Dendroculus in Genshin Impact is part of patch 3.0 that brought the region of Sumeru to the Teyvat ... upon one of these items while checking a mountain, a cavern, or even a giant robot, and ...

Nilotpala Lotus can be found in areas around Sumeru City, the Palace of Alcazarzaray, Varanara, and Devantaka Mountain. The easiest way to find them is by following the rivers and waterfalls.