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Narcissus tazetta intermedius flowers are lemon yellow. Each scape has one to five flowers.

Narcissus Tazetta Intermedius

Narcissus tazetta intermedius flowers are lemon yellow. Each scape has one to five flowers.

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…

Narcissus triandrus flowers and are about nine to ten inches long. The flowers are pure white and bloom in April.

Narcissus Triandrus

Narcissus triandrus flowers and are about nine to ten inches long. The flowers are pure white and bloom…

"Flower of Tropaeolum majus showing the spur." -Lindley, 1853

Garden Nasturtium

"Flower of Tropaeolum majus showing the spur." -Lindley, 1853

"Nelumbium is the typical and only genus of the order Nelumbiaceæ. The species are remarkable for the beauty of their flowers. N. speciosum has magnificent flowers, magenta or white. It does not now grow in Egypt, but is found in India. The rhizome, stalks, and seeds are eaten by the Hindus. A fiber derived from the stalk is used as a wick for lamps in Hindu temples, the plant being considered sacred. The North American Indians eat the rhizomes of N. luteum."—(Charles Leonard-Stuart, 1911)

Nelumbium

"Nelumbium is the typical and only genus of the order Nelumbiaceæ. The species are remarkable…

Enlarged and top-shaped receptacle of Nelumbium, at maturity.

Nelumbium

Enlarged and top-shaped receptacle of Nelumbium, at maturity.

Nelumbium is known as the sacred or water bean. The luteum variety has yellow, fragrant flowers. The flowers resemble a double tulip.

Nelumbium Luteum

Nelumbium is known as the sacred or water bean. The luteum variety has yellow, fragrant flowers. The…

Fruit of Nelumbo, (Gray, 1858).

Nelumbo

Fruit of Nelumbo, (Gray, 1858).

Nemophila insignis flowers are sky blue with a white eye. The flowers bloom in spring and summer.

Nemophila Insignis

Nemophila insignis flowers are sky blue with a white eye. The flowers bloom in spring and summer.

Nemophila maculata flowers are white with a violet purple blotch on each lobe of the large corolla. The flowers bloom in summer.

Flowering Branch and Detached Branchlet of Nemophila Maculata

Nemophila maculata flowers are white with a violet purple blotch on each lobe of the large corolla.…

The flowers of nepenthes rafflesiana are yellow and brown. The pitchers are greenish yellow with brown markings.

Nepenthes Rafflesiana

The flowers of nepenthes rafflesiana are yellow and brown. The pitchers are greenish yellow with brown…

Nerine undulata flowers are flesh colored with wavy outlines. The scape is one foot high and has many flowers.

Inflorescence of Nerine Undulata

Nerine undulata flowers are flesh colored with wavy outlines. The scape is one foot high and has many…

Nerium oleander album plenum is a variety of oleander. The flowers are large and white.

Flowering Branchlet of Nerium Oleander Album Plenum

Nerium oleander album plenum is a variety of oleander. The flowers are large and white.

"Branch of Procris splendens; 2. cluster of male and female flowers; 3. a male flower about to expand; 4. the same expanded." -Lindley, 1853

Nettlewort

"Branch of Procris splendens; 2. cluster of male and female flowers; 3. a male flower about to expand;…

Compound flower anatomy. 13, neuter floret.

Neuter Floret

Compound flower anatomy. 13, neuter floret.

Nicotiana acutiflora is a variety of tobacco. The flowers are pure white. The flowers bloom from June until frost.

Plant and Detached Flower of Nicotiana Acutiflora

Nicotiana acutiflora is a variety of tobacco. The flowers are pure white. The flowers bloom from June…

Nicotiana suaveolens is a sweet scented variety of tobacco. The flowers are white and fragrant. The flowers bloom in summer. The plant grows between one and two feet tall.

Flowers of Nicotiana Suaveolens

Nicotiana suaveolens is a sweet scented variety of tobacco. The flowers are white and fragrant. The…

Common tobacco is the common name of nicotiana tabacum. The flowers are rose colored and downy on the outside. The flowers bloom in the summer.

Portion of Inflorescence of Nicotiana Tabacum

Common tobacco is the common name of nicotiana tabacum. The flowers are rose colored and downy on the…

Nictotiana wigandioides is a variety of tobacco. This variety is a greenhouse shrub. The flowers are yellowish white.

Nicotiana Wigandioides

Nictotiana wigandioides is a variety of tobacco. This variety is a greenhouse shrub. The flowers are…

Nigella has many common names including devil-in-the-bush, fennel flower, and love-in-a-mist. The damascena variety has white or blue flowers with bright green leaves. Flore-pleno is the double flowered variety.

Habit and Detached Flowering Branchlet of Nigella Damascena Flore-Pleno

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

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…

The nightshade or bittersweet (Solanum Dulcamara).

Nightshade

The nightshade or bittersweet (Solanum Dulcamara).

The corolla of the nolana paradoxa flower is funnel shaped. The flowers bloom in summer. This plant is native to Chili.

