Identificaciones de astorey_botany

I suspect this is the species after careful examination but I’m fairly new at IDing mosses, any help is appreciated! : )

Growing in association with Poa secunda ssp. secunda. on a N-facing slope on soil.

226
Exposed rock crack.

Very small, leaves <2mm. Hydroids present in half the xs. Retuse apex.
Costa not super serrate abaxially, maybe just slightly porate? Sterile gametophytes, no antheridia or archegonia, just paraphyses.
Papillae low, cells get quite tall and skinny in xs.