Bryum caespiticium Hedw.

Dry calcareous bryum moss (en)

Species

Bryophytes > Bryales > Bryaceae > Bryum

Characteristics

Plants small to medium-sized, caespitose, yellowish green or reddish green above, brownish below; terricolous. Stems 5-15 mm tall, frequently branching by subperichaetial innovations, densely tomentose below, red to reddish brown; rhizoids red-brown, coarsely papillose, tubers absent. Leaves frequently in successive comal tufts, smaller below, frequently concave, imbricate to erect, slightly twisted when dry, erect to erect-spreading when wet; oblong-lanceolate to ovate-lanceolate or ovate-oblong (1.1-)1.5-2.3(-2.7) mm long; apex acuminate; margins generally recurved to re volute, entire to denticulate at apex; border indistinct. Costa long-excurrent, awn 0.2-0.8 mm long, entire to denticulate above, reddish below; in section subround to round, laminal insertion ventral, ventral stereid band absent, ventral surface cells present, dorsal stereid band strong, stereids in 3-5 rows, dorsal surface cells incrassate, hydroids present between guide cells and stereid band. Upper laminal cells rhomboidal, infrequently pitted, (35-)40-67(-73) µm long, (10-)12-15(-19) µm wide, narrower towards margin; basal cells rectangular, frequently reddish below, pitted. Dioicous. Perichaetia terminal, leaves lanceolate to triangular. Seta 13-30 mm long, yellowish to reddish to reddish brown; capsule pendulous, oblong-cylindrical to clavate, yellowish to yellowish brown or reddish brown, frequently contracted below mouth when dry, urn 1-2 mm long, neck wrinkled when dry, 0.5-1.2 mm long; exothecial cells irregular rectangular, incrassate, smaller towards mouth, 1-3 rows at mouth transversely elongated; stomata on neck, phaneropore; peristome double, exostome teeth narrowly oblong-acuminate, yellowish, hyaline above, finely papillose, endostome segments tapering above, perforated, cilia 2-3, appendiculate, basal membrane high, yellowish or hyaline, smooth or minutely papillose; operculum conic, apiculate; calyptra cucullate; spores yellowish brown, 15-28 µm, minutely papillose.
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Foliage retention deciduous
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Hardiness (USDA) 6-11

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Images

Bryum caespiticium unspecified picture

Distribution

Bryum caespiticium world distribution map, present in United States of America and South Africa

Identifiers

LSID 35116780
WFO ID wfo-0001156301
COL ID NK3M
BDTFX ID -
INPN ID 5721
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Bryum arenicola Bryum austrobimum Bryum caespiticium Bryum congestum Bryum microcephalum Bryum mosquense Bryum radianii Bryum sellae Bryum sinensicaespiticium Bryum subcapillatum Bryum submuticum Bryum symblepharum Bryum synoicocaespiticium Bryum vancouveriense Bryum subgemmuliferum Bryum subpilosum Bryum bakonyense Bryum cernuum

Lower taxons

Bryum caespiticium subsp. brevimucronatum Bryum caespiticium subsp. culmannii Bryum caespiticium var. badium Bryum caespiticium var. propinquum Bryum caespiticium var. rubricaule Bryum caespiticium var. submarginatum Bryum caespiticium var. tettyense