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The common name of physianthus albens is white bladder flower. The flower is white with a tinge of red. The flowers bloom in July.

Physianthus Albens

The common name of physianthus albens is white bladder flower. The flower is white with a tinge of red.…

The common names of phytolacca decandra are Virginian poke weed, pigeon-berry and red-ink plant. The flowers are white. In the autumn dark purple berries appear that are filled with crimson juice. The roots are large, fleshy, and poisonous.

Racemose Inflorescence of Phytolacca Decandra

The common names of phytolacca decandra are Virginian poke weed, pigeon-berry and red-ink plant. The…

Pictured is a potato leaf that has been attacked by phytophthora infestans. Phytophthora infestans is a fungus commonly known as the potato disease fungus. Brown spots appear on the leaves. The lower surface of the spot bears a thin, whitish coating.

Potato Leaf Attacked by Phytophthora Infestans

Pictured is a potato leaf that has been attacked by phytophthora infestans. Phytophthora infestans is…

The common names of picea excelsa are burgundy pitch tree and Norway spruce fir. The leaves are scattered and have four sides.

Picea Excelsa

The common names of picea excelsa are burgundy pitch tree and Norway spruce fir. The leaves are scattered…

Pilocereus brunnowii is a type of cactus. The stem is erect and cylindrical. There are about thirteen prickles surronded by long white hairs.

Pilocereus Brunnowii

Pilocereus brunnowii is a type of cactus. The stem is erect and cylindrical. There are about thirteen…

The pilocereus dautwitzii cactus as a bright green, oblong stem. Tufts of small white spines spread out from the stem.

Pilocereus Dautwitzii

The pilocereus dautwitzii cactus as a bright green, oblong stem. Tufts of small white spines spread…

The common name of pimelea is rice flower. The ligustrina hypericina variety has white flowers in round heads. The plant grows between five and six feet tall.

Pimelea Ligustrina Hypericina

The common name of pimelea is rice flower. The ligustrina hypericina variety has white flowers in round…

The common names of pinguicula vulgaris are bog violet and butter root. The flowers are violet and bloom May to July. The leaves are one to three inches long.

Pinguicula Vulgaris

The common names of pinguicula vulgaris are bog violet and butter root. The flowers are violet and bloom…

Pine beauty moth is the common name of trachea piniperda. This moth is a heavy bodied insect with variegated wings of a reddish brown color. The wings are mottled with orange, yellow, white and sometimes green.

Pine Beauty Moth

Pine beauty moth is the common name of trachea piniperda. This moth is a heavy bodied insect with variegated…

Swiss stone pine is the common name of pinus cembra. The leaves are marked with silver lines and are slender and flexible. The tree grows between fifty and one hundred fifty feet tall.

Swiss Stone Pine

Swiss stone pine is the common name of pinus cembra. The leaves are marked with silver lines and are…

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 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 order marattiaceae, and the maratiia family, consists of stately tropical ferns with thickened, often erect, stems. The leaves are usually very large. The ophioglossaceae order has plants of small or medium size, often somewhat fleshy.

Marattiaceae and Ophioglossaceae

The order marattiaceae, and the maratiia family, consists of stately tropical ferns with thickened,…

The hymenophyllaceae order consists of very delicate ferns. The cyatheaceae order usually consists of tree ferns with large leaves. The polypodiaceae order consists of ferns of very diverse habit.

Hymenophyllaceae, Cyatheaceae, and Polypodiaceae

The hymenophyllaceae order consists of very delicate ferns. The cyatheaceae order usually consists of…

Cycadaceae is an order with more or less woody plants. The stems are thick, unbranched, columnar, or tuberous. Ginkogoaceae is an order of much branched trees with deciduous leaves.

Cycadaceae and Ginkogoaceae

Cycadaceae is an order with more or less woody plants. The stems are thick, unbranched, columnar, or…

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 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 are leaves of various varieties of acacia. These varieties include (1) longifolia, (2) pravissima, (3) cyclops, (4) binervata, (5) implexa, (6) pycnantha, (7) saligna, (8) podalyriaefolia, and (9) melanoxylon.

