In Australia, "scattered naturalized populations exist in the understorey of coastal dry sclerophyll forest and sand dune vegetation throughout south-east Queensland and New South Wales". It is considered a rampant and dangerous invasive weed in Australia, dominating the coastal dunes at the expense of native species and leading to deaths of native animals and birds when ingested. In India, "Gloriosa" is distributed in the Western Ghats but the density is rapidly decreasing due to excessive uprooting by herbal medicine producers. "Propagation generally occurs from seeds, although mature plants can be divided and grown from tubers. The hard seeds can remain dormant for 6-9 months." Growth stops if temperatures are of the order of 15 ° and the dies when subjected to 12 ° during this time. La Gloriosa is an extremely fragile and delicate flower, tough to cultivate. All parts of "Gloriosa" contain colchicine, the roots and seeds are especially rich. The lethal dose of colchicine is about 6 mg/kg, and "Gloriosa superba" has been used as a means of committing suicide. "Gloriosa superba" is the national flower of Zimbabwe (where it is a protected plant). A diamond brooch in the shape of the flame lily was a gift from Southern Rhodesia (modern day Zimbabwe) to Queen Elizabeth II on a visit in 1947 while she was still the crown princess. It is also the state flower of Tamil Nadu state in India.