Thuidium recognitum
kilt fern moss, lesser tamarisk-moss, thuidium moss
leaves ± incurved basally and wide-spreading apically when dry, spreading with reflexed apices when moist, broadly ovate, distinctly plicate, 1 mm;
margins plane at least when removed from stem, rarely ± revolute proximally, papillose-serrulate, more strongly so in acumen;
apex abruptly acuminate;
costa nearly filling acumen but disappearing near apex;
distal laminal cells rhombic to oblong-rhombic, to 24 × 8–10 µm.
apical cell truncate, multipapillose.
2–4.2 cm.
2–3.5 mm;
operculum 0.7–1 mm, long-conic or bluntly short-rostrate;
endostome cilia in groups of 2 or 3.
11–16 µm, smooth or nearly so.
branch leaves to 0.5 mm;
costa shorter.
branch leaves 0.2 mm;
apex acute;
costa 1/3–2/3 leaf length.
leaves to 4.2 mm, margins denticulate, sometimes dentate or notched near base of acumen.
Thuidium recognitum
The specific epithet of Thuidium recognitum was applied by Hedwig because he recognized the many differences that separate the species from T. delicatulum: stem leaves that are shortly, broadly, and abruptly acuminate and plicate, with margins plane or nearly so; costa spreading out and nearly filling the acumen; stem leaf apices wide-spreading from an arched and incurved base; perichaetial leaves eciliate; paraphyllia papillose at or near cell ends; and operculum not or only shortly and bluntly rostrate. The secondary branch leaves of T. recognitum are erect-spreading when dry or moist and have rhombic distal laminal cells, 8–12 × 8–10 µm, that are thick-walled and stoutly 1-papillose with papillae somewhat curved.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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