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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. It is often united with the column and can be ...
The inflorescence is densely covered with up to 50 flowers. The sepals and upper petals are violaceous or purple (hence the Latin name purpurea of the species). The flower's labellum is pale pink or white, with a center spotted by clusters of violaceous or purple hairs.
The white flowers are arranged in a spiral around the stem. Each flower is 6–12 millimetres (0.2–0.5 in) long and consists of 3 sepals and 3 petals, all curved forward to give the flower a long bell shape. Flowers are slightly to strongly nodding (hence the name), with older flowers usually nodding more than new ones.
The flower secretes a fluid (see Coryanthes alborosea picture) into the flower lip, which is shaped like a bucket. The male orchid bees (not the females) are attracted to the flower by a strong scent from aromatic oils, which they store in specialized spongy pouches inside their swollen hind legs, as they appear to use the scent in their ...
The list of genera alone currently stands just short of 1000 entries. From a cladistic point of view, the orchid family is considered to be monophyletic, i.e. the group incorporates all the taxa derived from an ancestral group. The taxonomy of the orchids is explained on the page Taxonomy of the orchid family.
Dactylorhiza sambucina, the elder-flowered orchid, is an herbaceous plant belonging to the family Orchidaceae. It is quite common and widespread throughout much of Europe from Portugal east to Finland and Ukraine. The flowers appear in spring and summer, in various colors from yellow to purple.
The flowers are whitish on the outside and reddish brown inside. The sepals and petals are oblong to lance-shaped, 40–65 mm (2–3 in) long and 10–15 mm (0.4–0.6 in) wide. The labellum is pink or reddish with a white tip and white stripes inside, 35–60 mm (1–2 in) long and 20–50 mm (0.8–2 in) wide with three lobes.
Bulbophyllum is a genus of mostly epiphytic and lithophytic orchids in the family Orchidaceae. It is the largest genus in the orchid family and one of the largest genera of flowering plants with more than 2,000 species, exceeded in number only by Astragalus.