294 illustrations of flowers and shrubs including: narcissus, nelumbo, nettle, nightshade, oleander, olive, opium, orchid, orpine, oxalis, and oxeye
Pictured is the rootstock of nymphaea tuberosa. The tubers on the rootstock are one to three inches…
Nymphaeaceae is an order of aquatic herbs including the water lily family. This order has eight genera…
Leaves small, mostly less than 15cm. long, heart-shaped; flowers white and less than 2.5cm across.
Also known as rhus diversiloba. It is a poisonous shrub located on the Pacific coast of North America…
This flowering plant belongs to the honeysuckle family, commonly seen in the North Americas.
Pictured are flowers from the order of ochnaceae. The flowers pictured are (1) ochna, (2) gordonia,…
"Ochranthe arguta. 1. grain of pollen; 2. perpendicular section of its pistil." -Lindley, 1853
Species of an orchid; these flowers are usually seen in the southeastern parts of brazil.
Odontoglossum cervantesii decorum is an orchid with large flowers. The flowers are spotted inside and…
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…
The flowers of odontoglossum citrosmum are large and span around three inches across. The flowers range…
Odontoglossum crispum flowers have pure white sepals and petals and a yellow lip. The lip is spotted…
Odontoglossum crispum flowers are produced at any season of the year. The flowers are white and spotted…
The flowers of odontoglossum crispum bloom in crowded clusters. The leaves are a foot long. The plant…
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…
A genus of poisonous plants. It is commonly found in wet places including streamsides and ditches.
The common name of oenthera is evening primrose. The acaulis variety has white flowers fading into red.…
Pictured are the albicaulis and californica varieties of evening primrose. Albicaulis has white flowers…
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…
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 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.…
A pink flower that typically blooms in the Spring. The plant has been used for centuries as a medicinal…
Known as the purple betony, a perennial herb which may grow in excess of 65 centimeters.
"The castor oil plant belongs to an order whose affinities have not yet been accurately limited by botanists;…
Pictured are the flowers and fruits of the orders oleaceae, loganiaceae, gentianaceae, and apocynaceae.…
"The Oleander is the common and sweet-scented oleander. They have lanceolate coriaceous leaves, with…
A class of beautiful evergreen shrubs, known as rose laurel in France, and as rose bay in England. It…
Oleander and rose bay are the common names of nerium oleander. It is native to the Mediterranean region.
Olearia gunnia flowers are white and bloom in September. The branches are hoary. Pictured is a flowering…
"Flowering Branch of Oleaster (Elaeagnus angustifolia). a, fruit; b, section of same." -Whitney, 1911
Olive has been cultivated from the earliest times chiefly for its oil, which is obtained from the fruit…
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…
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,…
Oncidium luridum flowers are usually a dull yellow or olive green color splotched with brown.
Oncidium ornithorhynchum flowers are soft rose-purple and one inch across. The flowers bloom in autumn…
Butterfly plant is the common name of oncidium papilio. The flowers are pale, golden yellow barred with…
Oncidium serratum blooms in the winter and is native to Peru. The flowers are numerous and three inches…
Oncidium serratum flowers are usually rich, bright brown with a yellow border. The margins are crisped…
Oncidium tigrinum blooms in winter and is native to Mexico. The flowers are a rich, reddish brown with…
Oncidium varicosum rogersii specimens have borne 150 flowers. The flowers are yellow with a few red…
The sepals and petals of oncidium varicosum flowers are pale, dull green with dull brown. The lip is…
Germinating onion, morre advanced; the chink at base of cotyledon opening for the protrusion of the…