Bach short rifle moss

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Bach short rifle moss
Brachythecium rivulare IMG 3110.jpg

Bach short rifle moss ( Brachythecium rivulare )

Systematics
Class : Bryopsida
Subclass : Bryidae
Order : Hypnales
Family : Brachytheciaceae
Genre : Brachythecium
Type : Bach short rifle moss
Scientific name
Brachythecium rivulare
Chimp.
tree-shaped branching

The brook short rifle moss ( Brachythecium rivulare ) is a deciduous moss species from the Brachytheciaceae family .

features

The Bach short rifle moss forms strong, loose, yellow-green to pale green, shiny lawns. The ascending to upright secondary stems arise from the creeping, defoliated primary stems. These are usually tufted or branched in the shape of a tree and have densely, loosely attached leaves. The stem leaves of these secondary shoots are about 2 to 2.5 millimeters long, triangular-egg-shaped, pointed, more or less longitudinally folds, with a flat edge, especially in the upper half of the leaf, and the leaf wings that run down the stem. The leaf vein extends over the middle of the leaf. Branch leaves are smaller, narrower and less sagging than stem leaves.

The leaf cells are thin-walled, linear, 6 to 10 µm wide and 64 to 128 µm long in the middle of the leaf, shorter and wider at the base of the leaf, weakly spotted. The leaf wing cells are dilated, elongated rectangular to six-sided, hyaline and form a well-defined group.

The moss is diocesan . Sporophytes are seldom formed, they have a red, warty, rough, 2 to 2.5 cm long upright seta , a sloping to horizontal, curved, elongated capsule with a conical, finely-pointed lid. Spore ripening time is from autumn to spring.

Possibility of confusion

Brachythecium rivulare can easily be confused with the closely related and very similar species Brachythecium rutabulum . Brachythecium rivulare differs from it in its upright, tree-shaped growth, the clearly separated and descending leaf wing cells and the somewhat differently shaped leaf tips: in Brachythecium rivulare the leaf edges below the tip are straight or slightly curved outwards, Brachythecium rutabulum here has inwardly curved edges .

Occurrence and location requirements

This type of moss is found almost worldwide, especially in the northern, rarely in the southern hemisphere. In Central Europe it is widespread in the limestone mountains, but also occurs in areas with little limestone. It is less common on the plain.

As a hygrophyte , it grows preferentially in flowing waters and in springs on rock in light to partially shaded locations, also on moist forest soil, on tree roots and in wet meadows.

literature

Web links

Commons : Brachythecium rivulare  - album with pictures, videos and audio files