Pseudobryum

(Kindberg) T. J. Koponen

Ann. Bot. Fenn. 5: 147. 1968.

Etymology: Greek pseudes, false, and genus Bryum, alluding to similarity
Basionym: Mnium subg. Pseudobryum Kindberg Eur. N. Amer. Bryin. 2: 338. 1898 (as Pseudo-Bryum)
Treatment appears in FNA Volume 28. Treatment on page 235. Mentioned on page 215, 216, 236, 658, 659.
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 TaxonIllustrator 
MniaPseudobryumCinclidioides.jpegPseudobryum cinclidioidesPatricia M. Eckel

Plants 3–10 (–15) cm, in loose mats. Stems brown, erect, simple or sometimes branched distally, not dendroid; rhizoids brown, macronemata mainly proximal, scattered distally, micronemata present. Leaves green or yellow-green, dark-brown when old, crisped and weakly contorted when dry, erect or erect-spreading, often weakly undulate when moist, broadly ovate, elliptic, or sometimes orbicular, (3–) 4–6 (–7) mm; base not or short-decurrent; margins plane, green or yellow-green, 1-stratose, entire or lightly toothed to below mid leaf, teeth single, blunt or sometimes rounded; apex rounded, obtuse, or rarely retuse, apiculate; costa subpercurrent, ending well before apex, or rarely percurrent, distal abaxial surface smooth; medial laminal cells elongate, often ± rhomboidal, usually 3+:1, (30–) 40–80 (–110) µm, in diagonal rows, not collenchymatous, walls pitted; marginal cells indistinctly differentiated from medial cells, short-linear or rhomboidal, in 1–2 (–3) rows. Specialized asexual reproduction absent. Sexual condition dioicous. Seta single or rarely double, orange-yellow, 2–5.5 cm, flexuose. Capsule pendent, yellowish-brown, ovate, 2–2.5 mm; operculum conic-apiculate; exostome dark-brown; endostome yellowish-brown. Spores 31–40 µm.

Distribution

North America, Eurasia, circumtemperate to circumboreal

Discussion

Species 2 (1 in the flora).

Pseudobryum consists of two species of which one (P. cinclidioides; n = 6) is in the flora area and the other [P. speciosum (Mitten) T. J. Koponen; n = 7] is Asiatic. The latter is differentiated also by leaf characters and polysety.

Selected References

None.

... more about "Pseudobryum"
blackish +, orange-yellow +, reddish-brown +, yellowish-brown +, yellowish green +, red +, brown +  and yellow +
retuse +, obtuse +  and rounded +
Terry T. McIntosh +  and Steven G. Newmaster +
(Kindberg) T. J. Koponen +
short-decurrent +
not +  and decurrent +
Mnium subg. Pseudobryum +
cucullate +
yellowish-brown +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
undifferentiated +
2 +  and 1 +
nodulose +
subpercurrent +
toothed +
North America +, Eurasia +  and circumtemperate to circumboreal +
yellowish-brown +
Greek pseudes, false, and genus Bryum, alluding to similarity +
lanceolate-acuminate +
crowded +  and distant +
elliptic +  and contorted +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
dark-brown +, yellow-green +  and green +
erect-spreading +  and erect +
orbicular +, ovate +, undulate +  and crisped +
larger +  and small +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
yellow-green +  and green +
toothed +, entire +  and plane +
dioicous +, sexual +  and asexual +
rhomboidal +  and short-linear +
rhomboidal +  and elongate +
rostrate +, mammillate +, apiculate +, hemispheric +  and conic +
Ann. Bot. Fenn. +
smaller +  and larger +
orange-yellow +
flexuose +
rarely +  and single +
elongate +
2 cm20 mm <br />0.02 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
spheric +
not dendroid +, branched +  and simple +
Pseudobryum +
Mniaceae +
rounded +  and blunt +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +