Spikelets are too delicate to be B diandrus and would need to be on much longer pedicels to be that species. There are 2 different length glumes which are shorter than the lemmas (typical of Vulpia) and the plant appears to be a cool-season annual (small crown, all starting to die off). So Vulpia. Low glume is a minute triangle. Would need to know if flowerhead was fully exerted (V muralis) or partially enclosed (V myuros)
I did go back but could not relocate the same plant. I will keep an eye on the location next spring. Thank you to all the moderator's for your efforts. We now have over 680 species listed for Dryandra Street Woodland... a nice data complement to all the environmental weeding the friends are undertaking.