Forsstroemia trichomitria

Stem and branch leaves lanceolate, ovatelanceolate, broadly ovatelanceolate, oval, or deltoid, 1–3 × 0.5–1.2 mm; costa single, weak, 1/4–3/4 leaf length, or double, short; laminal cells fusiform to linear, 4–8: 1; medial cells 25–80 × 5–11 µm. Sexual condition autoicous, often gonioautoicous. Seta 0.4–3.9 mm. Capsule immersed to exserted, 1–2.3 × 0.4–1 mm; operculum 0.5–1.1 × 0.3–0.6 mm; exostome teeth smooth, minutely papillose, or occasionally granulose. Spores 18–30 µm.

Phenology: Capsules mature winter.
Habitat: Epiphytic, boles of hardwood trees, rock, bark of evergreen trees, shaded, relatively humid areas, along streams
Elevation: low to high elevations

Ont., Ala., Ark., Conn., Del., D.C., Fla., Ga., Ind., Ky., La., Md., Mass., Mich., Miss., Mo., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Tex., Vt., Va., W.Va., Wis., Mexico, South America, e Asia, e Australia

Discussion

Immersed capsules (with short setae) are very common in Forsstroemia trichomitria in the states bordering the Gulf of Mexico. However, from Virginia northward, capsules are nearly always either emergent or exserted. The two North American species of Forsstroemia rarely may form hybrids that have intermediate features of medial laminal cell length, costal length, frequency of single costae, seta length, post-fertilization perichaetial leaf length, and peristome appearance (L. R. Stark 1987). The secondary stems are usually subpinnate.

Selected References

None.

Lower Taxa