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A capital letter A with a leafy decoration.

Leafy Capital A

A capital letter A with a leafy decoration.

A genus of plants or shrubs, mostly tropical, two species of which arecharacterized by large white flowers and deeply indented shining leaves.

Acanthus

A genus of plants or shrubs, mostly tropical, two species of which arecharacterized by large white flowers…

Acanthus of Corinthian Capital

Acanthus

Acanthus of Corinthian Capital

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.

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.

Large herb with a very stout stem, often from 1 to 3dm in diameter at base, over 1.5m tall.

Acnida

Large herb with a very stout stem, often from 1 to 3dm in diameter at base, over 1.5m tall.

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…

Plants aromatic when crushed.

Acorus

Plants aromatic when crushed.

"a, leaflets attacked by a larva of A. juglandis; b, case of larva; c, wings of A. nebulo; d, wings of A. juglandis; e, wings of A. nebulo var."-Whitney, 1902

Acrobasis

"a, leaflets attacked by a larva of A. juglandis; b, case of larva; c, wings of A. nebulo; d, wings…

"a, case containing caterpillar; b, cases in winter; c, head and thoracic joints of larva, enlarged; d, moth (the cross shows natural walnut case-bearer, feeds upon walnut and hickory, fastening the leaves together and skeletonizing them from base to tip."-Whitney, 1902

Acrobasis

"a, case containing caterpillar; b, cases in winter; c, head and thoracic joints of larva, enlarged;…

Also known as Butcher's broom. A shrub with flat shoots that give the appearance of stiff, spine-tipped leaves. It has been known to enhance blood flow to the brain, legs, and hands, and has been used to relieve constipation and water retention.

Ruscus Aculeatus

Also known as Butcher's broom. A shrub with flat shoots that give the appearance of stiff, spine-tipped…

Tapering at the end.

Acuminate

Tapering at the end.

"Acuminate Leaf"-Whitney, 1902

Acuminate

"Acuminate Leaf"-Whitney, 1902

Terminating with a sharp point.

Acute

Terminating with a sharp point.

"Acute Leaves, 'sharp at the end'"-Whitney, 1902

Acute Leaves

"Acute Leaves, 'sharp at the end'"-Whitney, 1902

A plant with large fleshy leaves that yields many products. It is a tall plant with a spiny top that only blossoms after ten to seventy years.

Agave

A plant with large fleshy leaves that yields many products. It is a tall plant with a spiny top that…

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.…

Leaves - compound (odd-feathered, but with the odd leaflet often dwarfed or broken off; leaflets, twenty-one to forty-one); alternate; edge of the leaflets entire, with one or two coarse, blunt teeth at each side of their base. Outline - of leaflet, long egg-shape or lance-shape. Apex - taper-pointed. Base, squared, or heart-shaped. Leaf/Stem - smooth, round, swollen at base. Leaflet/Stems - smooth and short. Leaf - one and a half to six feet long. Leaflets variable, usually about six inches by two and a quarter, rather smooth and thin. Bark - of the trunk, smooth and brown; the new shoots marked with whitish dots. Flowers - in long bunches at the ends of the branches; greenish, and of very disagreeable odor. June, July. Seeds - flat, at the centre of greenish and sometimes pink-tinged wings, in large, loose clusters. October. Found - common in cultivation, and to some extent naturalized. General Information - A large, showy tree (sixty to seventy feet high) of remarkable vigorous and rapid growth. It is a native of China. A Jesuit missionary sent its seeds in 1751 to England. In 1784 it was brought from Europe to the United States, and started near Philadelphia. Also about 1804 it was brought to Rhode Island from South America. But the source of most of the trees now found abundantly in the region of New York is Flushing, Long Island, where it was introduced in 1820. It has been a great favorite, and would deserve to be so still were it not for the peculiar and disagreeable odor of its flowers. Ailanthus, from a Greek word meaning "tree of heaven." Ailanthus - This spelling of the name should rule because so given by its author, although, etymologically, Ailantus would be correct, the native Amboyna name being "Aylanto."

Genus Ailanthus, Desf.

Leaves - compound (odd-feathered, but with the odd leaflet often dwarfed or broken off; leaflets, twenty-one…

Also known as Salix alaxensis. The branch of an Alaska Willow tree, a species of willow.

Branch of Alaska Willow

Also known as Salix alaxensis. The branch of an Alaska Willow tree, a species of willow.

"Aldrovanda vesiculosa. Whorl of Leaves." &mdash; The Encyclopedia Britannica, 1893

Aldrovanda

"Aldrovanda vesiculosa. Whorl of Leaves." — The Encyclopedia Britannica, 1893

"Aldrovanda vesiculosa. Leaf pressed open and enlarged, showing glands, sensitive filaments, and quadrifid hairs." &mdash; The Encyclopedia Britannica, 1893

Aldrovanda

"Aldrovanda vesiculosa. Leaf pressed open and enlarged, showing glands, sensitive filaments, and quadrifid…

Fruits borne in a ring; stamens 6; inflourescences much branched.

Alisma

Fruits borne in a ring; stamens 6; inflourescences much branched.

Leaf, when examined with hand lends, not showing zones.

Alismaceae

Leaf, when examined with hand lends, not showing zones.

Leaves with several prominent rib-like veins running from base to apex.

Alismaceae

Leaves with several prominent rib-like veins running from base to apex.

Leaves with several very prominent ribs running from base to apex.

Alismaceae

Leaves with several very prominent ribs running from base to apex.

This shows the leaf of the Almondleaf Willow, Salix amygdaloides, (Keeler, 1915).

Almondleaf Willow Leaf

This shows the leaf of the Almondleaf Willow, Salix amygdaloides, (Keeler, 1915).

Buds with a single scale; fruit cone-like.

Alnus

Buds with a single scale; fruit cone-like.

The branch of an Alnus oregona, a species of alder tree.

Branch of Alnus Oregona

The branch of an Alnus oregona, a species of alder tree.

The branch of an Alnus sitchensis, a species of Alder tree.

Branch of Alnus Sitchensis

The branch of an Alnus sitchensis, a species of Alder tree.

A plant that varies in size but always has thick fleshy leaves that are spined. It also contains a juice that is used for medicinal purposes.

Aloe

A plant that varies in size but always has thick fleshy leaves that are spined. It also contains a juice…

Usually pertains to leaves. Not opposite each other but bourne singly at different levels on the stem.

Alternate

Usually pertains to leaves. Not opposite each other but bourne singly at different levels on the stem.

Flowers in stalked head-like spikes; leaves over 3.5cm long.

Alternanthera

Flowers in stalked head-like spikes; leaves over 3.5cm long.

The branch of an Amelanchier obovalis tree, native to North America.

Branch of Amelanchier Obovalis

The branch of an Amelanchier obovalis tree, native to North America.

The Leaf of the American Amber tree furnishes the Storax or Styrax, a kind of resin.

Leaf of American Amber Tree

The Leaf of the American Amber tree furnishes the Storax or Styrax, a kind of resin.

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.

Also known as Ulmus americana. The branch of the American Elm, native to eastern North America.

Branch of American Elm

Also known as Ulmus americana. The branch of the American Elm, native to eastern North America.

Leaves - simple; alternate; edge with remote, very sharp spine-like teeth, with rounded spaces between. Outline - oval. Apex and Base - pointed. Leaf - about two inches long; dark polished green above; below rather yellowish-green; thick and stiff; smooth throughout; ribs very indistinct below. Bark - light gray and smooth. Fruit - a nearly round, bright-red berry, the size of a pea. It ripens in September and continues upon the branches into the winter. Found - from Massachusetts southward near the coast to Florida, and from Southern Indiana southwest, and southward to the Gulf. General Information - The use of holly and other evergreens in religious ceremonies dates from pagan times. "Trummying of the temples with floures, boughes, and garlondes, was taken of the heathen people, whiche decked their idols and houses with suche array.: Early church councils made rules and restrictions concerning the practice - e.g., in France Christians were forbidden "to decke up their houses with lawrell, yvie, and green gouches in the Christmas season," for "Hedera est gratissima Baccho." (The ivy is most acceptable to Bacchus.)

Genus Ilex, L. (Holly)

Leaves - simple; alternate; edge with remote, very sharp spine-like teeth, with rounded spaces between.…

Also known as Carpinus caroliniana. The branch of an American Hornbeam, native to eastern North America.

Branch of American Hornbeam

Also known as Carpinus caroliniana. The branch of an American Hornbeam, native to eastern North America.

Also known as Sorbus americana. The branch of an American Mountain-Ash tree, native to northeastern North America.

