mostly large and rusty below.

Achimenes Grandiflora

The flowers of Achimenes grandiflora are very large and distinctly red tinged. The leaves are mostly…

<i>Achimenes longiflora</i> flowers are violet-blue and whitish beneath. The flowers grow alone on each stem. The leaves are opposite or 3-4 whorled.

Achimenes Longiflora

Achimenes longiflora flowers are violet-blue and whitish beneath. The flowers grow alone on each stem.…

"Bixa orellana. 1. a pistil and two stamens; 2. a cross section of the ovary; 3. a ripe fruit. 4. a cross section of a seed." -Lindley, 1853

Achiote

"Bixa orellana. 1. a pistil and two stamens; 2. a cross section of the ovary; 3. a ripe fruit. 4. a…

"Acicarpha spathulata. 1. section of an entire flower; 2. perpendicular section of ripe fruit." -Lindley, 1853

Acicarpha

"Acicarpha spathulata. 1. section of an entire flower; 2. perpendicular section of ripe fruit." -Lindley,…

The flowers of <i>Acidanthera bicolor</i> are creamy white and blotched chocolate-brown within. The flowers are very fragrant.

Acidanthera Bicolor

The flowers of Acidanthera bicolor are creamy white and blotched chocolate-brown within. The flowers…

The flowers of <i>Acineta barkeri</i> are yellow striped with red-brown. The pseudobulbs has a cone shape, are four to five inches long, and usually bear three or more leaves.

Acineta Barkeri

The flowers of Acineta barkeri are yellow striped with red-brown. The pseudobulbs has a cone shape,…

"a poisonous plant, monk's-hood, wolf's-bane."-Whitney, 1902

Aconite

"a poisonous plant, monk's-hood, wolf's-bane."-Whitney, 1902

The Winter Aconite (Eranthis hyemalis) is a European plant in the Ranunculaceae family of buttercups.

Winter Aconite

The Winter Aconite (Eranthis hyemalis) is a European plant in the Ranunculaceae family of buttercups.

A plant which produces numerous flowers with oblong white petals. The leaves and stems are slightly hairy. They are commonly found in central and southern Europe.

Ranunculus Aconitifolius

A plant which produces numerous flowers with oblong white petals. The leaves and stems are slightly…

The common name of <i>Aconite autumnal</i> is autumn aconite. The stem is three to five feet tall. The leaves are five lobed. The flowers are blue, lilac, or whitish and grow in a simple spike.

Aconitum Autumnale

The common name of Aconite autumnal is autumn aconite. The stem is three to five feet tall. The leaves…

The common names of <i>Aconite napellus</i> are true monkshood and officinal aconite. It is the most poisonous species. The flowers are blue and grow on erect stems.

Aconitum Napellus

The common names of Aconite napellus are true monkshood and officinal aconite. It is the most poisonous…

The common name of <i>Aconite uncinatum</i> is wild monkshood. The flowers are blue and the leaves are thick, and deeply cut into 3-5 cut toothed lobes. The stem is slender and 3-5 feet tall.

Aconitum Uncinatum

The common name of Aconite uncinatum is wild monkshood. The flowers are blue and the leaves are thick,…

"Red Baneberry, showing flowering plant and fruiting raceme."-Whitney, 1902

Actaea

"Red Baneberry, showing flowering plant and fruiting raceme."-Whitney, 1902

<I>Actinide argot</i> is a high climbing shrub. There are three or more white flowers. The fruit is greenish yellow, about one inch long, and sweet.

Actinidia Arguta

Actinide argot is a high climbing shrub. There are three or more white flowers. The fruit is greenish…

The leaves of <i>Actinoepis coronary</i> are opoosite, except for the upper ones. The flowers are some of the prettiest of annual flowers.

Actinolepis Coronaria Flower

The leaves of Actinoepis coronary are opoosite, except for the upper ones. The flowers are some of the…

The ada aurantiaca is an orchid that is an orange-scarlet color. Each flower is streaked with black on the inside. There are six to ten blossoms on each long, hanging stem.

Ada Aurantiaca Orchid

The ada aurantiaca is an orchid that is an orange-scarlet color. Each flower is streaked with black…

<i>Ada aurantiaca</i> has pseudobulbs that are two to three inches long. The petals and sepals of the flowers are twice as long as the lip.

Ada Aurantiaca

Ada aurantiaca has pseudobulbs that are two to three inches long. The petals and sepals of the flowers…

Lphioglossum (adder's-tongue) is a genus of about 25-30 species of Ophioglossales in the family Ophioglossaceae, with a cosmopolitan but primarily tropical and subtropical distribution. The name Ophioglossum comes from the Greek, and means "snake-tongue". Adders-tongues are so-called because the spore-bearing stalk is thought to resemble a snake's tongue. Each plant typically sends up a small, undivided leaf blade with netted venation, and the spore stalk forks from the leaf stalk, terminating in sporangia which are partially concealed within a structure with slitted sides.

Adderstongue

Lphioglossum (adder's-tongue) is a genus of about 25-30 species of Ophioglossales in the family Ophioglossaceae,…

Each adonis aestivalis flower has five to fifteen petals. This variety can reach one foot in height. This is an annual variety of pheasant's eye.

Habit and Flower of Adonis Aestivalis

Each adonis aestivalis flower has five to fifteen petals. This variety can reach one foot in height.…

The common name of <i>Adonis vernal</i> is spring adonis. The flowers are large with 10-15 petals. The flowers bloom in early spring.

