Question: In between Chusquea and Bolax which one is endemic to temperate South America?

Context paragraphs:
Phaneromyces: Phaneromyces is a genus of saprobic fungi in the monotypic family Phaneromycetaceae (order Ostropales).  "Phaneromyces" consists of two species known from temperate South America.

Austroomphaliaster: Austroomphaliaster is a fungal genus in the family Tricholomataceae.  It is a monotypic genus, containing the single species Austroomphaliaster nahuelbutensis, found in temperate South America.

Austroclitocybe: Austroclitocybe is a genus of fungi in the family Tricholomataceae.  The genus is monotypic, containing the single species Austroclitocybe veronicae, found in temperate South America.  The genus was circumscribed by Jörg H. Raithelhuber in 1972.

Lathyrus: Lathyrus (commonly known as peavines or vetchlings) is a genus in the legume family Fabaceae and contains approximately 160 species.  They are native to temperate areas, with a breakdown of 52 species in Europe, 30 species in North America, 78 in Asia, 24 in tropical East Africa, and 24 in temperate South America.  There are annual and perennial species which may be climbing or bushy.  This genus has numerous sections, including "Orobus", which was once a separate genus.

Asteriscium: Asteriscium is a genus of flowering plant in the Apiaceae, with about 8 species.  It is endemic to temperate South America.

Bolax: Bolax is a genus of flowering plant in the Apiaceae, with 4 or 5 species.  It is endemic to temperate South America.

Heterobathmia pseuderiocrania: Heterobathmia pseuderiocrania is a type of moth that belongs to the Heterobathmiidae family.  It was identified by Kristensen and Nielsen in 1979.  It is found in temperate South America, including Argentina.  It is more commonly referred to as a southern beech moth.

Chusquea: Chusquea is a genus of evergreen bamboos in the grass family.  Most of them are native to mountain habitats in Latin America, from Mexico to southern Chile and Argentina.

Heterobathmia valvifer: Heterobathmia valvifer is a moth of the Heterobathmiidae family.  It was described by Kristensen and Nielsen in 1998.  It is found in temperate South America.

Helcomyzidae: The Helcomyzidae are a small family of flies in the Acalyptratae.  The larvae feed on kelp and other organic matter washed up on shorelines.  Species diversity is highest in New Zealand and south temperate South America.  They are sometimes allied with the families Dryomyzidae or Coelopidae.

Supporting paragraphs: Chusquea Bolax
Answer: Bolax