菀

yùn
  1. (obsolete on its own in Standard Chinese) alternative form of 蘊 /蕴 (“to accumulate; to gather”)
  2. alternative form of 蘊 /蕴 (“to accumulate; to gather”)

Wiktionary

Homographs

菀 wǎn used in 紫菀 zǐwǎn
菀 yù luxuriance of growth
菀 yuàn