Hygrohypnum luridum (Hedw.) Jenn.
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Authority
Hedenäs, Lars. 2003. Amblystegiaceae. Fl. Neotrop. Monogr. 89: 1--107. (Published by NYBG Press)
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Family
Campyliaceae
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Scientific Name
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Type
Type. Sweden. Swartz s.n. (G, lectotype, designated by Hedenäs & Geissler, 1999).
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Synonyms
Hypnum palustre Huds. ex Brid., Hypnum mandonii Mitt., Hygrohypnum palustre Loeske
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Description
Species Description - Plants medium-sized to small; green, yellowish green, or brownish. Stem irregularly and often sparsely branched; pseudoparaphyllia triangular; axillary hairs with 1-4-celled upper part, this hyaline when young. Stem leaves erect to erect-patent, straight or falcate (gradually curved), ovate or oblong-ovate, narrowing gradually or abruptly to acuminate to acute or sometimes obtuse apex, not plicate, concave, not or hardly decurrent; margin entire or near apex slightly and indistinctly denticulate; costa single or often forked or branched, ending 25-80% of way up leaf, often variable within the same plant, 42.0-105.0 µm wide near base when single; median laminal cells (29.5-)35.5-109.0 × 4.5-8.0 |nm, incrassate or slightly incrassate, eporose; alar cells rectangular or elongate-rectangular and slightly inflated in lower group, transverse-rectangular to short-rectangular in upper group; alar group well delimited, quadrate or short-rectangular, along basal margin of leaf, extending from margin (40-)50-65% of distance to leaf middle at insertion. Inner perichaetial leaves narrowing abruptly to short-acuminate apex, plicate. Exostome outside cross-striolate in lower part. Spores 14.5-21.0 µm, finely papillose.
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Discussion
Hygrohypnum luridum was found in Guatemala (Bartram, 1949; Jamieson, 1976), and is here reported from Colombia and Bolivia as well. Among other species normally found associated with running water or wet rocks, H. luridum is recognized by its ovate or oblong-ovate and distinctly concave stem leaves that narrow relatively shortly to an acuminate to acute or sometimes obtuse apex, and by its variously single, forked, or branched costa ending 25-80% of way up leaf (often varying in the same plant). The lower alar cells are slightly inflated, and the alar groups well delimited and quadrate or short-rectangular along the basal margin of the leaf.
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Distribution
Guatemala (1740-3500 m a.s.l.), Colombia (3300-3500 m), and Bolivia (2900 m). Widespread and often common in temperate to arctic areas in N America and Eurasia. Recently reported from Indonesia by Enroth & Ignatov (1999). Grows on rocks and boulders in brooks and rivers, as well as on wet rocks.
Guatemala Central America| Huehuetenango Guatemala Central America| Nariño Colombia South America| Colombia South America| Tolima Colombia South America| Bolivia South America|