From the original paper of 2011
Dendrobium hekouense (Orchidaceae), a New Species from Yunnan, China
HABITAT ECOLOGY. Dendrobium hekouense grows in primary evergreen broad-leaved forests on limestone slopes in subtropical highland to the south of the Tropic of Cancer. The average annual temperature is 17.6 °C, the average temperature of the coldest month 10.1 °C, and that of the hottest month 23 °C. The rainy season comes with the SW monsoon, continuing from April to October, when the region is covered by dense fog in the morning and night. There is no fog in the dry season that begins in November, running onto March. The forests where D. hekouense dwells are mainly dominated by species of Fagaceae, such as those of Quercus, Lithocarpus and Castanopsis. Dendrobium hekouense was often seen growing on their trunks. The canopy density of these forests is often 80%–85%, but D. hekouense often grows in more or less sunny places.
The flowering period of D. hekouense is from August to September, in the middle of the rainy season.