Question: Are  Ixia and Billbergia both flowering plants?

Context paragraphs:
Billbergia: Billbergia is a genus of flowering plants in the family Bromeliaceae, subfamily Bromelioideae.  The genus, named for the Swedish botanist, zoologist, and anatomist Gustaf Johan Billberg, is divided into two subgenera: "Billbergia" and "Helicodea".  They are native to forest and scrub, up to an altitude of 1,700 m , in southern Mexico, the West Indies, Central America and South America, with many species endemic to Brazil.

Tritonia (plant): Tritonia (flame freesia) is a genus of flowering plants in the iris family first described as a genus in 1802.  They are naturally distributed across southern Africa, with a high concentration of species in Cape Province of western South Africa.  The genus is closely related to the genus "Ixia".

Ixia: The genus Ixia consists of a number of cormous plants native to South Africa from the Iridaceae family and Ixioideae subfamily.  Some of them are known as the corn lily.  Some distinctive traits include sword-like leaves and long wiry stems with star-shaped flowers.  It usually prefers well-drained soil.  The popular corn lily has specific, not very intense fragrance.  It is often visited by many insects such as bees.  The "Ixia" are also used sometimes as ornamental plants.

Supporting paragraphs: Ixia Billbergia
Answer: no