Oncophorus strumulosus (Müller Hal. & Kindberg) E. Britton

Stems (0.5-)1-1.5 cm. Leaves ca. 2 mm, oblong-lanceolate to nearly linear, apex acute to somewhat obtuse; recurved generally in the middle third on one or both sides; margins 1-stratose; laminal cells strongly papillose-mammillose, distal and medial cells quadrate with rounded corners, 8-15 µm wide. Perigonium sessile. Seta (0.5-)0.8-1 cm, straight wet or dry. Capsule inclined, somewhat zygomorphic, strumose; annulus weakly developed.

Capsules mature summer. Soil over rock; high elevations; Alta., B.C.

The epithet strumulosum implies that the capsule is somewhat or sometimes strumose, but in the type specimen examined all the capsules were distinctly strumose. The illustration is drawn from the type specimen.