Plants That Start with "O"

24 plants in this collection

№ 001
Odontonema callistachyum purple firespike, erect amethyst flower spike above glossy green foliage
Purple Firespike
Odontonema callistachyumPurple Firespike

The purple firespike answers a quiet complaint of the warm-climate gardener, that the tropical border runs to reds and hot corals and forgets the cooler end of the spectrum. Odontonema callistachyum carries erect spikes of tubular, lavender-to-amethyst flowers at the tip of nearly every branch, each spike lengthening to almost a foot as the buds open in succession from fall into spring. The genus name joins the Greek odous, a tooth, with nema, a thread, for the small toothed filaments within the bloom, while the epithet callistachyum means, simply and accurately, beautiful spike. The leaves are broad, glossy, and faintly fleshy, a lacquered dark green that holds the plant together as a handsome mound even between flushes.

Hardiness
Zones 8–11
Light
Full Sun / Part Shade
Height
5–6 ft.
Spread
3–4 ft.
Bloom
Purple
Plant type
Shrub
$18.00In stock
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№ 002
Olea yunnanensis Yunnan olive, glossy dark evergreen foliage on a shrub
Yunnan Olive
Olea yunnanensisYunnan Olive

A true olive for the shade, Olea yunnanensis is the sort of plant that rewards the gardener who reads labels twice. The genus is the olive genus, kin to the ancient Mediterranean fruit tree and to the sweet olives and privets of the same family, yet this species hails from the mountains of Yunnan in southwestern China rather than the sun-baked hills of the Old World. The narrow, leathery, dark green leaves carry an unmistakable Osmanthus cast, glossy above and paler beneath, and build into a dense, rounded evergreen canopy that holds the year.

Hardiness
Zones 7–10
Light
Full Sun / Part Shade
Height
10–30 ft.
Spread
10–25 ft.
Bloom
White
Plant type
Shrub
$23.00In stock
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№ 003
Osmanthus armatus (holly olive), spiny holly-like evergreen leaves with clusters of fragrant cream-white flowers
Holly Olive
Osmanthus armatusHolly Olive

Osmanthus armatus, a rare gem from the evergreen forests of western China, brings both elegance and resilience to the garden. This large, multi-branched shrub is known for thick, lustrous, dark green leaves adorned with prominent marginal and terminal spines, reminiscent of holly.

Hardiness
Zones 6–9
Light
Full Sun / Part Shade
Height
10–15 ft.
Spread
10–15 ft.
Bloom
White
Plant type
Shrub
$38.00In stock
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№ 004
Osmanthus heterophyllus 'Variegatus' variegated false holly, spiny cream-edged evergreen leaves
Variegated Holly Tea Olive
Osmanthus heterophyllus 'Variegatus'Variegated Holly Tea Olive

'Variegatus' brings light to the false holly. The spiny, holly-like evergreen leaves are edged in clean creamy white against a dark green center, so the whole shrub reads as a soft glow at a distance and a crisp, formal pattern up close. The variegation lifts a shaded corner the year round, a quiet luminance that the plain green species cannot offer.

Hardiness
Zones 6–9
Light
Full Sun / Part Shade
Height
6–10 ft.
Spread
5–8 ft.
Bloom
White
Plant type
Shrub
$23.00In stock
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№ 005
Osmunda cinnamomea (cinnamon fern), arching green sterile fronds around upright cinnamon-brown fertile fronds
Cinnamon Fern
Osmunda cinnamomeaCinnamon Fern

Step into a North American wetlands grove, and you'll find Osmunda cinnamomea, the majestic cinnamon fern, standing tall on fronds that arch with the dignity of cathedral windows. Native to rich, damp woodlands and boggy stream edges across eastern North America, this stately fern thrives in humus-laden soil, the base cloaked in cinnamon-colored fibers that inspired the common name. In spring, the center of each dark green vase unleashes erect fertile fronds, spore-tossing cinnamon sticks that rise above the sterile foliage before maturing to warm, russet brown.

