Argentine Giants (Echinopsis candicans) are cacti that look very dull and ordinary all year. But when they bloom, they are spectacular. Often they bloom at night, and by morning they are already looking a bit old. But yesterday morning I caught them when the blooms were just about ready to open.
All day we checked on them. By late afternoon, the blooms had opened. These flowers are at their prime, only a few hours old.
The flowers are large, about 5 inches across.