Nii nagu rotid ja hiired on koduloomad, nii on ka taimede seas selliseid, mis elavad inimese juures vastu tema tahtmist.
"Umbrohi," teadis Margarita.
Ja tal oli õigus. Umbrohud on väga erinevad ja levivad erineval moel. Margarita kirjutas erinevatest umbrohtudest:
Ohakas..................................................................................
...............................................................................................
................................................................................................
................................................................................................
Orashein..................................................................................
...............................................................................................
...............................................................................................
................................................................................................
Malts.......................................................................................
...............................................................................................
................................................................................................
...............................................................................................
Vesihein...................................................................................
................................................................................................
..............................................................................................................................
.............................................................................................................................
________..............................................................................................................
.............................................................................................................................
..............................................................................................................................