Hardiness
Zones 3–10
Light
Part Shade / Full Shade
Height
2–6 ft.
Spread
2–5 ft.
Plant type
Fern
$22.00In stock
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№ 006
Osmunda regalis var. spectabilis (American royal fern), airy bright green bipinnate fronds in a vase-shaped clump
American Royal Fern
Osmunda regalis var. spectabilisAmerican Royal Fern

In the dim, humid hush of a Southern swamp or the shaded edges of a woodland stream, Osmunda regalis var. spectabilis, commonly known as the American royal fern, stands as a silent monarch. This grandiose fern, native across eastern North America, unfurls towering fronds that burst upward in graceful rosettes, often reaching 3 to 6 feet tall with a spread of 2 to 3 feet. The distinctive, dignified look has earned these ferns the moniker flowering fern, a nod to the upright, spore-laden fertile fronds that crown each spring with tassel-like clusters before maturing to russet-brown.

Hardiness
Zones 3–9
Light
Part Shade / Full Shade
Height
3–6 ft.
Spread
2–3 ft.
Plant type
Fern
$22.00In stock
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№ 007
Odontonema strictum firespike, erect scarlet flower spike above glossy dark green foliage
Firespike
Odontonema strictumFirespike

Few plants light a shaded corner the way firespike does. Odontonema strictum raises erect spikes of slender, tubular, scarlet flowers to a foot long from late summer into winter, each spike a torch held above dark, glossy, quilted foliage. The genus name pairs the Greek odous, a tooth, with nema, a thread, for the toothed filaments inside the bloom, and the plant answers to a tangle of common names, firespike, cardinal's guard, and firestick among them, though firespike is the one that sticks.

Hardiness
Zones 8–11
Light
Full Sun / Part Shade
Height
4–6 ft.
Spread
2–4 ft.
Bloom
Red
Plant type
Shrub
$26.00Currently unavailable
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№ 008
Oenothera fruticosa ssp. glauca sundrops, bright yellow day-blooming flowers on a sunny mound
Sundrops
Oenothera fruticosa ssp. glauca (tetragona)Sundrops

Sundrops make a gentle joke of their family. Oenothera fruticosa ssp. glauca belongs to the evening primroses, a tribe famous for opening at dusk and closing by mid-morning, yet the sundrops break ranks and bloom by day, holding cups of clear, satiny yellow wide open through the sunlit hours of late spring and early summer. The genus name comes from the Greek oinos, wine, and thera, to hunt or seek, an old and disputed reference to a European relative whose roots were once thought to give a taste for wine; the epithet fruticosa means shrubby, for the firm, upright stems, and glauca notes the blue-green bloom on the foliage.

Hardiness
Zones 4–8
Light
Full Sun / Part Shade
Height
12–24 in.
Spread
12–18 in.
Bloom
Yellow
Plant type
Perennial
$16.00Currently unavailable
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№ 009
Osmanthus americanus devilwood, glossy spineless evergreen leaves of the native wild olive
Devilwood
Osmanthus americanusDevilwood

Devilwood earns the odd name honestly. Osmanthus americanus carries a wood so cross-grained and stubborn that early woodworkers swore the timber was possessed, and the name has stuck for centuries, a small piece of American folklore hung on an otherwise gracious plant. The leaves are leathery, elliptical, and smooth-margined, a deep glossy green without the spines that arm so many tea olives, and they build into a dense, rounded evergreen of fifteen to twenty-five feet, handsome as screen, understory, or small tree.

Hardiness
Zones 6–10
Light
Full Sun / Part Shade
Height
15–25 ft.
Spread
12–18 ft.
Bloom
White
Plant type
Shrub
$23.00Currently unavailable
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№ 010
Osmanthus fragrans sweet osmanthus, glossy evergreen tea olive foliage with tiny white flowers
Fragrant Tea Olive
Osmanthus fragransFragrant Tea Olive

Some plants are grown for the eye and some for the nose, and sweet osmanthus belongs wholly to the second camp. The very name tells the story: Osmanthus joins the Greek osme, a scent, with anthos, a flower, and fragrans doubles down, so the botanical name reads almost as fragrant fragrant-flower. The blooms themselves are tiny, waxy, and creamy white, tucked so far back among the leaves that a passerby often smells the plant long before finding the flowers, a warm apricot-and-honey perfume that carries across a whole garden on a mild autumn day.

