Deciduous trees
Oak
QUERCUS
Large handsome deciduous or evergreen trees with a massive pyramidal crown, leathery leaves, a deep root system with a strong taproot, less often shrubs.
Plants
Catalogue of imported encyclopedia entries.
Flowers for the garden
Oakwood aconite
Aconitum anthora
Plants of this species have pale yellow flowers with broad, semicircular hoods, and the divided leaves are dark green. The inflorescence is small.
Herbs
Oat-grass
HELICTOTRICHON
Family: Poaceae. Native to the western Mediterranean and the Alps. Mountain slopes up to 2400 m in elevation. The tallest of the perennial grasses with a blue sheen.
Fruit trees
Obilnaya Plum
Prunus salicina
A popular variety of cherry plum (plum). Fruits large, rounded, red-violet. Flesh of medium juiciness, orange, moderately fibrous, slightly darkening, of excellent flavor. Fruits ripen at the end of June
Deciduous trees
Obovate magnolia
Magnolia obovata Thunb.
A species of the genus Magnolia in the Magnoliaceae family. A deciduous shrub with a broad-pyramidal crown. Leaves green, borne at the tips of shoots, grouped in 8–10.
Conifers
October clematis
Paniculata Franch & Sav.
October clematis (Paniculata Franch & Sav.) - short description of the species on Your Garden
Indoor plants
Odontoglossum
Odontoglossum
Native to the mountainous regions of Central America. Ovoid flattened pseudobulbs bear rather thin leathery leaves. Inflorescences are long,
Climbing plants
Okhotsk clematis
Atragene ochotensis
A shrubby liana. Reaches 3 m in length, thrice-ternate leaves have long petioles, and flowers up to 8 cm in diameter have a broadly bell-shaped form.
Indoor plants
Oleander
Nerium
A monotypic genus of flowering plants of the family Apocynaceae. A large evergreen shrub with oppositely arranged leathery dark green lanceolate leaves.
Deciduous shrubs
Oleaster
Elaeagnus L.
Oleaster (Elaeagnus L.) - a brief description of the species on Your Garden
Fruit trees
Olive tree
Olea europaea
A species of evergreen subtropical trees of the genus Olea (family Oleaceae). It is a shrub or tree with a twisted trunk. Leaves are narrow-lanceolate, leathery, dark green. Flowers white, fragrant, in panicles. Fruits …
Deciduous shrubs
Olympic St. John's-wort
Hypericum olimpicum
Olympic St. John's-wort (Hypericum olimpicum) - a brief description of the species on Your Garden
Indoor plants
Oncidium
Oncidium
Most Oncidiums are epiphytes with a sympodial growth habit, extremely diverse in structure and size, which is explained by their growing conditions
Deciduous shrubs
One-flowered cotoneaster
Cotoneaster uniflorus Bunge
A species of unarmed deciduous shrubs in the genus Cotoneaster. A low, strongly branched shrub. Leaves ovate, dark green. Flowers borne singly or in pairs, pink or greenish-white. Fruits spherical, bright red.
Herbs
One-sided narrow-furrow
S. secundatum
Family Poaceae. Found in wet places, usually near the seashore, in the tropics and subtropics of the Americas.
Flowers for the garden
Onion or Allium
Allium
Plants of this genus have a characteristic odor and a pungent taste caused by the presence of volatile essential oils. The genus includes about 600 species.
Indoor plants
Operculicarya
Operculicarya
Another name for Operculicarya is false Japanese pepper, because this plant is very similar to Zanthoxylum, a plant of the Rutaceae family.
Indoor plants
Ophiopogon (Lilyturf)
Ophiopogon
A low evergreen herbaceous plant with a rhizome and tufts of narrow linear leaves that together form a dense turf. It blooms in July–August, producing erect shoots bearing white or lilac flowers gathered into a narrow s…
Flowers for the garden
Ophrys
Ophrys
The genus Ophrys is, without doubt, the most significant and interesting group of terrestrial orchids both in Europe and beyond. Members of this genus are absolutely unique: nowhere else in the plant kingdom will you fi…
Flowers for the garden
Ophrys bertolonii
О. bertolonii Moretti
Plants 8-30 cm tall. Tubers rounded. Stem ribbed, bluish-green. Leaves bluish-green, with distinct venation; lower leaves 2-5 in number, elongate-lanceolate; upper leaves narrower. Bracts longer than the ovary
Indoor plants
Oplismenus or Ostianka
Oplismenus
This is an evergreen trailing plant resembling Zebrina, notable for its originality and exceptional undemanding nature. Ostianka blooms like all grasses, with panicle inflorescences and small flowers. It branches well a…
Indoor plants
Opuntia
Opuntia
Family Cactaceae. Opuntias represent an entire subfamily, the Opuntioideae.
Indoor plants
Orange
Citrus sinensis
An evergreen small tree. Leaves oval-elongated. Petioles with small wing-like appendages. Flowers white, bisexual, fragrant.
Indoor plants
Orange Alstroemeria
Alstremeria aurantiaca D.Don
Perennial plant with tuberous thickened roots. Leaves alternate, thin, linear-lanceolate, up to 10 cm long and 1.5 cm wide, glaucous beneath, with short petioles, below the inflorescence forming a whorl.