Rhodobryum commersonii (Schwägr.) Paris

Species

Bryophytes > Bryales > Bryaceae > Rhodobryum

Characteristics

Plants large to robust, gregarious, green above, brownish below; terricolous or humico-lous. Stems frequently erect from rhizomes, to 50 mm tall, simple or occasionally branching by subperichaetial innovations, red-brown, tomentose below; rhizoids reddish brown, papillose. Leaves crowded or loosely rosulate above, distant and smaller below, erect dry, wide-spreading to squarrose wet, undulate and slightly twisted dry, flat to weakly undulate above wet, obovate, 7-15 mm long; apex acute to obtuse; margins plane above, plane to occasionally recurved below, denticulate to dentate above; border 1-3 cells wide. Costa subpercurrent to short excurrent, frequently reddish; in section subrectangular, laminal insertion ventral, ventral cells in 3-5 rows, dorsal stereid band absent, dorsal cells thin-walled, occasionally incrassate dorsally, hydroids present in centre of costa. Upper laminal cells rhomboidal to hexagonal, pitted, (40-)67-100(-135) µm long, (30-)33-45(-58) µm wide; basal cells rectangular, pitted, occasionally reddish below. Filamentous gemmae absent. Dioicous, infrequently polysetaceous. Perichaetia terminal, leaves lanceolate or triangular. Seta 30-57 mm long, yellowish or reddish or reddish brown; capsule horizontal to pendulous, curved, oblong-cylindrical, contracted below mouth dry, brown or reddish brown, urn 4.5-6.0 mm long, neck wrinkled dry, 1.2-2.0 mm long; exothecial cells irregular in shape, smaller at mouth, incrassate; peristome teeth oblong-acuminate or lanceolate, yellowish brown below, hyaline above, trabeculate, finely papillose, endostome segments keeled, broad below, tapered above, broadly perforated, cilia 2, appendiculate, basal membrane high, yellowish, minutely papillose; spores round, 14-18 µm, minutely papillose.
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Foliage retention deciduous
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Mature height (meter) 0.05
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Cultivation

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Distribution

Rhodobryum commersonii world distribution map, present in South Africa

Identifiers

LSID 35131430
WFO ID wfo-0001163981
COL ID 6X6Q7
BDTFX ID -
INPN ID 726959
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Rhodobryum commersonii Rhodobryum laxiroseum Mnium commersonii Rhodobryum madurense Bryum laxiroseum