Hardiness
Zones 7–9
Light
Full Sun / Part Shade
Height
15–25 ft.
Spread
8–12 ft.
Bloom
White
Plant type
Shrub
Traditional use
respiratory support, digestive health
$27.00Currently unavailable
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№ 011
Osmanthus fragrans 'Conger Yellow' tea olive, close-up of butter-yellow fragrant flowers
Tea Olive 'Conger Yellow'
Osmanthus fragrans 'Conger Yellow'Tea Olive 'Conger Yellow'

For all the sweet osmanthus grown across the South, most carry the same tiny white flowers, so 'Conger Yellow' arrives as a quiet surprise: a clone bearing clusters of soft, butter-yellow blooms against notably large, glossy leaves. The flowers keep the family gift, that warm apricot-and-honey perfume that drifts on autumn air and, in mild climates, returns in scattered flushes through much of the year, strongest as evening cools.

Hardiness
Zones 8–9
Light
Full Sun / Part Shade
Height
15–20 ft.
Spread
6–8 ft.
Bloom
Yellow
Plant type
Shrub
Traditional use
respiratory support, digestive health
$23.00Currently unavailable
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№ 012
Osmanthus fragrans 'Fudingzhu' tea olive, dense clusters of creamy-white fragrant flowers
Fudingzhu Tea Olive
Osmanthus fragrans 'Fudingzhu'Fudingzhu Tea Olive

'Fudingzhu' turns the usual tea olive up a notch. Where most sweet osmanthus scatter a modest few flowers among the leaves, this selection smothers itself in dense, bead-like clusters of small, creamy-white blooms, so freely and for so long that the name is said to mean pearls upon the Buddha's head, for the way the pale flowers crown the plant. The scent is the pure osmanthus perfume, a rich sweetness of ripe apricot and peach that carries on the evening air.

Hardiness
Zones 8–10
Light
Full Sun / Part Shade
Height
10–15 ft.
Spread
5–8 ft.
Bloom
White
Plant type
Shrub
Traditional use
respiratory support, digestive health
$23.00Currently unavailable
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№ 013
Osmanthus fragrans aurantiacus orange sweet olive, clusters of deep-orange fragrant flowers
Orange-flowered Fragrant Tea Olive
Osmanthus fragrans aurantiacusOrange-flowered Fragrant Tea Olive

The orange sweet olive is the tea olive at full volume. Where the common form carries tiny white flowers, Osmanthus fragrans f. aurantiacus bears clusters of deep yellow to burnt orange, and the color comes with an even richer scent, a heady sweetness of ripe apricot and peach that fills a garden on a still autumn afternoon. The blooms open in one great, concentrated flush, brief at perhaps a week or two, but so heavy that the whole plant seems to smoke with fragrance while it lasts.

Hardiness
Zones 7–9
Light
Full Sun / Part Shade
Height
20–25 ft.
Spread
6–10 ft.
Bloom
Orange
Plant type
Shrub
Traditional use
respiratory support, digestive health
$23.00Currently unavailable
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№ 014
Osmanthus heterophyllus 'Goshiki' false holly, cream-and-gold variegated spiny leaves flushed pink
Holly Osmanthus 'Goshiki'
Osmanthus heterophyllus 'Goshiki'Holly Osmanthus 'Goshiki'

Grown for the leaf rather than the flower, 'Goshiki' is the most colorful of the holly osmanthus. The name means five colors in Japanese, and the spiny, holly-like evergreen leaves earn it: flecked and mottled with cream and yellow against dark green, and flushed at every new growth with startling pink and orange that slowly settles to gold and green. The species name heterophyllus, from the Greek for different-leaved, fits the whole clan, whose juvenile leaves bristle with holly teeth while older ones smooth to entire margins.

Hardiness
Zones 6–9
Light
Full Sun / Part Shade
Height
4–6 ft.
Spread
3–5 ft.
Bloom
White
Plant type
Shrub
$23.00Currently unavailable
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№ 015
Osmanthus heterophyllus 'Gulftide', a fragrant evergreen tea olive offered by Woodlanders.
Holly Osmanthus 'Gulftide'
Osmanthus heterophyllus 'Gulftide'Holly Osmanthus 'Gulftide'

'Gulftide' is the tea olive to reach for when you want the fragrance of the genus and the toughness to carry it through a cold winter. A dense, upright evergreen with glossy, dark green, spiny holly-like leaves, this selection covers itself in tiny waxy white flowers in autumn, and the scent they throw is out of all proportion to the size of the bloom, sweet and carrying, one of the real pleasures of the fall garden.

