I visited the Soda Springs at Tuolumne Meadows on August 18, 2009 with the specific intent of locating Puccinellia nuttalliana. I did not relocate the occurrence. Has it become extirpated?
In the 1976-1977 drought, Triglochin coccinea became extirpated in a mineralized spring in the Harvey Monroe Hall Natural Area, where it had been recorded by Clausen & Keck decades before. It is uncertain when Puccinellia nuttalliana might have disappeared at the Soda Springs, but the 1976-1977 drought would be a good first suspect.