poem by William Wordsworth entitled "I Wandered Lonely as a Cloud"
Now I am anything but a poet. However, I did see close to 10,000 trilliums, maybe not in a single glance but over an interval of an hour and a hillside. The following shows their state of blooming this year.
More or less: all the whites are trilliums. (There were a few other species with white flowers but not enough to alter the statistics - I haven't showed all the plants.