Ilex aquifolium ferox is a green leaved variety of holly. The common name is hedgehog holly. The leaves are two inches long with strongly developed marginal spines.

Leaf of Ilex Aquifolium Ferox

Ilex aquifolium ferox is a green leaved variety of holly. The common name is hedgehog holly. The leaves…

Ilex aquifolium hendersoni is a green leaved variety of holly. The leaves are dark green with sunken veins.

Leaf of Ilex Aquifolium Hendersoni

Ilex aquifolium hendersoni is a green leaved variety of holly. The leaves are dark green with sunken…

Ilex aquifolium ovata is a green leaved variety of holly. The leaves are about two and a half inches long. The leaves have scarce, spiny teeth.

Leaf of Ilex Aquifolium Ovata

Ilex aquifolium ovata is a green leaved variety of holly. The leaves are about two and a half inches…

Ilex aquifolium pyramidalis is a green leaved variety of holly. The leaves are dark green. The leaves have six or eight spines on the same plane as the leaf.

Leaf of Ilex Aquifolium Pyramidalis

Ilex aquifolium pyramidalis is a green leaved variety of holly. The leaves are dark green. The leaves…

Ilex aquifolim tortuosa is a green leaved variety of holly. The leaves are about two inches long and one inch broad. The blade is sprially twisted once.

Leaf of Ilex Aquifolium Tortuosa

Ilex aquifolim tortuosa is a green leaved variety of holly. The leaves are about two inches long and…

Ilex aquifolium argentea medio-picta is a green leaved variety of holly. The leaves are dark green at the edge with a large, central blotch of creamy white. The leave have strong spines.

Leaf of Ilex Aquifolium Argentea Medio-Picta

Ilex aquifolium argentea medio-picta is a green leaved variety of holly. The leaves are dark green at…

Impari-pinnate leaves are pinnate leaves having a terminal or odd leaflet.

Impari-Pinnate Leaf

Impari-pinnate leaves are pinnate leaves having a terminal or odd leaflet.

Larvae of butterflies, moths, and sawflies are called caterpillars.

Larvae of a Rose Leaf Sawfly

Larvae of butterflies, moths, and sawflies are called caterpillars.

The leaves are deeply seven parted.

Leaf of Ipomoea Sinuata

The leaves are deeply seven parted.

This variety has deep vinous red stems, leafstalks, and principal veins. The leaves are green blotched with gold.

Habit and Detached Portion of Inflorescence with Leaf of Iresine Herbstii Auero-Reticulata

This variety has deep vinous red stems, leafstalks, and principal veins. The leaves are green blotched…

Juglans regia elongata only differs from the common walnut tree in that the fruit of tree is very elongated.

Leaf and Nut of Juglans Regia Elongata

Juglans regia elongata only differs from the common walnut tree in that the fruit of tree is very elongated.

The leaves of kaempferia gilbertii are tufted and deep green. The leaves are bordered by a band of white. The leaves have an oblong shape and taper to a point.

Kaempferia Gilbertii

The leaves of kaempferia gilbertii are tufted and deep green. The leaves are bordered by a band of white.…

The flowers of koelreuteria paniculata are yellow. There are many flowers on each branch. The leaves are deeply toothed.

Leaf and Portion of Inflorescence of Koelreuteria Paniculata

The flowers of koelreuteria paniculata are yellow. There are many flowers on each branch. The leaves…

Lanceolate leaves are lance or spear shaped. These leaves are narrowly elliptical, tapering to each end.

Lanceolate Leaf

Lanceolate leaves are lance or spear shaped. These leaves are narrowly elliptical, tapering to each…

Leontice altaica flowers are about twelve per plant. The flowers bloom in April. The plant grows between three and six inches tall.

Habit, Detached Leaf, and Portion of Inflorescence of Leontice Altaica

Leontice altaica flowers are about twelve per plant. The flowers bloom in April. The plant grows between…

The flowers are lietzia brasiliensis are green, richly mottled with brown. The leaves are hairy and taper at both ends.

