Acaulon triquetrum

(Spruce) Müller Hal.

Bot. Zeitung (Berlin)5: 100. 1847,

Basionyms: Phascum triquetrum
Found in FNA Volume 27. Treatment on page 638. Mentioned on page 639.
Plants three-angled, about 1 mm. Stem leaves cuspidate, keeled; laminal cells, 13–18 µm wide, 1–3:1, smooth. Seta as long as the diameter of the capsule. Spores 25–30(–40) µm, finely papillose.

Phenology: Capsules mature late autumn-spring.
Habitat: Soil, sand, clay, old fields, pastures, roadside banks, temporarily moist areas
Elevation: low to moderate elevations

Distribution

Ont., Sask., Calif., Ill., Iowa, Mass., N.J., Tex., Va., W.Va., Europe, Asia, n Africa, Australia.

Discussion

Acaulon muticum var. rufescens has reflexed apices while A. triquetrum does not always have these, though illustrated as such by H. A. Crum and L. E. Anderson (1981). The exsiccat C. F. Austin, Musci Appalachiani 52 has a short seta and the plant is 1.2 mm, and is placed here with A. muticum var. rufescens.

References

None.

Facts about "Acaulon triquetrum"
AuthorRichard H. Zander +
BasionymPhascum triquetrum +
Elevationlow to moderate elevations +
HabitatSoil, sand, clay, old fields, pastures, roadside banks, temporarily moist areas +
IllustratorPatricia M. Eckel +
PhenologyCapsules mature late autumn-spring. +
ReferenceNone +
Taxon nameAcaulon triquetrum +
Taxon parentAcaulon +
Taxon rankspecies +
VolumeVolume 27 +