Musci


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Musci

[′mə‚sī]
(botany)

Musci

 

(also Bryatae), a class of spore-producing plants, or mosses, of the division Bryophyta. In contrast with other mosses, these are divided into a stem and leaves. The Musci comprise three subclasses—Sphagnidae, Andreaeidae, and Bryidae. They are annuals or, more frequently, perennials. Their development begins from spores from which germinates a lamelliform or, more often, branched, threadlike protonema with buds. The buds develop into green stems, which measure between a few millimeters and 0.5 m long; they have rhizoids and spirally arranged leaves. At the tip of the stem or on the lateral shoots there are female and male sex organs—the archegonia and antheridia. Fertilization occurs in the egg cell in the archegonium. The zygote develops into a sporophyte in the form of a sporogonium, consisting of a capsule with a spore case and, frequently, a mouth. The Musci also reproduce vegetatively.

Mosses of the class Musci are found on mountains and plains throughout the world, primarily in the tundra, forests, marshes, and the alpine mountain belt. Of the approximately 15,000 known species, more than 1,500 grow in the USSR. The most common mosses in forests are Polytrichum, Dicranum, and Mnium; in marshes, Sphagnum; in water, Fontinalis; and on rocky cliffs, Andreaea and Grimmia.

I. I. ABRAMOV

References in periodicals archive ?
Molecular phylogeny of the suborder Leucodontineae (Musci; Leucodontales) inferred from rbcL sequence data.
Musci and team investigated how depressive and anxious symptoms may be precursors to binge eating behaviors and suicidal outcomes in 313 black females followed for 11 years, from the ages of approximately 6-17 years old.
MUNOZ, J., 1999.--A revision of Grimmia (Musci, Grimmiaceae) in the America.
(10.) Musci SI, Fine EM, Togo Y: Zoster-like disease in the newborn due to herpes simplex virus.
Muscat, May 30 (ONA) The Royal Army of Oman (RAO) Musci Band, represented by Al Hamasiyah Band, Bagpipes and Drums Band will take part in World Tattoo Parade in the Sultanate of Brunei Darussalam due to commence its activities tomorrow (Tuesday) and continues till June 3rd.
El ultimo articulo es el de Monica Musci, quien prescinde de la ficcion para adentrarse en las noticias periodisticas.
Whereas, the class names Hepaticae, Anthoceratae, and Musci were employed by Smith (1955) and Schofield (1985), respectively.
A revision of the genus Crossomitrium (Musci: Hookeriaceae).
In their study to determine the prevalent of sleep disorders in patients on dialysis, Musci et al.