Top portion of the pseudobulb bears pure white flowers 30–40 mm (1–2 in) long and wide.

Flowering is sporadic but is triggered nine days after a sudden drop in temperature of at least 5.5 °C (40 °F), usually as a result of rain, although the same effect can be artificially created.

[5] Dendrobium crumenatum was first formally described in 1799 by Olof Swartz and the description was published in Heinrich Schrader's Journal für die Botanik.

[6][7] The specific epithet (crumenatum) is derived from the Latin word crumena meaning "leather moneybag".

It is found in India, Indochina, Taiwan, the Philippines, Singapore, Malaysia, Indonesia, New Guinea, and Christmas Island.