Yes, these are nobile type hybrids.
I love these plants very much and I have a bunch myself.
Well, you don't have to water much anyways because even when your plants were in bloom, I see they all had completely mature cane, which you can expect flowers out of in the coming spring.
During the winter rest, you still want to water but much less because plants are not in active growth mode and therefore do not need as much water.
Some say no water the entire winter, but I highly recommend against this. People do not correctly understand what "dry" rest means. Dry is more like "drier than", rather than "bone dry".
The back bone species of these hybrids come from area where they grow rapidly during the hot rainy summer and during this time (summer monsoon) they will get poured down on every day.
Once that season passes, the rain is much less frequent and this weather continues throughout the winter into the spring.
However, during this time, plants received a lot of water in the form of very humid air and early morning dews. They are basically watered every singly day in the wild just like many other orchids.
In the cultivation, you want to learn from this and try to simulate as much as you can.
For an easy comparison, my nobile hybrid growing in a 4 inch pot with bark chips are watered almost daily during the summer while it is growing actively. or if I slack off, say I forgot to water for three days (during hot summer days this is long enough time for the newly and acitvely growing leaves to wrinkle and stick together) I would soak the entire pot for a while.
Once I see the very last leaf on top of the cane, which is usually around late summer into fall, I start to reduce watering to, I don't know, about twice a week.
During the winter, watering frequency is up to how cold you keep your plants.
These are very hardy plants and will survive near freezing just fine. When you are keeping them this cold, you only need to water occasionally, and do it in the morning on sunny day.
Yamamoto dendrobium website says 14.4 C (58F) is the minimum night temperature for their hybrids. A bit colder, and you will be guaranteed to have a great blooming.
Anyways, I now grow my nobiles in my apartment that does not get cold enough for them. So I water at least once a week.
Let the canes be your guide.
I water enough so that the canes are all plump.
Slight wrinkles won't harm them, but not recommended.
Good luck!
Regarding the name, the first one looks to me like Country Girl I have.
The second one might be Violet Fizz 'Luna'.
Just my thoughts.
It's odd that plants sold at a show come with no tag.
Whatever they are, they basically take the same nobile hybrid culture I shared on this post.
Dendrobium winter rest?
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