Hedwigiaceae

Hedwigiaceae
Hedwigia ciliata
Systematics
Department : Moss (Bryophyta) Subdivision : Bryophytina Class : Bryopsida Subclass : Bryidae Order : Hedwigiales Family : Hedwigiaceae
Scientific name
Hedwigiaceae
Chimp.

The Hedwigiaceae are a family of mosses .

features

The mosses grow in dense lawns. The trunks are irregularly branched. The leaves stand densely like roof tiles. The leaves are broadly oval, hollow and have no rib. The perichaetial leaves are larger. The species are monoecious and self-fertilizing. The capsule is upright and has no peristome . The kalyptra is small and has the shape of a hat or cap. The sporogons are terminal and only appear to be lateral (pseudopleurocarp) due to the summit of side branches. The number of chromosomes is n = 10, 11, 21 or 22.

Distribution and occurrence

The main distribution of the species of this family is in the warm regions of the earth. However, three of the four genera can be found with individual representatives in Europe. The only Central European genus is Hedwigia . Braunia alopecura occurs only in a few places in the southern Alps and is considered a tertiary relic.

Hedwigiaceae grow mainly in dry locations under acidic conditions. They can be found on exposed silicate rocks, walls and roofs.

Systematics

There are four types:

• Hedwigia , 4 species, almost worldwide
  • Hedwigia ciliata
• Braunia , 22 species, Africa, Neotropic , some Asia and Europe
  • Braunia alopecura
• Hedwigidium , 1 species, Europe, worldwide tropical mountains, temperate southern hemisphere
  • Hedwigidium integrifolium
• Pseudobraunia , 1 species, western North America
  • Pseudobraunia californica

literature

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

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. 186-187.