Reservoir Canyon trails. Growing all around waterfall and riparian area, completely shaded with cool microclimate compared to the rest of the area. This is the smallest brachythecium!
This little moss is positively overflowing with asexual propagules called gemmae. If you zoom in on the photo you should be able to see them - they are bright yellow green rounded packets of cells nestled into and falling out of the leaf axils. This is on flat disturbed soil at the base of bush mallow along with many other species of mosses.
The photo taken under the microscope shows one leaf and one gemma. The gemma has little leaf like projections (primordia) and there are many gemmae per leaf axil which indicates G. barnesii
This is a sample of Gemmabryum klinggraeffii that was grown in a lab from vegetative propagation of GK from Cherokee Park in Louisville, Kentucky.
This moss was part of a study of the sex ratios in dioecious bryums.
GK is characterized by the raspberry-like rhizoidal tubers.