Notobubon galbanum, blister bush or in Afrikaans bergseldery (mountain celery), is a robust, resin-scented shrub that grows from 1 m to 3 m. The genus, generally referred to as hog’s fennel, belongs to the Apiaceae or carrot family, but this species is inedible and shouldn’t be touched. It has a taproot and hollow stems that branch sparsely. The name has recently been changed from Peucedanum galbanum.

The distribution in the southwestern Cape ranges from Elandsbaai and Piketberg to the Cape Peninsula and eastwards as far as Albertinia.

The winter rainfall habitat is mainly upper slopes, often sheltered among rocks, in ravines and damp areas. The plant is normally found growing in well-drained clay or sandy soils. The species is not considered to be threatened in its habitat early in the twenty first century (Manning, 2007; www.redlist.sanbi.org).