蕴
=
艹
+
缊
:
Yu the Great (yu) is accumulating (蕴) sheets of artificial lawn (艹) in the encampment's bathroom ((e)n4). She bundles the sheets using stripes of hemp (缊).
蓄
=
艹
+
畜
:
Xu Xian (xu) is storing up (蓄) herds of cows (畜) in the space station's bathroom (Ø4). Each herd is living on a sheet of artificial lawn (艹) and when he gets a new herd, he just adds another layer on top.