This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 蘶 is uncertain. It appears to combine 艹 (grass) with 魏, but the original semantic and phonetic roles are unclear.
The grass radical 艹 sits above 魏, but without a clear meaning, picture an overgrown, mysterious plant named after the ancient state of Wei.
For ギ, imagine a geeky botanist studying this obscure plant: geek -> ギ, and the grass radical 艹 hints at the plant theme.