Bulb odoratissimum or Bulb trichosepalum???

[King_of_orchid_growing:)]

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).

[Dorothy]

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."

[King_of_orchid_growing:)]

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.

[Dorothy]

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.

[King_of_orchid_growing:)]

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

[Dorothy]

Awesome enlightenment
Thanks for your research and findings