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The three sepals and two of the petals are often similar to each other but one petal is usually highly modified, forming a "lip" or labellum. In most orchid genera, as the flower develops, it undergoes a twisting through 180°, called resupination, so that the labellum lies below the column. The labellum functions to attract insects, and in ...
3. Encyclia Orchids. Upon first glance, this flower resembles an octopus thanks to its dangling petals and sepals. Besides their unique and aquatic-like appearance, their leaves are also statement ...
Arrangement of the perianth parts in orchids, showing the petals (P), sepals (S) and labellum (L). Cattleya labiata flower, note the arrangement of the perianth pieces in relation to the upper outline. No plant family has such a diverse range of flowers. Flowers are highly specialized in relation to their pollinators.
Petals are usually accompanied by another set of modified leaves called sepals, that collectively form the calyx and lie just beneath the corolla. The calyx and the corolla together make up the perianth, the non-reproductive portion of a flower. When the petals and sepals of a flower are difficult to distinguish, they are collectively called ...
Lycaste flowers, like all orchid blooms, have three petals and three sepals. The petals are typically yellow, white, or orange, and the sepals are yellow, orange, green, or reddish brown. The petals and sepals may be marked sparsely or densely with red, reddish purple, purple, or reddish brown spots.
It is not unusual for the other two petals of an orchid flower to look like the sepals, so that the labellum stands out as distinct. [1] In orchids, the labellum is the modified median petal that sits opposite from the fertile anther and usually highly modified from the other perianth segments.
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