Habit, Detached Leaf, Flower, and Capsule of Lietzia Brasiliensis

The flowers are lietzia brasiliensis are green, richly mottled with brown. The leaves are hairy and…

Ligustrum lucidum flowers are white and grow in much spreading panicles. The plant grows between eight and twelve feet tall.

Leaf and Portion of Panicle of Ligustrum Lucidum

Ligustrum lucidum flowers are white and grow in much spreading panicles. The plant grows between eight…

Pictured are a portion of the inflorescence, a detached flower, and a leaf of linaria triornithophora. The flowers are purple with a yellow palate. The flowers bloom June to September.

Linaria Triornithophora

Pictured are a portion of the inflorescence, a detached flower, and a leaf of linaria triornithophora.…

The linear-acute leaf is narrow with two sides that are nearly parallel.

Linear-Acute Leaf

The linear-acute leaf is narrow with two sides that are nearly parallel.

Pictured are the habit, a detached flower head, a leaf, and a single floret of lonas inodora. The flowers are small and yellow. The flowers bloom July to October.

Lonas Inodora

Pictured are the habit, a detached flower head, a leaf, and a single floret of lonas inodora. The flowers…

The flowers of maurandya scandens are purplish violet. The leaves are heart shaped and deeply serrated.

Flowering Branch, Detached Flower, and Leaf of Maurandya Scandens

The flowers of maurandya scandens are purplish violet. The leaves are heart shaped and deeply serrated.

The pseudo-bulbs of maxillaria venusta are two leaved. The flowers are a waxy white. The lip of the flower is faintly stained with yellow and blotched with crimson. The leaves are linear, oblong, and a light shining green color.

Pseudo-Bulb, Leaf, and Flower of Maxillaria Venusta

The pseudo-bulbs of maxillaria venusta are two leaved. The flowers are a waxy white. The lip of the…

The common name of melianthus is honey flower. The flowers are green at the base. The petals and sepals are orange yellow within and a large red spot marked on the outside.

Flowers and Leaf of Melianthus Comosus

The common name of melianthus is honey flower. The flowers are green at the base. The petals and sepals…

The flowers of mesembryanthemum acinaciforme are large and reddish. The flowers grow alone at the ends of the stems. The flowers bloom in August.

Branch and Detached Leaf of Mesembryanthemum Acinaciforme

The flowers of mesembryanthemum acinaciforme are large and reddish. The flowers grow alone at the ends…

The common name of mimosa pudica is humble plant. The flowers are red and bloom in summer. The stem is very prickly. The plant grows one foot tall.

Flowering Branch, Single Flower Head, and Leaf of Mimosa Pudica

The common name of mimosa pudica is humble plant. The flowers are red and bloom in summer. The stem…

Pictured is the upper portion of the plant, a radical leaf, and a flower of moricandia sonchifolia. The flowers are a pale, violet blue. The flowers are one inch in diameter and bloom in March.

Moricandia Sonchifolia

Pictured is the upper portion of the plant, a radical leaf, and a flower of moricandia sonchifolia.…

The codlin moth belongs to the tortricina, or leaf roller moths. The moths are very small.

Codlin Moth

The codlin moth belongs to the tortricina, or leaf roller moths. The moths are very small.

The common name of narcissus jonquilla is jonquil. The flowers are bright yellow and very fragrant.

Habit, Detached Flower, and Portion of Leaf of Narcissus Jonquilla

The common name of narcissus jonquilla is jonquil. The flowers are bright yellow and very fragrant.

The common name of narcissus tazetta is polyanthus narcissus. The flowers are fragrant and about one inch across when expanded. The flowers bloom in March.

