I have actually (tried) to grow tropical orchids from seed. FWIW, I have been growing orchids since the 1980s, and was once the president of a local orchid-growers club.
Orchid seeds are dust-like, nothing like what you expect in other flowering plants (an orchid seed capsule 3 cm long and 2 cm diameter might contain several hundred thousand seeds). The seeds lack cotyledons (seed leaves) that supply nutrients to the growing plant in most flowering plants, so the seed contains just the "germ" that develops into an embryonic plant. Caveat emptor: you will sometimes see "orchid seeds" offered for sale on online sales sites, these are almost always fake.
Rather than relying on cotyledons to feed the growing embryo (called a protocorm), orchids in the wild rely on nutrients coming from very specific beneficial fungi. Growing the seeds in agar, specially formulated to supply the right nutrients, which mimic the nutrients from the fungi, is what orchid breeders do to produce large numbers of plants.
The seeds I tried growing came from one of my own orchid plants. I did my best to keep the equipment and agar sterile, and grow the tiny embryos into plants. I had a few tiny seedlings (out of hundreds of protocorms) that survived long enough to grow roots and tiny leaves. Sadly, all of the seedlings eventually succumbed to pathogenic fungi. The process to get plants that were less than 2 cm tall took me 3 years! I later tried having a professional orchid lab grow some seeds for me, those attempts also failed.
Something you CAN try at home: You have a wild orchid already growing in the ground. It is quite possible that the right fungi already live in the soil surrounding that plant*. Try taking the tiny dusty seed you have and scatter it on the soil surrounding that plant. Keep an eye on the area surrounding the plant, new orchid plants may develop from those seeds (be prepared to not see anything noticeable develop for many years). You can also try scattering seed in a new area that seems to be similar. Orchid seeds in the wild are usually dispersed by wind, so you can scatter some of that seed to the air on a windy day, you never know where they might land and take root. Keep in mind that of the hundreds of thousands of seeds in an orchid capsule, often only one or two will survive and make a plant.
Scotty, by the way, your orchids are spectacular!
* Some people try to take orchids from the wild and re-plant them at home; most often, this fails because of the lack of the right fungi in the garden soil, and the inability of the fungi to adapt to new growing conditions).
