
These are tender bulbs from Africa that belong to the Iris family, Iridaceae. They need the same treatment as Gladiolus, but need a longer growing season. This is why it is better, in the North, to plant groups of them in large tubs or pots; they are set outside during the summer and brought into a cool greenhouse before frost. They will bloom...
Found on
http://www.encyclo.co.uk/local/10004

any bulbous African plant belonging to the genus Acidanthera, of the iris family, having sword-shaped leaves and long tubular flowers.
Found on
https://www.infoplease.com/dictionary/acidanthera
No exact match found.