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BFNA | Family List | BFNA Vol. 1 | Pottiaceae | Tortula

Tortula inermis (Bridel) Montagne, Arch. Bot. 1: 136. 1832.

  • Syntrichia inermis (Bridel) Bruch
  • Syntrichia subulata var. inermis Bridel

    Leaves lingulate, apex rounded-acute, apiculate to short-mucronate, margins recurved from base to near the apex, not bordered; costa subpercurrent, percurrent or very short-excurrent, lacking an adaxial pad of cells but distally narrowing or weakly thickened, 3--4(--5) cells across the convex adaxial surface; distal laminal cells hexagonal, (12--)15--18 µm wide, 1:1, strongly papillose with 4--5 2-fid papillae. Sexual condition gonioautoicous. Sporophytes exerted. Seta 1.2--1.5(--2.5) cm. Capsules stegocarpic, not systylius, cylindric, erect and nearly straight, urn usually 3--4 mm; peristome length 1000--1500 µm, teeth of 32 filaments twisted at least one full turn, basal membrane 300--600 µm; operculum 1.3--1.6(--2) mm. Spores 11--15 µm, spheric, finely papillose.

    Capsules mature spring. Soil, rock; 0--1980 m; Ariz., Calif., Colo., Nev., N.Mex., S.Dak., Tex., Utah, Wyo.; Mexico (Baja California, Chihuahua, Sonora); Europe; s Asia; n Africa.

    Tortula inermis has the aspect of a Syntrichia with its ligulate, apiculate leaves and strong costa, but the plant is yellow or orange in KOH solution, and the costal section reveals a rounded stereid band. It is related to T. subulata and T. mucronifolia but the lack of a strong mucro and the narrow but nearly complete recurving of the leaf margins are diagnostic.


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