Grimmiaceae

Grimmiaceae
Schistidium apocarpum and Grimmia pulvinata
Systematics
Department : Moss (Bryophyta) Subdivision : Bryophytina Class : Bryopsida Subclass : Dicranidae Order : Grim Family : Grimmiaceae
Scientific name
Grimmiaceae
Arn.

The Grimmiaceae are the eponymous family of the moss - order Grimmiales. They are predominantly light-loving rock mosses that are often very resistant to drying out. Some species also prefer sandy spots.

features

The plants grow in dense cushions or lying down. The mostly lanceolate leaves consist of two cell layers in many species. The leaves almost always have a hair-like, drawn out chlorophyll-free leaf tip ("glass hair "), which means that the pillows of these mosses often shimmer gray or silver. These hairs serve to diffuse incident light. In the species that inhabit more shady locations, the glass hairs are often regressed.

The sporogons are terminal or on short side shoots. The capsule is recessed or stands on a short capsule stem and is ovoid to cylindrical. The peristome consists of 16 teeth.

Occurrence

The majority of the species prefer lime-free rock. On the other hand, only a few species, growing on mortar, also penetrate the city centers.

The family is distributed worldwide in the temperate zones including the high mountains. In the tropics they only inhabit the high mountains.

Genera

The family contains 10 genera with around 330 species in two subfamilies

• Subfamily Racomitrioideae
  • Bucklandiella , 58 species, worldwide
  • Codriophorus , 15 species, Holarctic
  • Niphotrichum , 8 species, temperate to arctic latitudes of the northern hemisphere, Macaronesia
  • Racomitrium , 14 species, worldwide

• Subfamily Grimmioideae
  • Aligrimmia , 1 species, Peru
    • Aligrimmia peruviana
  • Coscinodon , 10 species, Holarctic, South America, New Zealand, Antarctica
  • Coscinodontella , 1 species, Peru
    • Coscinodontella bryanii
  • Grimmia , approx. 110 species, worldwide
  • Leuroperichaetium , 1 species, Namibia
    • Leuroperichaetium eremophilum
  • Schistidium , 110 species, worldwide
    • Schistidium apocarpum

literature

• Jan-Peter Frahm , Wolfgang Frey : Moosflora (= UTB . 1250). 4th, revised and expanded edition. Ulmer, Stuttgart 2004, ISBN 3-8252-1250-5 .
• Jan-Peter Frahm: Biology of Mosses. Spectrum Akademischer Verlag, Heidelberg et al. 2001, ISBN 3-8274-0164-X .

Web links

• Pflanzenliebe.de Photos of different species of the Grimmiaceae

Commons : Grimmiaceae  - collection of images, videos and audio files

Individual evidence

1. ↑ Wolfgang Frey, Michael Stech, Eberhard Fischer: Bryophytes and Seedless Vascular Plants (= Syllabus of Plant Families. 3). 13th edition. Borntraeger, Berlin et al. 2009, ISBN 978-3-443-01063-8 , pp. 158-160.