Sunday, September 25, 2011

All things orchid

Victorian society was enraptured by the many types of orchids being discovered and brought back by collectors from exotic lands. In his notebooks, horticulturist John Day painted thousands of exquisite watercolors of these unique flowers, which range from the elegant to the odd. You can pore over hundreds of them in A Very Victorian Passion: The Orchid Paintings of John Day, the large-format reproductions of which are beyond lavish!
 
Except for deserts, orchids live all over the world. Some thrive on the ground, whereas others grow on trees or rocks. What makes a plant a member of the Orchidaceae family? Kew Gardens gives the following criteria:
All orchids have protocorms, and these are not found in any other family. A protocorm is the structure formed after the germination of the seed and before the development of the seedling plant. The protocorm has no radicle and instead has mycotrophic tissue (and hence differs from other flowering plant seedlings).
Other important characters shared by most orchids include:
* The fusion of the male and female organs into a single structure, called the column.
* A large number of small seeds per ovary.
* Stamens are found on the abaxial side of the flower (the side facing downwards/away from the stem).
* The lip/labellum (a modified petal) occurs opposite the fertile stamen(s).
* Flowers are often resupinate (have twisted through 180° during development).
* Pollen is usually bound together to form large masses (called pollinia).










Aren't they fabulous?

2 comments:

  1. Simply gorgeous! Orchids are my favorite flower (next to tulips).

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