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.

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"
Terry T. McIntosh +  and Steven G. Newmaster +
(Kindberg) T. J. Koponen +
Mnium subg. Pseudobryum +
North America +, Eurasia +  and circumtemperate to circumboreal. +
Greek pseudes, false, and genus Bryum, alluding to similarity +
Ann. Bot. Fenn. +
Pseudobryum +
Mniaceae +