Gelasine is a cormous genus in the Iridaceae family native to South America. It produces short lived flowers, but there can be many over a long period if not allowed to set seed. They are not supposed to be very hardy.
Gelasine coerulea (syn. Sisyrinchium coeruleum ) is from southern Brazil. Seed photo by David Pilling.
Gelasine elongata (syn. Gelasine azurea) is from southern Brazil and Uruguay and is found in grasslands to 100 meters. It has bright-blue or violet flowers that open in the morning and flowers in the summer. Although it is advised to treat this one like a Tigridia having it be hot and moist in summer and dryish in winter, I have found it can be grown on a Mediterranean cycle and given summer water. It stays evergreen for me treated this way and seems to do best in the ground, not a container. The first two photos by Bob Rutemoeller and the third from Bill Dijk. The fourth photo shows the pleated blades of a pot of seedlings in their second year grown by M. Gastil-Buhl.
Gelasine uruguaiensis ssp. orientalis is a rare plant from Uruguay. It is found in a region of Uruguay that is rather warm with many slights frosts in winter. It is an autumn/winter/spring grower and summer dormant. This one bloomed only briefly in May in 2003 and then didn't bloom again until May 2011. It is being grown in a pot in California. A few short lived flowers are produced at the top of a long scape. Photo 1 by Bob Rutemoeller and 2-3 from Mary Sue Ittner. The last one shows it blooming in a pot with some volunteer clarkias.