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Published In: Revue Bryologique 36(5): 114. 1909. (Rev. Bryol.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

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Bryum incrassatolimbatum is a semi-aquatic species with broad, obtuse to rounded, entire leaves, thin‑walled, lax and bulging leaf cells throughout, and multistratose leaf margins. In contrast to all other Central American Bryum species the leaf limbidia in this species are made up of enlarged, bulging, thin‑walled, rectangular cells. There are two other semi-aquatic species of Bryum in Central America: B. renauldii and B. limbatum. Bryum renauldii differs from it in having firm-walled upper leaf cells and a scarcely distinct, unistratose leaf limbidia.  Bryum limbatum is also similar in aspect to B. incrassolimbatum, but that species has a broader (to 5 cells wide), unistratose leaf limbidium that consists of linear, thick‑walled cells and serrate to serrulate leaf margins.

Illustrations: Shaw (1981, Figs. 1–7); Ochi and Salazar-Allen (1990, Figs. 1–6); Sharp et al. (1994, Fig. 348 a–f). Figure A–F.
Habitat: On soil over rock near streams; 900 m.
Distribution in Central America: PANAMA. Chiriquí: Salazar‑Allen et al. 5113 (PMA).
World Range: North‑Central and South‑Central U.S.A.; Mexico; Central America.


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Bryum incrassatolimbatum Card., Rev. Bryol. 36: 114. 1909.

Protologue: Mexico. Etat de Jalisco: Etzatlan, [Pringle] (n. 15217). 

Plants medium- to robust-sized, green to yellow‑brown in deep tufts to 2 cm high; stems simple or rarely forked; rhizoids sparse at base, finely papillose. Leaves 1–2.5 mm long, erect-spreading, keeled, somewhat contorted when dry, erect‑spreading, concave when wet, ovate to broadly oblong, decurrent; apices obtuse to broadly acute; margins revolute below, plane above, bordered by 2–3 rows of enlarged and bulging, thin‑walled cells in multiple layers, entire; costae broad, subpercurrent to percurrent; upper cells rhombic to rectangular, thin‑walled and bulging, 40–90 μm long, basal cells rectangular, thin‑walled and bulging. Dioicous. Setae to 15 mm long, red‑brown. Capsules 2.3–2.7 mm long, brown, oblong‑pyriform, neck short, slender, suberect; annuli compound; opercula short‑conic; exostome teeth yellow below, hyaline above, endostome hyaline, basal membrane to ½ of exostome teeth length, segments broad, narrowly perforate, cilia rudimentary or absent. Spores (immature) 11–14 μm, lightly roughened. Calyptra not seen.


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