type of plant
蒄 refers to a type of plant. The exact species is not specified in the given meanings, so its core idea is simply an unidentified plant.
蒄 combines the plant radical 艹 with 冠, which likely provides the sound カン. The character was probably created to name a specific plant, but the historical details are uncertain.
The top grass radical 艹 marks this as a plant. The bottom part 冠 looks like a crown, so picture a crowned plant—a special type of plant worthy of a crown.
For カン, imagine a can of this special plant: can -> カン. The crowned plant comes in a can.
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common nutmeg (tree) (Myristica fragrans)