Inflorescence and Portion of Leaf of Narcissus Tazetta

The common name of narcissus tazetta is polyanthus narcissus. The flowers are fragrant and about one…

Pitcher plant is the common name of nepenthes. The madagascariensis variety has a crimson pitcher. The pitcher is a little over two inches long.

Leaf and Pitcher of Nepenthes Madagascariensis

Pitcher plant is the common name of nepenthes. The madagascariensis variety has a crimson pitcher. The…

The common name of nepenthes is pitcher plant. The northiana variety has purple spotted pitchers. The pitchers are nearly one foot long.

Leaf and Pitcher of Nepenthes Northiana

The common name of nepenthes is pitcher plant. The northiana variety has purple spotted pitchers. The…

Nigella has many common names including devil-in-the-bush, fennel flower, and love-in-a-mist. The sativa variety has bluish flowers that bloom in July. The plant grows one and a half feet tall.

Flower Stem with Leaf of Nigella Sativa

Nigella has many common names including devil-in-the-bush, fennel flower, and love-in-a-mist. The sativa…

Pictured are oak spangle galls. The galls are on a lower surface of a leaf, removed from a leaf, the flat section, and transverse sections. Also pictured are currant galls of oak.

Oak Galls

Pictured are oak spangle galls. The galls are on a lower surface of a leaf, removed from a leaf, the…

A pictures galls on the lower surface of an oak leaf. B picture galls on a young twig.

Oak Galls

A pictures galls on the lower surface of an oak leaf. B picture galls on a young twig.

An obcordate leaf is inversely cordate.

Obcordate and Retuse Leaf

An obcordate leaf is inversely cordate.

An obovate leaf is inversely egg shaped with the broadest end uppermost.

Obovate Leaf

An obovate leaf is inversely egg shaped with the broadest end uppermost.

The common name of oenthera is evening primrose. The acaulis variety has white flowers fading into red. The flowers bloom May to September. The plant grows six inches high.

Habit and Detached Leaf and Flower of Oenothera Acaulis

The common name of oenthera is evening primrose. The acaulis variety has white flowers fading into red.…

Pictured is a tip of a flowering branch and the leaf of oreopanax epremesnilianum. There are seven to nine leaflets.

Oreopanax Epremesnillianum

Pictured is a tip of a flowering branch and the leaf of oreopanax epremesnilianum. There are seven to…

An ovate leaf is the shape of an egg. The broad end is downwards.

Ovate and Obtuse Leaf

An ovate leaf is the shape of an egg. The broad end is downwards.

Livistona australis is a variety of palm tree. The leaves spread out like the ribs of a fan through the leaf blade.

Livistona Australis

Livistona australis is a variety of palm tree. The leaves spread out like the ribs of a fan through…

A palmatifid leaf is cut half way to the base in a palmate manner.

Palmatifid Leaf

A palmatifid leaf is cut half way to the base in a palmate manner.

Pandurate leaves are fiddle shaped. The leaves arer obovate in form, with one or two deep recesses or indentations on each side.

Pandurate Leaf

Pandurate leaves are fiddle shaped. The leaves arer obovate in form, with one or two deep recesses or…

Pardanthus chinensis flowers are nearly two inches across and are orange colored spotted with purple-brown. The stem is erect and leafy.

Inflorescence and Leaf of Pardanthus Chinensis

Pardanthus chinensis flowers are nearly two inches across and are orange colored spotted with purple-brown.…

The common names of passiflora are passion flower and passion fruit. The racemosa variety has deep red or scarlet flowers. The flowers bloom March to October.

Leaf and Inflorescence of Passiflora Racemosa

The common names of passiflora are passion flower and passion fruit. The racemosa variety has deep red…

The common names of pavia are buckeye and smooth-fruited horse chestnut. The californica variety has white or pale rose flowers. The flowers are very fragrant and cover the dense head of the tree. Pictured is the flowering branch, detached leaf, flower, and young fruit of pavia californica.

