We have had this warm growing species native to southern China and Vietnam in our collection for sixteen years and the plant produces a single flower spike each autumn with large delicate flowers. The leaves are thin and terete suggesting a dryish natural habitat although it is reported to grow on mossy conifers in open but humid forest from 250-1200m altitude.
We grow the plant mounted and spray it daily and keep it hanging high in our Warm Asia section.
Holcoglossum is a small genus (about 12 species) closely related to Vanda but distinguished by the very different lip shape. The long spur can be seen in our photo both in the buds and on the top flower and this feature suggests hat the species is pollinated by large moths or butterflies.