Pohlia cruda (Hedw.) Lindb.

Opal thread-moss (en)

Species

Bryophytes > Bryales > Mniaceae > Pohlia

Characteristics

Plants large, loosely caespitose, yellow-green to hyaline green or occasionally reddish green, with distinct metallic lustre; terricolous or saxicolous. Stems (5-)10-30 mm long, dark red, infrequently branched, tomentum sparse, red-brown. Leaves larger above, forming comal tuft, erect-spreading wet, little altered dry; broadly lanceolate to elliptical, (1.2-)1.8-3.5 mm long, abruptly narrower at stem apex, spreading; margins ± plane, minutely serrate to denticulate near apex. Costa ending below apex or occasionally ± percurrent on some leaves; in section elliptical, guide cells 2, incrassate, occasionally with 1-2 ventral stereids, ventral surface cells slightly smaller than guide cells, weakly thickened, dorsal stereid band small, of 3-4 cells, generally with hydroids below guide cells, dorsal surface cells similar to ventral surface cells but more strongly thickened. Upper laminal cells mostly 8-14: 1, fusiform to linear-rhomboidal, vermicular, 80-150 x 10-12 µm; basal cells long-rectangular. Dioicous, autoicous or paroicous, but sporophytes infrequent. Penchaetia terminal, leaves linear, to 3 mm long. Seta 10-15 mm long, ± flexuose, yellow-brown; capsule inclined to horizontal, elliptical, 2.0-2.5 mm long, yellow-brown, neck short, inconspicuous; exothecial cells rectangular to rhomboidal, 2-4 rows at mouth smaller and 1-2 transversely rectangular; stomata at base of urn and on neck, phaneropore; annulus differentiated; peristome double, exostome teeth narrowly triangular, to 0.5 mm long, finely papillose, endostome with basal membrane to 1/3 height of teeth, segments fragile, ± irregular and cleft, not as high as teeth, cilia 2-3; operculum conic-apiculate; spores rounded, 25-30 µm, finely papillose, light brown.
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Images

Pohlia cruda unspecified picture

Distribution

Pohlia cruda world distribution map, present in South Africa

Identifiers

LSID 35120048
WFO ID wfo-0001157892
COL ID 4KWHT
BDTFX ID -
INPN ID 4887
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Bryum austrocrudum Pohlia cruda Webera depauperata Webera erythrocaulis Bryum synoicocrudum Bryum viridatum Pohlia erythrocaulis Webera longescens Bryum longescens Mnium crudum Webera cruda Webera cruda var. imbricata Webera cruda var. nivalis

Lower taxons

Pohlia cruda var. carinata Pohlia cruda var. densa Pohlia cruda var. minor Pohlia cruda var. oregonensis