Pavia Californica

The common names of pavia are buckeye and smooth-fruited horse chestnut. The californica variety has…

Pictured is a leaf with a male on it, slightly enlarge (a) and a male flying, much enlarged (b). Lecanium persicae is known as the peach scale insect. It lives on the branches of peach and plum trees.

Lecanium Persicae

Pictured is a leaf with a male on it, slightly enlarge (a) and a male flying, much enlarged (b). Lecanium…

Pictured are pear leaves attacked by phytoptus pyris, also known as gall mites. A represents a leaf recently attacked by mites. B represents a leaf with old mite galls.

Pear Leaf Attacked by Phytoptus Pyris

Pictured are pear leaves attacked by phytoptus pyris, also known as gall mites. A represents a leaf…

In the middle of the blister, on its lower surface, is a small opening, which permits the gall mites (phytoptus pyris) to pass out of the blister. The cells in the middle of the leaf are torn apart.

Blister Formed by Phytoptus Pyris by Leaf

In the middle of the blister, on its lower surface, is a small opening, which permits the gall mites…

Pedate leaves resemble a bird's foot. The leaves are palmately divided or parted with the lateral divisons cleft into smalled segments.

Pedate Leaf

Pedate leaves resemble a bird's foot. The leaves are palmately divided or parted with the lateral divisons…

The two upper petals of pelargonium tricolor flowers are very dark red and the three lower petals are white. Each stem is one to three flowered. The stem is shrubby, short, and branching.

Inflorescence and Leaf of Pelargonium Tricolor

The two upper petals of pelargonium tricolor flowers are very dark red and the three lower petals are…

Peltate leaves are target shaped or shield like. Pictured is a peltate leaf of Indian cress.

Peltate Leaf of Indian Cress

Peltate leaves are target shaped or shield like. Pictured is a peltate leaf of Indian cress.

The common name of persica is peach. The davidiana variety and small fruit that are yellow when mature. The margins of the leaves are finely serrated.

Fruiting Branch, Leaf, and Stone of Persica Davidiana

The common name of persica is peach. The davidiana variety and small fruit that are yellow when mature.…

The leaves of philodendron verucosum are heart shaped and a delicate, satiny green. The leaves are shaded with a metallic olive color on the upper surface.

Branch and Detached Leaf of Philodendron Verucosum

The leaves of philodendron verucosum are heart shaped and a delicate, satiny green. The leaves are shaded…

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…

Pinnate leaflets are arranged along each side of a common petiole.

Pinnate Leaf of Jasmine

Pinnate leaflets are arranged along each side of a common petiole.

A pinnatifid leaf is divided into lobes from the margin nearly to the axis.

Pinnatifid Leaf

A pinnatifid leaf is divided into lobes from the margin nearly to the axis.

Pinus is a genus of hardy, evergreen trees. Pictured are the strengthening cells (1), ducts surronded by strengthening cells (2), wavy chlorophylla bearing cells (3), bundle sheath (4), fibro-vascular bundle (5), stomata (6), and internal duct (7).

Transverse Section of Pinus Excelsa Leaf

Pinus is a genus of hardy, evergreen trees. Pictured are the strengthening cells (1), ducts surronded…

Shown are the strengthening cells (1), ducts (2), wavy, chlorophyll bearing cells (3), bundle sheath (4), fibro-vascular bundles (5), and stomata (6).

Transverse Section of Pinus Sylvestris Leaf

Shown are the strengthening cells (1), ducts (2), wavy, chlorophyll bearing cells (3), bundle sheath…

Pictured are (1) strengthening cells, (2), internal ducts, (3) chlorophyll bearing cells, (4) bundle sheath, (5) fibro-vascular bundles, and (6) stomata of the pinus coulteri leaf.

Transverse Section of Pinus Coulteri Leaf

Pictured are (1) strengthening cells, (2), internal ducts, (3) chlorophyll bearing cells, (4) bundle…

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.