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Published In: Prodrome des Cinquième et Sixième Familles de l'Aethéogamie 75. 1805. (Prodr. Aethéogam.) Name publication detail
 

Project Name Data (Last Modified On 2/24/2011)
Acceptance : Accepted
Project data     (Last Modified On 2/24/2011)
Discussion:

Although M. marginatum is considered a lowland species in the Northern Hemisphere (Koponen, 1980), in Central America it is known only from a few high-elevation localities in Guatemala. Central American collections of M. marginatum have both paroicous and synoicous inflorescences and while its capsules are unknown in the region some collections have old, battered setae. Mature plants of M. marginatum have leaves with dark‑red leaf limbidia, doubly serrate margins, and firm‑walled, rounded‑hexagonal leaf cells. Care should be used when examining young plants, however, because their leaves can be nearly entire, have thin‑walled cells and costae that end well below the apex.

Illustrations: Bridel (1803, Fig. 1 a–d); Hooker and Taylor (1818, Pl. 31); Bruch and Schimper (1838a, Pl. 391); Husnot (1890, Pl. 70 1–5); Dixon and Jameson (1896, Tab. 47A) Grout (1906, Pl. 51 1–16); Bartram (1933, Fig. 93 a–d); Grout (1940, Pl. 105 1); Bartram (1949, Fig. 83 E–F); Nyholm (1958, Fig. 144B); Lawton (1971, Pl. 105 7–12); Flowers (1973, Pl. 86 1–8); Gangulee (1974, Fig. 504); Koponen (1974, Figs. 22–27); Smith (1978, Fig. 209 1–4); Koponen (1980, Figs. 21–23); Crum and Anderson (1981, Fig. 271 A–E); Ireland (1982, Pl. 190 1–8); Li (1985, Fig. 81 7–9); Nyholm (1993, Fig. 194 B); Sharp et al. (1994; Fig. 400 a–d); Abramov & Volkova (1998, Pl. 66 9–12). Figure 175.
Habitat: On soil and bare rocks around streams and waterfalls, also on bank in meadow; 2700–3900 m.
Distribution in Central America: GUATEMALA. Huehuetenango: Steyermark 48399 (F); San Marcos: Steyermark 35713 (F).
World Range: Subarctic America, Western Canada, Eastern Canada, Northwestern, North-Central, Northeastern, Southwestern, South‑Central, and Southeastern U.S.A.; Mexico; Central America; Northern, Middle, East, Southwestern, and Southeastern Europe; Siberia, Russian Far East, Caucasus, Middle Asia, Mongolia, China, Western Asia; Northern Africa; Indian Subcontinent; North‑Central Pacific.

 

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Mnium marginatum (With.) P. Beauv., Prodr. Aethéogam. 75. 1805.

Bryum marginatum With., Syst. Arr. Brit. Pl. (ed. 4) 3: 824. 1801. Astrophyllum marginatum (With.) Lindb., Musci. Scand. 14. 1879. Protologue: Scotland. Pastures, Scotland [Dickson]. Lectotype (Koponen 1980). Scotland, "Bryum marginatum N", sheet 32, no. 28, Dickson.

Mnium serratum Brid., Muscol. Recent. 2(3): 84. 1803. Protologue: Europe. Ad rupes fyluaticas Ducatus Brunswicenfis, vbi Schraderus primus omnium legit, circa Ienam in rupestribus, vbi amicus Blabel inuenit, in Alpibus Sanenfibus Heluetiae, vbi primus noftratium reperi, forte et in Scotiae pascuuis, faftigiatim habitat.  Lectotype (Koponen 1980). “Systematische Sammlung Cryptogamischer Gäwächse, Fasc. 1 no. 68, Schrader.”

Plants slender to medium-sized in loose tufts, dark‑green to yellow‑green. Stems erect, to 3 cm high, simple; reddish macronemata at base. Leaves crisped and contorted when dry, spreading when wet, 2–3 mm long, elliptic to oblong‑ovate; apices long‑apiculate; margins doubly serrate above (the teeth often reduced or absent below), border bistratose with linear, usually reddish cells; costae stout, smooth at back, subpercurrent or confluent with border; upper cells 20–35 μm, hexagonally rounded to oblong‑hexagonal, with walls distinctly thickened at the corners, firm‑walled, not porose. Paroicous or synoicous. Capsules not known from Central America. “Setae single, orange‑yellow or reddish at least below, 13–25 mm long; capsules 1.5–3.5 mm long, oblong‑cylindric from a short neck, yellow‑brown, nearly horizontal to pendulous; opercula stoutly and obliquely rostrate; stomata immersed, in the neck; exostome teeth brownish or golden‑brown, with segments perforate and cilia mostly in 3's but sometimes in 2's and 4's. Spores 22–32 μm, finely papillose. Calyptrae brown, smooth.” (Crum & Anderson 1981).

 

 

 
 
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