Crypsis alopecuroides, foxtail pricklegrass, an annual bunchgrass, lies mostly prostrate on the sandy and gravelly shores of the Jefferson River in this area. The short cylindrical spikes are much like those of Timothy except for being much shorter (mostly abrout 2-3 cm long) and borne at the ends of prostrate to ascending stems. The combination of this spicate inflorescence, annual rosette growth form, and a hairy ligule is very distinctive.

Flickr album and species diagnosis at https://www.flickr.com/photos/plant_diversity/sets/72157690491904616/