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.

The common names of <i>Adlumia fungus</i> are climbing fumitory, mountain fringe, and allegheny vine. The vine climbs by the slender young leaf stalks.

Adlumia Fungosa

The common names of Adlumia fungus are climbing fumitory, mountain fringe, and allegheny vine. The vine…

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.…

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…

The leaf blades of </I>Anthurium andraeanum</I> are drooping. The flower spike is three to four inches long and yellowish with a white band.

Anthurium Andraeanum

The leaf blades of Anthurium andraeanum are drooping. The flower spike is three to four inches long…

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.

The fruit buds of the apricot are borne beside the leaf-bud and also on spurs. This is similar to the peach.

Fruit Buds of the Apricot

The fruit buds of the apricot are borne beside the leaf-bud and also on spurs. This is similar to the…

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…

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…

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,…

Illustrated is injury to a leaf by a small sized, leaf eating caterpillar.

Leaf Eaten by Caterpillar

Illustrated is injury to a leaf by a small sized, leaf eating caterpillar.

Illustrated is an injury to leaves by a large sized, leaf eating caterpillar.

Leaves Eaten by Caterpillar

Illustrated is an injury to leaves by a large sized, leaf eating caterpillar.

The larvae of leaf-miners eat out the tissue of the leaves of elm between the lateral veins. This leaves the leaves with a seared appearance in spots.

Leaf-Miners' Galleries in Elm

The larvae of leaf-miners eat out the tissue of the leaves of elm between the lateral veins. This leaves…

The tarspot disease of maple is caused by rhytisma acerinum. The diseased spots appear as blotches of tar on the upper surface of leaves.

Maple Leaf with Tarspot Fungus

The tarspot disease of maple is caused by rhytisma acerinum. The diseased spots appear as blotches of…

The tenuissimus variety of <I>Asparagus plumosus</I> is a wiry stemmed variety with fewer leaf-like branches. The plant has a distinct blue-green color.

Tenuissimus Variety of Asparagus Plumosus

The tenuissimus variety of Asparagus plumosus is a wiry stemmed variety with fewer leaf-like branches.…

The leaves of <I>Atalantia citrioides</I> are two to three and a half inches long and oval shaped.

Leaf of Atalantia Citrioides

The leaves of Atalantia citrioides are two to three and a half inches long and oval shaped.

Pictured are young plants starting from incisions on a begonia leaf.

Begonia Leaf

Pictured are young plants starting from incisions on a begonia leaf.

Illustrated is a triangular leaf cutting of begonia.

Leaf Cutting

Illustrated is a triangular leaf cutting of begonia.

Pictured is a plant arising from the base, or tip, of a triangular leaf cutting of begonia.

Plant Arising from Begonia

Pictured is a plant arising from the base, or tip, of a triangular leaf cutting of begonia.

Illustrated is a section of cabbage head. It shows the thickened rachis and leaf stalks. It also shows the buds in the axils.

Section of Cabbage Head

Illustrated is a section of cabbage head. It shows the thickened rachis and leaf stalks. It also shows…

The pereskia fruit is apple shaped and bears a number of leaf-like bracts on the skin.

Pereskia Fruit

The pereskia fruit is apple shaped and bears a number of leaf-like bracts on the skin.

Illustrated is a spiny leaf of carduus arvensis or cirsium arvense. It is also known as Canada thistle.

Carduus Arvensis

Illustrated is a spiny leaf of carduus arvensis or cirsium arvense. It is also known as Canada thistle.

The section of carnation shows the leaf anthers. One is in the process of doubling.

Carnation Section

The section of carnation shows the leaf anthers. One is in the process of doubling.

Illustrated is the leaf of castanea dentata, a variety of chestnut. The leaf is oblong and tapers to a point. It is coarsely serrated.

Castanea Dentata

Illustrated is the leaf of castanea dentata, a variety of chestnut. The leaf is oblong and tapers to…

Illustrated is the leaf of castanea sativa, a variety of chestnut. The leaves are oblong and taper to a point. The leaves are rounded at the base.

Castanea Sativa

Illustrated is the leaf of castanea sativa, a variety of chestnut. The leaves are oblong and taper to…

Illustrated are leaflets of cedrela and ailanthus. The credrela leaflet is on the right.

Cedrela and Ailanthus Leaflets

Illustrated are leaflets of cedrela and ailanthus. The credrela leaflet is on the right.

Illustrated is a lower leaf from a young plant of centaurea cineraria.

Centaurea Cineraria

Illustrated is a lower leaf from a young plant of centaurea cineraria.

Illustrated is a radical leaf of centaurea gymnocarpa.

Centaurea Gymnocarpa

Illustrated is a radical leaf of centaurea gymnocarpa.

Ceratozamia mexicana has a thick, short trunk covered with the remains of fallen leaf stalks. The leaves are a rich, dark green

Ceratozamia Mexicana

Ceratozamia mexicana has a thick, short trunk covered with the remains of fallen leaf stalks. The leaves…

The leaf blades of ceropteris triangularis are two to five inches long and wide. The stalks are six to twelve inches long.

Ceropteris Triangularis

The leaf blades of ceropteris triangularis are two to five inches long and wide. The stalks are six…

The common name of chamaedaphne is leather leaf. The calyculata variety is a bush with spreading or horizontal branches. The flowers of the plant are nodding and white.

Chamaedaphne Calyculata

The common name of chamaedaphne is leather leaf. The calyculata variety is a bush with spreading or…

The leaves of grapefruit are large and dark, glossy green above. The shape is oval or elliptic oval.

Grapefruit Leaf

The leaves of grapefruit are large and dark, glossy green above. The shape is oval or elliptic oval.

