Wall Pellitory (Parietaria judaica). A ubiquitous urban weed, originally from Southern Europe and Asia Minor. If Melbourne gardeners maintained the state’s weeds list, this might be public enemy no 1. Equally happy colonising pavement cracks, fence lines, shrub bases and flower beds. Nearly impossible to dislodge once established in the urban shingle, Pellitory will be growing here until the end of time. Luckily it is not a prominent invader of natural areas, which it leaves to Victoria’s native Parietarias, or of grazed or cultivated land. It is nonetheless quite capable of establishing in degraded creeklines and other rocky margins beyond the urban edge.