Plants that Start with O

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Plants that Start with O

Our planet is very rich in flora species. There are millions of species that we can’t even imagine. Most of the names in this list are scientific names for the species. All of them start with the letter O.

Herbs that start with O

Ocimum: basil.

– The ocimum or basil is used for making pesto.

Old maid: commonly cultivated Old World woody herb having large pinkish to red flowers. Any of various plants of the genus Zinnia cultivated for their variously and brightly colored flower heads.

– The  old maid herb grows bright pink flowers and it’s found in Madasgacar.

Onobrychis: genus of Old World herbs having pinnate leaves and pink or whites racemose flowers followed by flat unjointed pods.

– The onobrychis grows between rocks in the white mountains of Greece.

Opium poppy: southwestern Asian herb with greyish leaves and white or reddish flowers; source of opium.

– Opium poppy flowers resemble to red tulips. They are very beautiful flowers/

Flowers that start with O

Obedience plant: white-flowered West Indian plant whose root yields arrowroot starch.

– The flowers of the obedience plant can be arranged to look like natural bouquets.

Oenothera fructiosa: a day-flowering biennial or perennial of the genus Oenothera.

– The oenothera fructiosa belongs to the evening primerose family.

Oleander: an ornamental but poisonous flowering shrub having narrow evergreen leaves and clusters of fragrant white to pink or red flowers: native to East Indies but widely cultivated in warm regions.

– Do you know that the oleander is one of the most poisonous plants on Earth?

Ononis repens: European woody plant having pink flowers and unifoliate leaves and long tough roots; spreads by underground runners.

– The ononis repens grows near the shores.

Ophrys: a hardy genus of terrestrial orchids of Europe and northern Africa and western Asia.

– If you look carefully you will notice it is an ophrys and not an insect as we think.

Orchid: any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors.

Beautiful orchids Bloom in the National Park; pink, white, orange, and purple orchids everywhere.

Trees that start with O

Oak: a deciduous tree of the genus Quercus; has acorns and lobed leaves. The hard durable wood of any oak; used especially for furniture and flooring.

– The old oak tree shared its branches with the sparrow.

Obeche: large west African tree having large palmately lobed leaves and axillary cymose panicles of small white flowers and one-winged seeds; yields soft white to pale yellow wood.
The wood of an African obeche tree; used especially for veneering.

– The obeche is a strong and heavy wood. It’s timber has knots.

Ochroma: one species: balsa.

-The leaves of the ochroma tree are very large. They look like giant plant leaves.

Olea: evergreen trees and shrubs having oily one-seeded fruits.

– The courtyard was surrounded by olea trees.

Ombu: fast-growing herbaceous evergreen tree of South America having a broad trunk with high water content and dark green oval leaves.

– The roots of the ombu tree don’t grow underground, they are visible.

Jungle and swamps that start with O

Oenanthe aquatica: poisonous herbs: water dropworts.

– The oenanthe grow in wet mud and grow little flowers.

Orange mushroom pimple: a variety of mushroom pimple.

– The orange mushroom pimple is a fungus that attacks other mushrooms species, making them turning orange.

Order alismales: an order of aquatic monocotyledonous herbaceous plants.

– Almost all of the 4,500 order alismales species are aquatic.

Order Isoetales:aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

– The order isoetales looks like grass growing underwater.