Haplodontium tehamense

(Showers) J. R. Spence

Phytologia 87: 26. 2005.

EndemicIllustrated
Basionym: Mielichhoferia tehamensis Showers Bryologist 83: 365, figs. 1–3. 1980
Treatment appears in FNA Volume 28. Treatment on page 141.

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.


Phenology: Capsules mature Aug (summer).
Habitat: Crevices of volcanic rock in montane areas
Elevation: high elevations (2200-2600 m)

Discussion

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.

of conservation concern

Selected References

None.

Lower Taxa

None.