Australia is the only continent without any native butterworts. Carnivorous plants found at this park include Venus flytraps, pitcher plants, butterworts and bladderworts. Both sundews commonly live side-by-side with American pitcher plants ("Sarracenia"), butterworts, and bladderworts. Plants typically found here include butterworts, sundews, heather, and bilberry, among many others. The name is still used for butterworts in Tirol, Austria. As a result, most butterworts live in humid environments. Pinguicula esseriana is a small carnivorous plant in the genus "Pinguicula", the butterworts. Butterworts are widely cultivated by carnivorous plant enthusiasts. The genus "Pinguicula" contains the 83 species of butterworts, belonging to the bladderwort family (Lentibulariaceae). Butterworts are distributed throughout the northern hemisphere (map). As well as sexual reproduction by seed, many butterworts can reproduce asexually by vegetative reproduction. Butterworts are often cultivated and hybridized primarily for their flowers. Like all members of the family Lentibulariaceae, butterworts are carnivorous. In general, butterworts grow in nutrient-poor, alkaline soils. Butterworts are usually only able to trap small insects and those with large wing surfaces.