Hibiscus flowers are not generally considered an endangered plant species. There are over 200 species of hibiscus, and many of them are actually quite common and widely cultivated.

However, some specific hibiscus species might be endangered due to factors such as:

* Habitat loss: Deforestation and development can destroy the natural habitats where certain hibiscus species thrive.

* Over-collection: Some rare hibiscus species are collected for their beauty or medicinal properties, which can deplete their populations.

* Climate change: Climate change can disrupt the delicate balance of ecosystems and threaten the survival of sensitive species.

If you are concerned about a specific hibiscus species, it's best to consult reliable sources such as botanical gardens, conservation organizations, or scientific publications for more information about its conservation status.