Riccardia chamedryfolia

Riccardia chamedryfolia

The book term Riccardimoos ( Riccardia chamedryfolia ) is a autözisches ( antheridia and archegonia at different branches on the same plant ), thal löses liverwort.

Identifying

The creeping up slightly ascending thalli of Riccardia chamedryfolia are dark - to olive green in color. At the tips, they are often pale green. The irregularly shaped thalli are also 1 - to 3 -fold with pinnate times longer, sometimes wider, tongue-shaped Thallusästen that can be wide and 4 mm long and 1.5 mm. In the middle part they are about 4 to 8 cell layers thick. The base is generally relatively flat while the upper surface is convex. The Thallusränder stand out in contrast to Riccardia multifida by 0-1 series of hyaline cells. They appear when light is therefore not transparent. The Thallusspitzen are roundish. The epidermal cells are smaller than the cells on the inside and approximately 65 to 90 microns long and 25 to 50 microns wide. In almost all epidermal cells 1-3 brownish oil bodies are present. In addition to the short male twig there is even shorter female twigs that have cilia. The club-shaped calyptra is papillose. Likelihood of confusion especially with Riccardia multifida, which in the north of Germany, however, is rare.

Occurrence

The weak competitors, pioneer joyful liver moss grows in wet to moist, often rippled, base-containing, relatively low lime, shaded to semi- shaded locations of sources, waters edges, over rippled rocks, on tree roots and tree bases on earth, sand and humus, in base-rich fens and in Torfstichen. Rarely, it grows submerged in water edges. It often occurs as an initial moss ago in disturbed places and is rapidly overgrown by other mosses. The destruction of quelligen locations, the straightening of rivers, by water pollution and intensive agriculture, the type has declined in recent decades. In some states, the liverwort is on the red list.