Acacia Leaves

Pictured are leaves of various varieties of acacia. These varieties include (1) longifolia, (2) pravissima,…

Silver wattle is the common name of acacia decurrens variation dealbata. The tree is fifty or more feet high. The leaves are silver-gray to light green and grow in thirteen to twenty five pairs on the branches. The pods are wide, smooth, and a rich brown color.

Silver Wattle

Silver wattle is the common name of acacia decurrens variation dealbata. The tree is fifty or more feet…

Red-Hot Cat-Tail is the common name of acalypha hispida. This shrub is cultivated for its long red spikes of flowers. The flower spikes are much longer than the leaves.

Red-Hot Cat-Tail

Red-Hot Cat-Tail is the common name of acalypha hispida. This shrub is cultivated for its long red spikes…

Acalypha wilkesiana variation macafeana has red leaves marked with crimson and bronze. It is said to be the most common variety of acalypha.

Acalypha Wilkesiana Variation Macafeana

Acalypha wilkesiana variation macafeana has red leaves marked with crimson and bronze. It is said to…

Acanthopanax ricinifolium variation maximowiczii has leaves that are deeply 5-7 lobed. The lobes are oblong and lance shaped. It is a very ornamental tree.

Acanthopanax Ricinifolium Variation Maximowiczii

Acanthopanax ricinifolium variation maximowiczii has leaves that are deeply 5-7 lobed. The lobes are…

The trunk of the acanthophoenix crinita tree is fifty to sixty feet tall. The leaves are seven to thirteen feet long. Young plants have pale yellowish green leaves.

Acanthophoenix Crinita

The trunk of the acanthophoenix crinita tree is fifty to sixty feet tall. The leaves are seven to thirteen…

Pictured is an acanthus decoration of an architectural column. Supposedly the acanthus leaves afforded the suggestion for the foliage decoration on the capital of the Corinthian and other columns.

Acanthus Decoration

Pictured is an acanthus decoration of an architectural column. Supposedly the acanthus leaves afforded…

Acanthus spinosissimus leaves are dark green. The leaves are arranged on a common stalk.

Acanthus Spinosissimus

Acanthus spinosissimus leaves are dark green. The leaves are arranged on a common stalk.

The common name of acanthus is bear's breech. The mollis variety has wavy leaves.

Acanthus Mollis

The common name of acanthus is bear's breech. The mollis variety has wavy leaves.

Pictured is a pasture maple in autumn, showing the strong framework.

Pasture Maple

Pictured is a pasture maple in autumn, showing the strong framework.

Acer miyabei is a variety of maple. The tree grows up to forty feet tall and the branches are corky. The leaves are five lobed.

Acer Miyabei

Acer miyabei is a variety of maple. The tree grows up to forty feet tall and the branches are corky.…

Pictured is an upright tip shoot of Norway maple. Norway maple is the common name of <i>Acer platanoides</i>. The leaves are five lobed and light green.

Norway Maple

Pictured is an upright tip shoot of Norway maple. Norway maple is the common name of Acer platanoides.…

The leaves of acer japonicum are 7-11 lobed and 3-6 inches across. The leaves are light green with silky hairs.

Acer Japonicum

The leaves of acer japonicum are 7-11 lobed and 3-6 inches across. The leaves are light green with silky…

Acer ginnala grows twenty feet tall. The leaves are three lobes. The flowers are yellowish and fragrant.

Acer Ginnala

Acer ginnala grows twenty feet tall. The leaves are three lobes. The flowers are yellowish and fragrant.

The common names of acer saccharinum are white or silver maple. The tree is large, about one hundred twenty feet tall. The leaves are deeply five lobed. The leaves are green above, silvery white beneath, and four to six inches long.

