I am in the process of planning out all the annual and perennial beds at my work. I grew some datura's last year. They were the double yellow and purple trumpets.
Last summer I passed a place that had a single white flower datura. Best of my knowledge it was either evening fragrance, belle blanche, or horn of plenty. These flowers were open in the afternoon. So I an thinking it was not evening fragrance. The plant was shrub like. About 3 feet by 3 feet with a graceful speading habit. The plants were covered in single white blooms all season.
Anyone know what variety it could have been? I see belle blanche for sale in white flower farms catalogue and horn of plenty for sale in Logee's book.