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.
 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 />) +