Flowering Branchlet of Nolana Paradoxa

The corolla of the nolana paradoxa flower is funnel shaped. The flowers bloom in summer. This plant…

Nothoscordum fragrans flowers are white with a bar of very pale lilac on the outer side of each division. The flowers are very fragrant.

Habit and Detached Single Flower of Nothoscordum Fragrans

Nothoscordum fragrans flowers are white with a bar of very pale lilac on the outer side of each division.…

"A Nurse for the Sick Room." — Blaisedell, 1904

Nurse

"A Nurse for the Sick Room." — Blaisedell, 1904

"Myristica fragrans. 1. a flower; 2. a column of stamens; 3. a section of a female showing the ovary and ovule; 4. a section of a nutmeg with the embryo at the base of the albumen." -Lindley, 1853

Nutmeg

"Myristica fragrans. 1. a flower; 2. a column of stamens; 3. a section of a female showing the ovary…

Pictured are the orders of Nyctanginaceae, Phytolaccaceae, Aizoaceae, and Portulacaceae. Flowers of those orders include: (1) mirabilis, (2) neea, (3) phytolacca, (4) molluga, (5) aizoon, (6) mesembryanthemum, and (7) calandrinia.

Nyctanginaceae, Phytolaccaceae, Aizoaceae, and Portulacaceae

Pictured are the orders of Nyctanginaceae, Phytolaccaceae, Aizoaceae, and Portulacaceae. Flowers of…

Nymphaea lotus is a synonym of nymphaea thermalis. The common name is Hungarian lotus. The flowers are pure white and bloom during the summer.

Abnormal Inflorescence of Nymphaea Lotus

Nymphaea lotus is a synonym of nymphaea thermalis. The common name is Hungarian lotus. The flowers are…

Nymphaeaceae is an order of aquatic herbs including the water lily family. This order has eight genera and about sixty species. Pictured are various flowers belonging to the order.

Order of Nymphaeaceae

Nymphaeaceae is an order of aquatic herbs including the water lily family. This order has eight genera…

Also known as Quercus cerris. A greenish-white tree with a dark gray bark. The flower produced is a cylindrical cluster of yellow flowers, which are usually wind-pollinated. The fruit is a large acorn, which is bicoloured with an orange bottom half grading to a green-brown tip.

Turkey Oak

Also known as Quercus cerris. A greenish-white tree with a dark gray bark. The flower produced is a…

Pictured are flowers from the order of ochnaceae. The flowers pictured are (1) ochna, (2) gordonia, and (3) thea.

Order of Ochnaceae

Pictured are flowers from the order of ochnaceae. The flowers pictured are (1) ochna, (2) gordonia,…

"Flowering Plant of Shortia galacifolia. a, the corolla, laid open." -Whitney, 1911

Oconee Bells

"Flowering Plant of Shortia galacifolia. a, the corolla, laid open." -Whitney, 1911

Odontoglossum cervantesii flowers are one to two inches across. The flowers are rosy lilac barred at the base with crimson brown. Each spike is six inches high with three to five flowers.

Flower of Odontoglossum Cerbantesii

Odontoglossum cervantesii flowers are one to two inches across. The flowers are rosy lilac barred at…

Odontoglossum cirrhosum flowers are milk whitet with deep purplish violet dark spots on the sepals and petals. The sepals are lance shaped and end in bristles.

Odontoglossum Cirrhosum

Odontoglossum cirrhosum flowers are milk whitet with deep purplish violet dark spots on the sepals and…

Odontoglossum crispum flowers have pure white sepals and petals and a yellow lip. The lip is spotted towards the front with blotches of reddish brown.

Odontoglossum Crispum

Odontoglossum crispum flowers have pure white sepals and petals and a yellow lip. The lip is spotted…

Odontoglossum hallii flowers are pale yellow with large, chocolate brown patches. The flowers are about four inches across.

Flower of Odontoglossum Hallii

Odontoglossum hallii flowers are pale yellow with large, chocolate brown patches. The flowers are about…

Odontoglossum rossii flowers are one to two inches across. The petals are pure white with a few spots at their base. The scapes have two to five flowers. The flowers bloom in winter.

Habit and Detached Single Flower of Odontoglossum Rossii

Odontoglossum rossii flowers are one to two inches across. The petals are pure white with a few spots…

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.…

Oenothera amoena rubicunda is a variety of evening primrose with rose flowers with four crimson spots. The flowers bloom in summer.

Flowering Branch of Oenothera Amoena Rubicunda

Oenothera amoena rubicunda is a variety of evening primrose with rose flowers with four crimson spots.…

The common name of oenothera biennis is common evening primrose. The lamarckiana variety has larger and finer flowers.

Oenothera Biennis Lamarckiana

The common name of oenothera biennis is common evening primrose. The lamarckiana variety has larger…

Oenothera exima is a variety of evening primrose with white flowers that are four inches in diameter. The flowers bloom in July.

Oenothera Exima

Oenothera exima is a variety of evening primrose with white flowers that are four inches in diameter.…

Oenthera Lady Albemarle has distinct, showy crimson flowers. It is a dwarf variety.

