Monte Baldo Orchid Diversity: Nature’s Most Photogenic and Adaptive Flowers
If we exclude the edelweiss, orchids can be considered the most photographed flowers on Monte Baldo. Naturally, this is no coincidence. As photogenic (at least in most cases) as few other plant species, orchids are also among the most common flowers, given their widespread distribution and, above all, the large number of species (about 60 out of the 120 found in Italy and 20,000 worldwide) belonging to this group of flowering plants (Angiosperms).
This widespread presence and diversity of species can be justified by the great adaptability of orchids, which can thrive in any environment that supports the growth of green plants.
The term “orchid” derives from the Greek, specifically from “orchis,” meaning “testicle.” The name orchid originates from the shape of the roots of most of these plants, which consist of two tubers resembling testicles in appearance.
Among wild orchids, there are also Epipactis, Dactylorhizae (the latter named for the root shape that resembles a hand), Pistantherae, and Ophrys.
It is worth spending some extra words on the Ophrys, as they exhibit a particularly remarkable feature.
Their flowers emit a smell similar to pheromones, which are substances that serve as sexual attractants secreted by glands located in the abdomen of the female insect.
This attracts and excites the male insect, prompting it to land on the labellum of the flower, which apparently resembles the female’s abdomen, thereby inducing the insect to copulate.
At this stage, the insect’s head comes into contact with pollinia, two viscid masses of pollen that adhere to its body.
When it moves on to another flower, the insect deposits the pollinia in the receptive part (stigma), completing the pollination process.
Aside from the roots, orchids are distinctly different from other flowers in
Sepals in 3
, called the “labellum,” which is the most conspicuous part in terms of size and the variety of forms adopted by different species.
More specifically, it can be said that the primary “physiological” characteristic of orchids is the fusion of the male and female reproductive organs into a single structure called the gynostemium.
Thus, in unfavorable conditions, if they are not pollinated by insects, orchids can self-fertilize.
How? The retainer holding the pollinia lowers, and with the first breeze of wind, the pollinia fall into the stigma.
Furthermore, some orchids, such as Listera ovata, can reproduce vegetatively, as they produce bulbils from the bifurcated rhizome, which give rise to new plants.
Eugenio Cipriani
