Physcomitrium immersum

Sullivant

in A. Gray, Manual, 648. 1848,.

Treatment appears in FNA Volume 27. Treatment on page 198. Mentioned on page 181, 182, 197.

Plants light green. Stems 2–3(–4) mm. Leaves obovate to ovate-lanceolate, distal leaves 2–3 mm; margins toothed or occasionally smooth distally; costa sub-percurrent to short-excurrent. Specialized asexual reproduction absent. Seta 0.5–1.2 mm. Capsule immersed, 1–1.2 mm, broadly cupulate; neck short, indistinct; exothecial cells irregular hexagonal or oblong, walls somewhat unevenly thickened; suboral cells consisting of 1–3 rows of short-rectangular cells. Spores 30–38 µm, papillose.


Phenology: Capsules mature late fall–spring.
Habitat: Wet soil in disturbed places
Elevation: moderate to high elevations

Distribution

V27 268-distribution-map.gif

B.C., N.B., N.S., Ont., Que., Colo., Iowa, Ky., La., Md., Minn., N.J., Oreg., Pa., Tex., Wash., Wis., South America.

Discussion

Physcomitrium immersum is easily recognizable by its immersed, broadly cupulate capsules that are usually clearly visible within the spreading leaves.

Selected References

None.

Lower Taxa

None.
... more about "Physcomitrium immersum"
Terry T. McIntosh +
Sullivant +
Gymnostomum subg. Physcomitrium +
B.C. +, N.B. +, N.S. +, Ont. +, Que. +, Colo. +, Iowa +, Ky. +, La. +, Md. +, Minn. +, N.J. +, Oreg. +, Pa. +, Tex. +, Wash. +, Wis. +  and South America. +
moderate to high elevations +
Wet soil in disturbed places +
Capsules mature late fall–spring. +
in A. Gray, Manual, +
Physcomitrium immersum +
Physcomitrium +
species +