Flora of North America species comparison

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Forsstroemia trichomitria

forsstroemia moss
Stem

and branch leaves lanceolate, ovate-lanceolate, broadly ovate-lanceolate, 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.
Seta

0.4–3.9 mm.
Sexual condition

autoicous, often gonioautoicous.
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.

Forsstroemia trichomitria
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
Distribution
from FNA
AL; AR; CT; DC; DE; FL; GA; IN; KY; LA; MA; MD; MI; MO; MS; NC; NJ; NY; OH; OK; PA; SC; TN; TX; VA; VT; WI; WV; ON; Mexico; South America; e Asia; e Australia
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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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 28, p. 625.
Parent taxa Leptodontaceae > Forsstroemia
Sibling taxa
F. producta
Synonyms Pterigynandrum trichomitrion, Leptodon trichomitrius, L. trichomitrius var. floridanus, L. trichomitrius var. immersus
Name authority (Hedwig) Lindberg: Öfvers. Kongl. Vetensk.-Akad. Förh. 19: 605. (1863)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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