Pictured is the leaf or sour or seville orange. The leaves are light green when young and three to four inches long.

Sour Orange Leaf

Pictured is the leaf or sour or seville orange. The leaves are light green when young and three to four…

The leaves of citrus ichangensis are narrow with broadly winged stalks.

Citrus Ichangensis

The leaves of citrus ichangensis are narrow with broadly winged stalks.

Illustrated is a normal leaf of cobaea scandens. The terminal leaflet is represented by a tendril.

Normal Leaf of Cobaea Scandens

Illustrated is a normal leaf of cobaea scandens. The terminal leaflet is represented by a tendril.

Illustrated is a monstrous or abnormal leaf of cobaea.

Abnormal Leaf of Cobaea

Illustrated is a monstrous or abnormal leaf of cobaea.

The branches of cuphea ignea are somewhat angled. The flowers stalks are two to four times long than the leaf stalks. The plant is native to Mexico.

Cuphea Ignea

The branches of cuphea ignea are somewhat angled. The flowers stalks are two to four times long than…

Pictured is a leaf cutting of gloxinia.

Leaf Cutting

Pictured is a leaf cutting of gloxinia.

Illustrated is the leaf of sago palm, or cycas revoluta. The leaves are long and recurved. The leaves grow two to seven feet long.

Sago Palm leaf

Illustrated is the leaf of sago palm, or cycas revoluta. The leaves are long and recurved. The leaves…

Illustrated is the tip of a leaf of dennstaedtia punctilobula. The leaves are one to two and a half feet long. The leaves are light green.

Dennstaedtia Punctiolbula

Illustrated is the tip of a leaf of dennstaedtia punctilobula. The leaves are one to two and a half…

Illustrated is the leaf of squirrel corn, the common name of dicentra canadensis. The leaves are finely cut with linear and abruptly pointed segments.

Squirrel Corn Leaf

Illustrated is the leaf of squirrel corn, the common name of dicentra canadensis. The leaves are finely…

A floral divider with birds and large leaves.

Floral Divider

A floral divider with birds and large leaves.

Illustrated are the effects of leaf-curl fungus on peach foliage.

Peach Foliage

Illustrated are the effects of leaf-curl fungus on peach foliage.

Illustrated is currant foliage attacked by the leaf-spot fungus.

Currant Foliage

Illustrated is currant foliage attacked by the leaf-spot fungus.

Illustrated is a disease of cucumber leaf. The dying margin shows that the trouble is due to some interference with food supply.

Cucumber Leaf

Illustrated is a disease of cucumber leaf. The dying margin shows that the trouble is due to some interference…

Illustrated is a strawberry leaf rolled up from the attack of mildew.

Strawberry Leaf

Illustrated is a strawberry leaf rolled up from the attack of mildew.

Illustrated is tip burn of the potato leaf. It is a physiological difficulty or disease.

Potato Leaf

Illustrated is tip burn of the potato leaf. It is a physiological difficulty or disease.

Illustrated are nymphs of the four-lined leaf bug and the adult of the tarnished plant bug. The small bug on the left is a recently hatched nymph.

Leaf Bug and Plant Bug

Illustrated are nymphs of the four-lined leaf bug and the adult of the tarnished plant bug. The small…

The cocoon of the promethea moth is made in the roll of a leaf. The insect weaves a web around the leaf stalk and ties it to the parent stem. That way the leaf cannot fall.

Promethea Moth Cocoon

The cocoon of the promethea moth is made in the roll of a leaf. The insect weaves a web around the leaf…

Illustrated is a leaf of spinage dock. The crisp leaves appear in early April.

Spinage Dock

Illustrated is a leaf of spinage dock. The crisp leaves appear in early April.

Illustrated is a leaf of belleville dock. It is a European and North American plant. It is really a sorrel.

Belleville Dock

Illustrated is a leaf of belleville dock. It is a European and North American plant. It is really a…

Amazon lily is the common name of the eucharis plant. Pictured is the leaf of E. grandiflora and the flowers of (a) E. subedentat, (b) E. sanderi, (c) E. grandiflora, and (d) E. candida.

Amazon Lily

Amazon lily is the common name of the eucharis plant. Pictured is the leaf of E. grandiflora and the…

Poinsettia is also known as Christmas or Easter flower. It is native to moist, shaded areas of tropical Mexico and central America.

Poinsettia

Poinsettia is also known as Christmas or Easter flower. It is native to moist, shaded areas of tropical…

Mexican fire plant is the common name of euphorbia heterophylla. It is native in a range from the eastern and central United States to Peru. The leaves are dark green, with some bright red at the base.

Mexican Fire Plant

Mexican fire plant is the common name of euphorbia heterophylla. It is native in a range from the eastern…

Livistona humilis is native to north Australia. The stems are four to sixteen feet high. The leaf stalk has both small and large prickles.

Livistona Humilis

Livistona humilis is native to north Australia. The stems are four to sixteen feet high. The leaf stalk…

Illustrated is a leaf of <i>melia azedarach</i>. The common names are China tree, China berry, and pride of India. The leaves are three feet long and stalked.

China Tree Leaf

Illustrated is a leaf of melia azedarach. The common names are China tree, China berry, and pride of…

Illustrated is the leaf of the common moonseed,  <i>menispermum canadense</i>. The leaves vary in shape. Some are round/oval, others are heart shaped.

Moonseed Leaf

Illustrated is the leaf of the common moonseed, menispermum canadense. The leaves vary in shape. Some…

Illustrated are the leaves of <i>morus alba</i> (b) and <i>morus multicaulis</i> (a). Both are varieties of mulberry.

Mulberry Leaf

Illustrated are the leaves of morus alba (b) and morus multicaulis (a). Both are varieties of mulberry.