Just counted hundreds of last year’s now dead plants of Fern Grass Catapodium rigidum at the Copley Valley Development site. It’s an annual. Not in Murgatroyd(1994) and considered very rare by Wilmore in the WY Plant Atlas.
It grows in disturbed, calcareous soil and is a very distinctive little grass. I’m happy to show it anyone down there.
There are good pics of it on the New England Wildflower Society website.