What is the largest Dendrobium species?

[pinksnappingorchid]

what Dendrobium has the thickest and longest stem?

[sbrofio]

I know a D. discolor form can reach 3m (10feet) and also violaceoflavescens can grow u to 2.5 m (8-9 ft) as adult plant

[Afid]

The antelope types can get very tall (well over 6 feet sometimes). Other sections can also get quite large but as far as height goes I think they are the tallest.

[camille1585]

Den delicatum can get really large. Orchideengarten (a vendor in Germany) has one so big that they need a forklift to transport it!

Dendrobium - Orchideengarten Karge in Dahlenburg (you have to scroll down a bit for photos of Den delicatum)

[Roberta]

And then there is Den. speciosum... I encountered this one very early in my orchid "career"... right after I had bought a small Den. speciosum at another show and thought "OMG, did I buy a St. Bernard puppy?" Mine never grew like this one, fortunately. The award info claims 100000 flowers on 400 inflorescences... pity the poor clerk who had to count them. It had grown for about 30 years in a wine barrel outdoors in Santa Barbara, California.