Branch of American Mountain-Ash

Also known as Sorbus americana. The branch of an American Mountain-Ash tree, native to northeastern…

Also known as Liquidambar styraciflua. The branch of an American Sweetgum tree, native to eastern North America.

Branch of American Sweetgum

Also known as Liquidambar styraciflua. The branch of an American Sweetgum tree, native to eastern North…

Also known as Platanus occidentalis. The branch of an American Sycamore tree, native throughout the central and eastern parts of the United States.

Branch of American Sycamore

Also known as Platanus occidentalis. The branch of an American Sycamore tree, native throughout the…

Also known as Salix discolor. The branch of an American Willow, native throughout North America.

Branch of America Willow

Also known as Salix discolor. The branch of an American Willow, native throughout North America.

Flowers not showy, in axils of leaves, mostly purple.

Ammannia

Flowers not showy, in axils of leaves, mostly purple.

The common names of <I>Amorphophallus riviera</I> are devil's tongue and snake palm. Pictured is the flower stem and a bit of leaf from the plant. The whole flower often measures three feet long.

Amorphophallus Rivieri

The common names of Amorphophallus riviera are devil's tongue and snake palm. Pictured is the flower…

A compund leaf.

Ampelopsis

A compund leaf.

Leaves leathery, toothed only near the apex.

Ampelothamnus

Leaves leathery, toothed only near the apex.

A perennial flower with white petals and green foliage. They tend to bloom in April and May, and are found in the Western Alps.

Ranunculus Amplexicaulis

A perennial flower with white petals and green foliage. They tend to bloom in April and May, and are…

Leaves usually three in whorls (sometimes four); flowers minute and inconspicuous

Anacharis

Leaves usually three in whorls (sometimes four); flowers minute and inconspicuous

Spores borne in sacs on lower leaf surface; divisions of the leaf small, less than 2 cm long.

Anchistea

Spores borne in sacs on lower leaf surface; divisions of the leaf small, less than 2 cm long.

The image depicts the flower and portion of a leaf of the Pitcairnia andreana. The petals are yellow at the tip with red at the bottom.

Pitcairnia Andreana

The image depicts the flower and portion of a leaf of the Pitcairnia andreana. The petals are yellow…

The flower of anigozanthus flavisdus is a yellowish green color. There is also a scarlet and green flowered variety of this species. The leaves and stem are both smooth.

Anigozanthus Flavisdus Inflorerescence and Leaf

The flower of anigozanthus flavisdus is a yellowish green color. There is also a scarlet and green flowered…

The pollen-bearing portion of a stamen.

Anther

The pollen-bearing portion of a stamen.

Pictured is a young leaf, not yet showing the arched depressions, of <I>Anthurium veitchii</I>. The leaf blade are often three to four feet long. The leaves are metallic green.

Anthurium Veitchii

Pictured is a young leaf, not yet showing the arched depressions, of Anthurium veitchii. The leaf blade…

Pictured are the flower cluster and the leaf cluster of an apple tree.

Flower and Leaf Cluster of Apple

Pictured are the flower cluster and the leaf cluster of an apple tree.

"Aptandra Spruceana. 1. an expanded flower; 2. a petal; 3. tube of stamens, with 4 petaloid glands at the base; 4. pistil; 5. section of ovary." -Lindley, 1853

Aptandra

"Aptandra Spruceana. 1. an expanded flower; 2. a petal; 3. tube of stamens, with 4 petaloid glands at…

Pictured are radical leaves of aquilegia canadensis, common name common columbine. The leaves are one to two inches and have three divisions.

Radical Leaves of Aquilegia Canadensis

Pictured are radical leaves of aquilegia canadensis, common name common columbine. The leaves are one…

A genus of the plant family Araliaceae, consisting of about 30 species of deciduous and evergreen trees and shrubs.

Aralia

A genus of the plant family Araliaceae, consisting of about 30 species of deciduous and evergreen trees…

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.

The common name of <I>Araucaria imbricata</I> is monkey puzzle. The leaves overlap. The leaves are very stiff, leathery, and sharp pointed.

Araucaria Imbricata

The common name of Araucaria imbricata is monkey puzzle. The leaves overlap. The leaves are very stiff,…

The leafy branchlets of <I>Araucaria rulei</I> are very long. The leaves are oval and concave. The leaves are very gray on the upper side and a rich glossy green on the lower side.

Araucaria Rulei

The leafy branchlets of Araucaria rulei are very long. The leaves are oval and concave. The leaves are…