Bulb odoratissimum or Bulb trichosepalum???
 

What's the physical difference between Bulb odoratissimum and Bulb trichosepalum?

As far as I see, I don't see any physical difference. But they're listed under two different sections of Bulbophyllum. Bulb. odoratissimum (section Medusa), versus Bulb. trichosepalum (section Desmosanthes).

Here is the explaination of both bulbos as per IOSPE - Internet Orchid Species Photo Encyclopedia

Bulbophyllum trichocephalum - "Found from Thailand to China at altitudes around 800 to 1800 meters as a miniature sized, warm growing epiphyte with tubular shaped, rugose psuedobulbs carrying a single apical, broadly linear, petiolate leaf that has a slender, basal, 1 5/8" [4 cm] long inflorescence with 3 solitary acuminate bracts and carrying a cluster of several to many apical flowers.
This species is similar to B. odoratissimum."

Bulbophyllum odoratissimum - "Found in Assam, Eastern Himalayas, India, Nepal, Bhutan, Sikki, Myanamar,Thailand, Laos, Vietnam and China in evergreen lowland forests and primary montane forests at
elevations of 800 to 2500 meters as a miniature sized, warm to cool growing epiphyte or lithophyte on mossy rocks with subcylindric, spreading pseudobulbs carrying a single,apical, oblong-lanceolate leaf that blooms in the fall and winter on a basal, slender, 3" [7.5 cm] long, many flowered inflorescence that has bracts and a apical cluster of 10 to 20, fragrant flowers held at mid-leaf height. This species is best grown in baskets or pots with an open medium, partial shade, hot temperatures, and regular water and fertilizer."

Thanks.

I guess Bulb. odoratissimum has sub-cylindical pseudobulbs and an apical, oblong-lanceolate leaf. While Bulb. trichosepalum has cylindrical pseudobulbs and a broadly linear petiolate leaf.

I'm going to look up what they mean.

It seems that odoratissimum might be a bit more temperature tolerant than trichocephalum, as odoratissimum temp range is warm to cool and trichocephalum is a stated as warm.

Alright, now I've owned what was confirmed to be Bulb. trichosephalum by the botanist Leslie Garay, (according to GEM Orchids, aka. Macheila's Orchids), before so I know what the pseudobulbs look like. The shape is thin and cylindrical, like a miniature green Tootsie Roll, very straightforward.

Now, I just look at pictures of what was being sold as Bulb. odoratissimum. I actually see the difference! Since I can't properly describe the shape, here's a link instead:

http://cgi.ebay.com/Bulbophyllum-odo...QQcmdZViewItem

:clap: Awesome enlightenment
Thanks for your research and findings;)