The Dragon Orchid is native to Thailand and is
supposed to be fragrant.
The dragon orchid (Dendrobium draconis, Orchidaceae)
which usually blooms in northern Thailand in March is native to eastern
India and Southeast Asia including Thailand. Being a native to deciduous and
evergreen forests (500-2000 m) it’s quite common and I have seen it in the
wild on Shorea roxburghii in Chiang Rai. The dragon orchid may resemble
another common orchid (Dendrobium infundibulum), which is a characteristic
of Doi Inthanon national park. The dragon orchid has an orange-red blotch on
its lip and quite slender petals, while D. infundibulum usually has a yellow
blotch and strikingly broad petals. Although the dragon orchid is said to be
fragrant, I cannot feel any fragrance at all (a very subjective and
unreliable character which also vary between strains). A striking feature of
the dragon orchid is the long and slender mentum, a spur-like structure
which is more sac-like in another similar species, D. formosum..