You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "While Opuntia is from the genus of the cactus family, what genus is the Houttuynia?" whose answer is two species in the Saururaceae.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Houttuynia genus
Useful Output:

Doc 1: Houttuynia cordata, the single member of the Houttuynia genus in the Saururaceae family, is widely used as a leafy vegetable and medicinal
Doc 2: A taxonomic genus within the family Saururaceae – heartleaf or lizard tail.  Hyponyms. edit. (genus): Houttuynia cordata, Houttuynia emiensis - species
Doc 3: *Houttuynia Thunberg. A monotypic genus, a perennial herb, native of e. and se. Asia.
Doc 4: one species; east Asian low-growing plant of wet places. synonyms: Houttuynia. see moresee less. type of: dicot genus, magnoliopsid genus.
Doc 5: Houttuynia Genus: All Species · Houttuynia capensis · Houttuynia cordata · Houttuynia emeiensis · Houttuynia foetida · Trending Families · Cacti · Euphorbia · Orchids.