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The article "Anatomy of an Orchid Flower" published in Illustrated Orchid Encyclopedia describes an amazing flower structure of orchids, which is quite different from other flowers.
The orchid flower usually contains such parts as an outer whorl of three sepals, an inner whorl of three petals, and a single large column.
The first part of the orchid flower is the sepals, which protect the flower bud from external influences. There is one dorsal sepal and two lateral sepals.
The second part of the orchid flower is an inner whorl of three petals, which contains two side sepals, and a bottom petal or a lip. This lip attracts insects for pollination.
The final part of the orchid flower structure is a single reproductive male and female organ. However, there are some kind of orchids that produce male and female flower separately.
In general, the shape of the flowers are symmetrical and the flower twist 180 gedree around its flower stalk to position the lip on the bottom. This unique process is called resupination, and according to the dictionary means being upside-down. Also, the author informs us that many tropical orchids are pollinated by the certain species of insects. Some of them even have pollinator relationships with hummingbirds and bats.
LAELIA
(Lc Kevin Green 'Margie' X Lc California Nuget 'Susan')
CATTLEYA
(C. Mt Hood 'Dilworth')
PAPHIOPEDILUM
(Paphiopedilum virens)
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The orchid flower usually contains such parts as an outer whorl of three sepals, an inner whorl of three petals, and a single large column.
The first part of the orchid flower is the sepals, which protect the flower bud from external influences. There is one dorsal sepal and two lateral sepals.
The second part of the orchid flower is an inner whorl of three petals, which contains two side sepals, and a bottom petal or a lip. This lip attracts insects for pollination.
The final part of the orchid flower structure is a single reproductive male and female organ. However, there are some kind of orchids that produce male and female flower separately.
In general, the shape of the flowers are symmetrical and the flower twist 180 gedree around its flower stalk to position the lip on the bottom. This unique process is called resupination, and according to the dictionary means being upside-down. Also, the author informs us that many tropical orchids are pollinated by the certain species of insects. Some of them even have pollinator relationships with hummingbirds and bats.
LAELIA
 | 1. Sepals - Although they may look like petals, they are actually the glorified remains of the flower bud. There are usually three of approximately equal size.2. Petals - Orchids always have three petals. Two are "normal," and the third becomes a highly specialized structure called a lip. 3. Lip or Labellum - The lower petal of an orchid. Used by the flower to provide a 'landing platform' for its pollinator.4. Column - A finger-like structure that carries the orchid's reproductive organs--the stigmatic surface (female organs) and the pollinia (male organs) located under the anther cap (operculum). |
CATTLEYA
 | 1. Sepals - Although they may look like petals, they are actually the glorified remains of the flower bud. There are usually three of approximately equal size.2. Petals - Orchids always have three petals. Two are "normal," and the third becomes a highly specialized structure called a lip. 3. Lip or Labellum - The lower petal of an orchid. Used by the flower to provide a 'landing platform' for its pollinator.4. Column - A finger-like structure that carries the orchid's reproductive organs--the stigmatic surface (female organs) and the pollinia (male organs) located under the anther cap (operculum). |
PAPHIOPEDILUM
 | 1. Sepals - Although they may look like petals, they are actually the glorified remains of the flower bud. There are usually three of approximately equal size, but not always. The two lateral sepals are fused into one and the dorsal (top) sepal is greatly enlarged in the case of the paphiopedilum and others.2. Petals - Orchids always have three petals. Two are "normal," and the third becomes a highly specialized structure called a lip. 3. Lip or Labellum - The lower petal of an orchid. Used by the flower to provide a 'landing platform' (or a trap, in this case) for its pollinator.4. Column - A finger-like structure that carries the orchid's reproductive organs--the stigmatic surface (female organs) and the pollinia (male organs) located under the anther cap (operculum). |
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