Ophrys apifera, known in Europe as the bee orchid, is a perennial herbaceous plant belonging to the family Orchidaceae. It is remarkable as an example of sexually-deceptive pollination and floral mimicry as well as of a highly-selective and highly evolved plant-pollinator relationship.
Ophrys apifera grows to a height of 15–50 centimetres (6–20 in). This hardy orchid develops small rosettes of leaves in autumn. They continue to grow slowly during winter. Basal leaves are ovate or oblong-lanceolate, upper leaves and bracts are ovate-lanceolate and sheathing. The plant blooms from mid-April in continental Europe, but in the United Kingdom it flowers June to July. A flower spike is produced, composed from one to twelve flowers. The flowers have large sepals, with a central green rib and colour varying from white to pink, while petals are short, pubescent, yellow to greenish. The labellum is trilobed, with two pronounced humps on the hairy lateral lobes, the median lobe is hairy and similar to the abdomen of a bee. The labellum is remarkable for displaying at least four distinct colours, in addition to the two colours of the sepals and petals. Pattern of labellum colouration is quite variable. The gynostegium is at right angles, with an elongated apex. Chromosomes 2n=36
Ophrys apifera is widespread across central and southern Europe, as well as North Africa and the Middle East. Its range stretches from Portugal, Ireland and Denmark east to Iran and the Caucasus. It is quite common in the Mediterranean region eastwards to the Black Sea, (Codes)  but is less common in its northern range being uncommon or local in Germany and Ireland.
In the UK, it has a distinct southeastern preference, being more common in England. Recently it has been found in the southwest of England in Butleigh near Glastonbury in Somerset; whereas it is only to be found in coastal regions of Wales as well as the Hodbarrow Nature Reserve in Millom, Cumbria, and some parts of Northern Ireland. It is relatively common in the northeast of England and in recent years large numbers have appeared in the grass verges surrounding the Metro Centre in Gateshead. In Scotland, it was thought to be extinct, but was rediscovered in Ayrshire in 2003. In some countries the plants have protected status. They are unusual in that in some years they appear in great numbers, then sometimes only reappear after an absence of many years.
Habitat and ecologyEdit
Ophrys apifera generally grows on semi-dry turf, in grassland, on limestone, calcareous dunes or in open areas in woodland. It prefers calcareous soils, in bright light or dim light. It is a major colonizer of sites disturbed by human activity, such as old quarries, roadside verges and airfields. O. apifera is one of the most likely European orchid species to establish itself within towns and cities.
Ophrys apifera relies upon a symbiotic relationship with mycorrhizal fungi in the genus Tulasnella, to extract sufficient nutrient from the soil it grows in. This makes it vulnerable to chemicals, particularly fungicides, but also other chemical applications which could reduce the prevalence of Tulasnella fungi.
Ophrys apifera is the only species of the genus Ophrys which preferentially practices self-pollination. The flowers are almost exclusively self-pollinating in the northern ranges of the plant's distribution, but pollination by the solitary bee Eucera longicornis occurs in the Mediterranean area. In this case the plant attracts these insects by producing a scent that mimics the scent of the female bee. In addition, the lip acts as a decoy as the male bee confuses it with a female. Pollen transfer occurs during the ensuing pseudocopulation.
The flowers emit allomones that attract the bee species Tetralonia cressa and Eucera pulveraceae. Eucera longicornis males have been observed attempting to copulate with the flowers. It is also believed that male bees would preferentially select orchids with the most bee-like lips and attempt to mate with them, transferring pollen in the process.
The name Ophrys derives from the Greek word ophrys, meaning "eyebrow", while the Latin specific epithet apifera means "bee-bearing" or "bee-bringing" and refers to the bee-shaped lip of the orchid.
The genus Ophrys is the most species-rich (i.e. diverse) genus of orchids in Europe and the Mediterranean with over 200 species, according to 'Orchids of Britain and Europe' by Pierre Delforge.
- Ophrys apifera var. apifera
- Ophrys apifera var. bicolor
- Ophrys apifera var. botteronii
- Ophrys apifera var. friburgensis
- Ophrys apifera var. immaculata
- Ophrys apifera var. trollii
Floral parts display the presence of quercetin and kaempferol glycosides, which are supposed to be acylated, as well as cinnamic acid derivatives. The pink outer tepals show the presence of anthocyanins.
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