Please take the time to read the actual description of Tricker's variety of Gloriosa from Tricker's 1926 Catalog, and was offered in 1926 for $ 5.00 each:

Gloriosa. This remarkable red Nymphaea has given such universal satisfaction that we recommend it as the nucleus of every collection. It is thoroughly at home in tub, a pool, or a lake, and will thrive under extreme conditions. The fragrant floating blossoms are often 6 to 7 inches across, in perfect form, and rather double. The color deepens on successive days and the bright carmine of spring-time becomes dark currant-red later in the season. The excellent qualities persist in the cut flowers which continue to open for about five days when floated in a bowl. This attractive feature of Waterlilies is often overlooked, though cutting the blooms stimulates their production just as does in the case of many other plants. While it is customary to regard catalogue descriptions as unduly optimistic, we assure you that it is unnecessary for us to exaggerate the good points of Gloriosa. It is a Lily, according to many customers, "blooms and blooms and is just lovely".