Dendrobium densiflorum, luteo-alba (???)

[Fairorchids]

I purchased this plant from Equagenera at a show, about 2 years ago (February 2019?).

According to the rules for Latin & Taxonomy, the name is wrong. Since Dendrobium ends in 'um', so should the varietal name (= luteo-album).

Kew checklist of monocots, does not recognize this plant/varietal name. In a vacuum, I would say that it is Dendrobium thyrsiflorum (which is recognized by Kew), but I invite comments from the forum readers.

The first two photos show the plant I have in bloom. The 3rd photo is a Den. thyrsiflorum I photographed years ago.

[DirtyCoconuts]

Stunning and what a balancing act!!!

[Roberta]

Looked it up in Orchidwiz. It does list a Den. densiflorum, with a solid yellow flower. Here's the reference:
"Dendrobium densiflorum" Lindl. in N.Wallich, N.Wallich, Pl. Asiat. Rar. 1: 34 (1830)

Yours sure looks like Den. thyrsiflorum to me. I'm no expert on the genus - there may be others that look similar. But it sure looks like it... it definitely looks nothing like what Orchidwiz shows... IOSPE photo looks the same - lots of butter-yellow flowers. No mention of a "luteo-alba" variety. (I did an Orchidwiz search on Dndrobium (containing "luteo") to see if anything came up. Nope, nothing close)

Then I changed approach... looked up Den. thyrsiflorum in Orchidwiz, and looked at the "Names" screen to find possible names that might have been used at some time. Bingo.
1869 Dendrobium densiflorum var. alboluteum Hook.f.

Assigned to its own species, Den. thrysiflorum in 1871

So it's a synonym or obsolete name for Den. thyrsiflorum (and misspelled on the tag that it came with)

[smweaver]

It looks like thrysiflorum to me also. It's also one fantastic looking plant--and that gorgeous spike of flowers isn't too bad either! Does it have more spikes that are forming, or just the one?

[Fairorchids]

Only 1 spike, and it is the first time it is blooming.

When I bought it, I thought it was about BS, but plant has grown steadily taller each year. Latest canes are almost twice as tall as the original plant.

Will have to repot when it is done with bloom.

[yug]

Whatever it turns out to be...

Great blooming!!