Bryophytes (Mosses, Liverworts, and Hornworts) • Earth.com

Tritomaria exsectiformis

(Tritomaria exsectiformis)

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Description

Vedlobmossa ( Tritomaria exsectiformis ) is a leaf species first described by Breidl, and got its current name of Victor Félix Schiffner and Leopold Loeske. According to the Catalog of Life, Vedlobmossa was included in the lobmossor genus and the Scapaniaceae family, but according to Dyntaxa the belonging is instead the genus lobmossor and the family Lophoziaceae. According to the Finnish Red List, the species is closely threatened in Finland . The species is reproducing in Sweden. Nature's habitat is nature mosquito nets. Plants ca. 0.5--3 cm - 1.5--2 mm, ascending, green to brownish. Stems 0.2--0.3 mm diam., sparsely branching, transverse section with 2--3 cortical cells and 12--18 medullary cells; rhizoids colorless to brownish. Leaves succubous, contiguous to imbricate, conduplicate-concave, ovate to oblong-ovate, 0.8--1.2 - 0.5--0.8 mm, unequally 2--3-lobed (median lobes often absent); antical lobes smaller than postical lobes, apex acuminate to acute, margins entire; cells rounded-rectangular, marginal cells 14--18 - 18--22 m m, median cells 14--22 - 20--35 m m, basal cells 20--25 - 28--40 m m, cuticle strongly verruculose, walls thin, trigones strongly bulging; oil bodies 5--12 per cell, spherical to ovoid, 3--5 - 4--6 m m, granular, grayish; underleaves absent. Specialized asexual reproduction by gemmae in masses at apices of shoots, rust-red or bright red, polygonal to pyriform, 12--25 - 10--25 m m, 2-celled. Sexual condition dioicous. Androecia terminal, often with gemmae at tips, male bracts similar to leaves, 3-lobed, with antheridia, 1--2 androus, antheridial stalk 1-seriate. Gynoecia terminal, female bracts larger than leaves, ovate, 3--4-lobed. Perianth free from the bracts, cylindrical, 4--6 plicate, mouth constricted, lobulate with teeth 2--5 cells long. Capsule ovoid, walls 2--4-stratose, exterior walls with nodular thickenings, interior walls with semiannular thickenings, reddish-brown. Elaters ca. 7--10 m m diam., 2-spiral, reddish-brown. Spores 9--12 m m, papillose. Subspecies 2 (2 in the flora): widely distributed across the northern part of the floral range.

Taxonomic tree:

Domain:
Kingdom: Plantae
Phylum: Bryophyta
Class: Jungermanniopsida
Order:Jungermanniales
Family:Lophoziaceae
Genus:Tritomaria
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