These are scanned seeds/fruits (almost inseparable) of Hordeum jubatum, commonly known as foxtail barley or squirreltail barley.
Lauren Brown, in Grasses – An Identification Guide, writes:
Considered beautiful by botanists and a noxious weed by ranchers because the bristles pierce animals’ tongues and can cause serious injury.
As you might surmise, this grass is listed as a noxious weed in many states and provinces with ranchland. The long swirling parts are variously awns (bristle-like growths extending from the lemma) or long glumes. The family Poaceae has its own set of inflorescence terminology, illustrated succinctly on this page, though a bit on the small side. A larger, but more diagrammatic version, can be seen here.
The scale at the bottom of this scan by Eric (who artfully arranged them) is in millimeters.
Botany resource link: In case you missed it in yesterday’s comments, Dr. Tom Volk (University of Wisconsin – Lacrosse) has compiled a huge online resource for fungi, including the Fungus of the Month.