How to recognize Homalotheciella subcapillata: This little glossy yellow-green mat-forming moss creeps along on trees with short curved erect branches. The narrow oblong-ovate acuminate leaves have a short weak single costa, with sharp teeth nearly to the base. Under the microscope there are quadrate alar cells in a triangular group extending up the side of leaf 1/4 of the length. The capsules are pale and smooth and erect but asymmetric and supported by a 10 mm long papillose seta or stalk.
Where to find Homalotheciella subcapillata: Look on trees and branches in woods especially in southern Ohio.