There are 11 existing populations, but many of these have not been seen during recent surveys. Future surveys will determine if they should be considered extirpated. There are 16 historical occurrences.

In August 2004, Steve Young resurveyed nine of twelve occurrences documented by Bob Zaremba in the 1980s, but only two of them contained any plants. The habitat of three of the sites had succeeded to woody vegetation and the open habitat was no longer there. One roadside population was probably eliminated by mowing and another roadside population had been eliminated by Phragmites. Two populations were in areas that still seemed to have good habitat, but no plants were seen. The original populations of these last two sites were only 5-10 plants. One roadside population and one population in a grassy opening by a lake were still extant, although the number of plants was reduced.

There were less than 20 historical records for the state and presently there are 11 existing populations, although many of these may no longer be extant because of succession. The plant has probably declined from historical numbers, but it is hard to tell what the future long-term trend will be.