Adonis Vernalis

The common name of Adonis vernal is spring adonis. The flowers are large with 10-15 petals. The flowers…

<i>Aechmea miniata variety discolor</i> has purple leaves or leaves that are violet-brown on the back.

Aechmea Miiniata Variety Discolor

Aechmea miniata variety discolor has purple leaves or leaves that are violet-brown on the back.

The leaves of <i>Aerides odoratum</i> are six to eight inches long and up to two inches broad. The flowers are about one inch long and are very fragrant.

Aerides Odoratum

The leaves of Aerides odoratum are six to eight inches long and up to two inches broad. The flowers…

"&AElig;sculus Hippocastanum (a, flower; b, seed; c, seed cut longitudinally."-Whitney, 1902

Aesculus

"Æsculus Hippocastanum (a, flower; b, seed; c, seed cut longitudinally."-Whitney, 1902

<i>Aesculus georgiana</i> is a shrub that grows six feet tall. The flowers are red and yellow. The shrub flowers in May and June.

Aesculus Georgiana

Aesculus georgiana is a shrub that grows six feet tall. The flowers are red and yellow. The shrub flowers…

African marigold is the common name of tagetes erecta. These marigolds are employed for summer bedding. African marigolds are lemon or orange colored.

African Marigold

African marigold is the common name of tagetes erecta. These marigolds are employed for summer bedding.…

The common names of <i>agapanthus umbellatus</i> are African Lily and Lily-of-the-Nile. The flowers are blue and grow ten to thirty in an umbel. The leaves are two feet long and numerous.

Agapanthus Umbellatus

The common names of agapanthus umbellatus are African Lily and Lily-of-the-Nile. The flowers are blue…

Pictured is <i>Agave americana</i> as commonly grown in greenhouses. It is the yellow margined form.

Agave Americana

Pictured is Agave americana as commonly grown in greenhouses. It is the yellow margined form.

The leaves of <i>Agave americana</i> are smooth, gray, and lance shaped. The plant has moderately large gray prickles.

Agave Americana in Flower

The leaves of Agave americana are smooth, gray, and lance shaped. The plant has moderately large gray…

The inflorescence of agave attenuata is five to ten feet long. The flowers are paired, about two inches.

Flowers of Agave Attenuata

The inflorescence of agave attenuata is five to ten feet long. The flowers are paired, about two inches.

The flower of the agave densiflora is a yellowish red color and about two inches long. Thirty to forty leaves make up a stemless rosette at the base of the plant. The leaves are bright green when mature.

Agave Densiflora Flower

The flower of the agave densiflora is a yellowish red color and about two inches long. Thirty to forty…

Littaea geminiflora, or the Twin-Flowered Agave, showing the flower and the whole plant.

Twin-Flowered Agave

Littaea geminiflora, or the Twin-Flowered Agave, showing the flower and the whole plant.

The leaves of <i>Ageratum houstonianum</i> are heart shaped at the base. The flowers are blue.

Ageratum Houstonianum

The leaves of Ageratum houstonianum are heart shaped at the base. The flowers are blue.

"Agrimony (Agrimonia Eupatoria) showing branch, flowering spray, and fruit."-Whitney, 1902

Agrimensor

"Agrimony (Agrimonia Eupatoria) showing branch, flowering spray, and fruit."-Whitney, 1902

Pictured are the flower and bud of <i>Agrimonia euphoria</i>. The common name of the plant is common agrimony. The plant grows two to three feet high in little clumps from a short rootstock.

Agrimonia Eupatoria

Pictured are the flower and bud of Agrimonia euphoria. The common name of the plant is common agrimony.…

The flowers of <i>Akebia quint</a> are purple and fragrant. The flowers appear in early spring.

Akebia Quinata Flower

The flowers of Akebia quint are purple and fragrant. The flowers appear in early spring.

Akene of Anemone, enlarged,(Gray, 1858).

Anemone Akene

Akene of Anemone, enlarged,(Gray, 1858).

Akene of Anemone, enlarged, cut in half to show the seed in it, (Gray, 1858).

Anemone Akene

Akene of Anemone, enlarged, cut in half to show the seed in it, (Gray, 1858).

Akene of Clematis and feathery tail, (Gray, 1858).

Clematis Akene

Akene of Clematis and feathery tail, (Gray, 1858).

A popular fern with variagated fronds that are straw-colored. It thrives on acidic soil.

Pteris Cretica Albolineata

A popular fern with variagated fronds that are straw-colored. It thrives on acidic soil.

Blossom of an alfalfa plant, one of the oldest types of hay currently grown.

Alfalfa blossoms

Blossom of an alfalfa plant, one of the oldest types of hay currently grown.

Alismaceae is an order of herbaceous marsh plants with milky juice. Butomaceae is an order of aquatic or marsh herbs. Hydrocharitaceae is an order of submerged aquatic herbs. Pictured are various parts of flowers of those orders.

Alismaceae, Butomaceae, and Hydrocharitaceae Orders

Alismaceae is an order of herbaceous marsh plants with milky juice. Butomaceae is an order of aquatic…

<i>Allamanda cathartica variety hendersonii</i> is tall, vigorous, and free flowering. The leaves are large, thick, and leathery.

Allamanda Cathartica Variety Hendersonii

Allamanda cathartica variety hendersonii is tall, vigorous, and free flowering. The leaves are large,…

"Allaria officinalis. a, upper part of stem, with leaves and flowers; b, extremity of a branch, in fruit." &mdash; Chambers' Encyclopedia, 1875

Allaria Officinalis

"Allaria officinalis. a, upper part of stem, with leaves and flowers; b, extremity of a branch, in fruit."…