Mielichhoferia tehamensis Showers, Bryologist 83: 365, figs. 1-3. 1980

Plants shiny light green, yellow-green, or white-green, light brown below. Stems 0.5-1 cm, somewhat julaceous, strongly branched. Leaves imbricate when dry, erect to erect-spreading when moist, elliptic to oblong, 0.5-1 mm; margins plane; apex rounded-obtuse to broadly acute, apiculus absent; costa subpercurrent, yellowish; laminal cells 40-80(-100) × 10-20 µm; distal cells at apex irregularly short-rectangular to subquadrate. Seta red-brown, 0.3-0.7 cm, flexuose. Capsule horizontal to nutant, short and broadly pyriform, 1.2-2.5 mm; operculum convex, umbonate; peristome absent. Spores 10-14 µm, ± smooth.

Capsules mature Aug (summer). Crevices of volcanic rock in montane areas; high elevations (2200-2600 m); of conservation concern; Calif.

Haplodontium tehamense is a distinctive species, with eperistomate capsules and somewhat julaceous stems. The species is known only from a few locations in Lassen Volcanic National Park.