Oenothera Lady Albemarle

Oenthera Lady Albemarle has distinct, showy crimson flowers. It is a dwarf variety.

Oenothera missouriensis latifolia flowers are large and yellow. The leaves are broad.

Oenothera Missouriensis Latifolia

Oenothera missouriensis latifolia flowers are large and yellow. The leaves are broad.

Oenothera speciosa is a variety of evening primrose with white flowers that become reddish as they fade. The flowers bloom March to September.

Flowering Branch of Oenothera Speciosa

Oenothera speciosa is a variety of evening primrose with white flowers that become reddish as they fade.…

A pink flower that typically blooms in the Spring. The plant has been used for centuries as a medicinal herb, and the leaves are commonly eaten by caterpillars. They reach up to 1 foot in height.

Pulmonaris Officinalis

A pink flower that typically blooms in the Spring. The plant has been used for centuries as a medicinal…

Pictured are the flowers and fruits of the orders oleaceae, loganiaceae, gentianaceae, and apocynaceae. The flowers and fruits illustrated are (1) olea, (2) fraxinus, (3) logania, (4) gentiana, (5) apocynum, and (6) vinca.

Orders of Oleaceae, Loganiaceae, Gentianaceae, and Apocynaceae

Pictured are the flowers and fruits of the orders oleaceae, loganiaceae, gentianaceae, and apocynaceae.…

Olearia gunnia flowers are white and bloom in September. The branches are hoary. Pictured is a flowering branch, branchlet, and flower head of olearia gunnia.

Olearia Gunniana

Olearia gunnia flowers are white and bloom in September. The branches are hoary. Pictured is a flowering…

Omphalodes verna flowers are blue with a white throat. The flowers bloom March to May. The plant grows six inches tall.

Omphalodes Verna

Omphalodes verna flowers are blue with a white throat. The flowers bloom March to May. The plant grows…

Pictured are flowers from the orders onagraceae and haloragidaceae. The flowers of these orders that are illustrated are (1) oenothera, (2) epilobium, (3) circaea, and (4) myriophyllum.

Orders of Onagraceae and Haloragidaceae

Pictured are flowers from the orders onagraceae and haloragidaceae. The flowers of these orders that…

Oncidium crispum flowers are one to two inches across. The flowers are a bright, rich, copper color and the lip is blotched with golden yellow. The flowers bloom in winter.

Flowers of Oncidium Crispum

Oncidium crispum flowers are one to two inches across. The flowers are a bright, rich, copper color…

Oncidium excavatum flowers are golden yellow and they are spotted and blotched at the base with rich, bright brown. This variety is native to Peru.

Oncidium Excavatum

Oncidium excavatum flowers are golden yellow and they are spotted and blotched at the base with rich,…

Oncidium luridum flowers are usually a dull yellow or olive green color splotched with brown.

Flower of Oncidium Luridum

Oncidium luridum flowers are usually a dull yellow or olive green color splotched with brown.

Butterfly plant is the common name of oncidium papilio. The flowers are pale, golden yellow barred with chesnut brown. The flowers sometimes resemble a butterfly in shape.

Habit and Detached Flower of Oncidium Papilio

Butterfly plant is the common name of oncidium papilio. The flowers are pale, golden yellow barred with…

Oncidium serratum flowers are usually rich, bright brown with a yellow border. The margins are crisped or very serrated.

Flower of Oncidium Serratum

Oncidium serratum flowers are usually rich, bright brown with a yellow border. The margins are crisped…

The sepals and petals of oncidium varicosum flowers are pale, dull green with dull brown. The lip is large and bright yellow. The scapes are strong, about three feet long.

Flowers of Oncidium Varicosum

The sepals and petals of oncidium varicosum flowers are pale, dull green with dull brown. The lip is…

Ononis rotundiflora flowers are rose and grow on three flowered stems. The flowers bloom in summer. The leaves are roundish and toothed.

Habit and Detached Single Flower of Ononis Rotundiflora

Ononis rotundiflora flowers are rose and grow on three flowered stems. The flowers bloom in summer.…

The common name of onosma is golden drop. The stellulatum tauricum variety has yellow flowers that are about one and a half inches long. The flowers bloom in summer. The stems are branched.

Onosma Stellulatum Tauricum

The common name of onosma is golden drop. The stellulatum tauricum variety has yellow flowers that are…

Optunia brachyarthra is a variety of prickly pear. The flowers are very small. The prickles grow in groups of three to five.

Optunia Brachyarthra

Optunia brachyarthra is a variety of prickly pear. The flowers are very small. The prickles grow in…

Optunia multiflora is a variety of prickly pear. The flowers are yellow and bloom in summer. The branches are large and flattened. The spines are numerous and clustered.

Flowering Branch of Optunia Multiflora

Optunia multiflora is a variety of prickly pear. The flowers are yellow and bloom in summer. The branches…

Optunia rafinesquii is a variety of prickly pear. The flowers often have a red center and numerous petals. The cactus grows one foot tall.

Optunia Rafinesquii

Optunia rafinesquii is a variety of prickly pear. The flowers often have a red center and numerous petals.…