Hardiness
Zones 7–9
Light
Full Sun / Part Shade
Height
10–15 ft.
Spread
8–12 ft.
Bloom
White
Plant type
Shrub
$23.00Currently unavailable
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№ 016
Osmanthus heterophyllus 'Rotundifolius' round-leaf false holly, thick spineless nearly round dark green leaves
Round Leaf Holly Osmanthus
Osmanthus heterophyllus 'Rotundifolius'Round Leaf Holly Osmanthus

Among the false hollies, 'Rotundifolius' is the gentle contrarian. Where the species arms the youthful leaves with fierce holly spines, this old form lays them down entirely: the leaves are small, thick, and rounded, nearly circular and spineless, a heavy, puckered dark green that reads more like boxwood or a miniature bergenia than an osmanthus. The oddity is the whole appeal, a curiosity that stops a plantsman mid-path.

Hardiness
Zones 8–9
Light
Full Sun / Part Shade
Height
5–8 ft.
Spread
5–8 ft.
Bloom
White
Plant type
Shrub
$23.00Currently unavailable
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№ 017
Osmanthus heterophyllus 'Sasaba', a holly-leaved evergreen tea olive offered by Woodlanders.
Holly Osmanthus 'Sasaba'
Osmanthus heterophyllus 'Sasaba'Holly Osmanthus 'Sasaba'

'Sasaba' is the holly osmanthus taken to a theatrical extreme, grown less for flower than for the sheer drama of the leaf. Each dark, glossy, evergreen leaf is cut and incised into narrow, spine-tipped lobes that jut out in every direction, so that the whole shrub reads as a slow green explosion. The Japanese name says it well: sasaba means bamboo leaf, for the narrow, divided foliage.

Hardiness
Zones 7–9
Light
Full Sun / Part Shade / Full Shade
Height
4–7 ft.
Spread
3–5 ft.
Bloom
White
Plant type
Shrub
$23.00Currently unavailable
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№ 018
Osmanthus suavis Himalayan sweet olive, narrow dark evergreen leaves with small white fragrant flowers
Himalayan Sweet Olive
Osmanthus suavisHimalayan Sweet Olive

Osmanthus suavis is the mountain member of the sweet olive family, a shrub of quiet, upright grace carried down from high ground. Native to the cool slopes of the eastern Himalayas and the misted forests of southwest China, the plant has the unhurried resilience of alpine flora, and the narrow, pointed, finely toothed leaves, darkly lustrous and neatly held, give a formal, upright presence the year round.

Hardiness
Zones 8–9
Light
Full Sun / Part Shade
Height
6–10 ft.
Spread
4–6 ft.
Bloom
White
Plant type
Shrub
$23.00Currently unavailable
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№ 019
Osmanthus × burkwoodii, a fragrant evergreen spring-flowering shrub offered by Woodlanders.
Burkwood Osmanthus
Osmanthus x burkwoodii (x Osmarea burkwoodii)Burkwood Osmanthus

Osmanthus burkwoodii is one of the most reliable and sweetly scented of the spring evergreens, a dense, compact shrub that disappears under clusters of tiny white flowers in April and perfumes the whole garden around it. The small, dark green, leathery leaves are finely toothed and glossy, holding their color and structure through the year, so that the plant earns a place long after the fragrance has faded.

Hardiness
Zones 6–8
Light
Full Sun / Part Shade
Height
5–8 ft.
Spread
4–6 ft.
Bloom
White
Plant type
Shrub
$23.00Currently unavailable
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№ 020
Osmanthus x fortunei 'Natchez' Fortune's tea olive, dense holly-like evergreen shrub
Fortune's Tea Olive
Osmanthus x fortunei 'Natchez'Fortune's Tea Olive

Osmanthus x fortunei 'Natchez' is a hybrid that takes the best of two parents. The cross joins Osmanthus fragrans, the sweet olive treasured for its perfume, with Osmanthus heterophyllus, the false holly valued for tough, spiny, evergreen foliage, and 'Natchez' inherits both gifts: a dense, glossy, holly-leaved frame and a flood of fragrance in fall. The hybrid takes the name of the old river town of Natchez, Mississippi, a nod to the Deep South gardens where these tea olives have long been at home.

Hardiness
Zones 7–9
Light
Full Sun / Part Shade
Height
15–20 ft.
Spread
8–15 ft.
Bloom
White
Plant type
Shrub
$23.00Currently unavailable
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