Dendrobium loddigesii (Loddiges' dendrobium) is a miniature to small sized, warm to cold growing epiphyte, lithophyte or terrestrial orchid that comes from Laos, Vietnam, and China. It is found in humid, mossy, mixed and coniferous forests at elevations of 1000 to 1500 meters, in areas with dry winter and a wet spring and summer. The plant has tufted, pendant, subterete, striated, several-noded, white-sheathed stems carrying alternate, fleshy, oblong, acute leaves.

Plicatol B is a phenanthrene that can be isolated from the orchid.

...