Acer Saccharinum

The common names of acer saccharinum are white or silver maple. The tree is large, about one hundred…

Common sugar maple and rock maple are the common names of acer saccharum. The leaves are 3-5 lobed and 3-6 inches long.

Common Sugar Maple

Common sugar maple and rock maple are the common names of acer saccharum. The leaves are 3-5 lobed and…

Black sugar maple is the common name of acer nigrum. The leaves are generally three lobed and five to six inches across. The tree has black bark.

Black Sugar Maple

Black sugar maple is the common name of acer nigrum. The leaves are generally three lobed and five to…

<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.…

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…

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,…

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,…

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…

<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 leaves of adiantum farleyense often reach between fifteen and twenty four inches in length. The leaflets are wedge shaped at the base with curved sides.

Adiantum Farleyense

The leaves of adiantum farleyense often reach between fifteen and twenty four inches in length. The…

The leaves of <i>Adiantum continuum</i> are twelve to eighteen inches long and grow on stout, black stalks. This fern is found from Mexico to Brazil.

Pinna of Adiantum Concinnum

The leaves of Adiantum continuum are twelve to eighteen inches long and grow on stout, black stalks.…

The leaves of <i>Adiantum capillus-veneris</i> are six to twenty inches long and three to each inches wide. The leaflets are nearly a half inch wide and are irregularly lobed.

Pinna of Adiantum Capillus-Veneris

The leaves of Adiantum capillus-veneris are six to twenty inches long and three to each inches wide.…

<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…

Common horse chestnut is the common name of <i>Aesculus hippocastanum</i>. The tree is large, between sixty and eighty feet tall. The flowers are white tinged with red.

Opening Foliage of Common Horse Chestnut

Common horse chestnut is the common name of Aesculus hippocastanum. The tree is large, between sixty…

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…

The <i>Agates orientalist</i> tree grows one hundred feet tall. The leaves are opposite or alternate. The cones are globe shaped.

Agathis Orientalis

The Agates orientalist tree grows one hundred feet tall. The leaves are opposite or alternate. The cones…

The leaves of <i>Agave franzosinii</i> are lance shaped, roughish, and white. The leaves are also have a large, narrowly grooved spine and dark or gray prickles.

Agave Franzosinii

The leaves of Agave franzosinii are lance shaped, roughish, and white. The leaves are also have a large,…

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…

Pictured is the cross section of a leaf of <i>Agave attenuate</i>. The leaves are spreading with recurved tips. The leaves are usually 6-10 inches by 25-30 inches.

Cross Sections of Leaf of Agave Attenuata

Pictured is the cross section of a leaf of Agave attenuate. The leaves are spreading with recurved tips.…

<i>Agave angustissima</i> is a closely allied form with agave schidigera. The leaves are often narrow and reddened. The flowers are stalked.

Agave Angustissima

Agave angustissima is a closely allied form with agave schidigera. The leaves are often narrow and reddened.…

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.

<i>Aglaonema costatum</i> is very dwarf and compact. The leaves are thick, heart shaped, and three inches wide. The leaves are dark green with an ivory white midrib and scattered blotches of white.

Aglaonema Costatum

Aglaonema costatum is very dwarf and compact. The leaves are thick, heart shaped, and three inches wide.…

<i>Ajuga reptans variety variegate</i> has leaves splashed and edged with creamy yellow.

Ajuga Reptans Variety Variegata

Ajuga reptans variety variegate has leaves splashed and edged with creamy yellow.

<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,…

The common name of <i>Allium fistulosum</i> is welsh onion. It has no distinct bulb, but only an enlarged base or crown. The leaves are usually clustered.

Allium Fistulosum

The common name of Allium fistulosum is welsh onion. It has no distinct bulb, but only an enlarged base…

The flowers of <i>Allium moly</i> are numerous and appear in early spring. The leaves are flat and broad.

Allium Moly

The flowers of Allium moly are numerous and appear in early spring. The leaves are flat and broad.