Ditrichum
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Ditrichum (German Doppelhaarmoose ) is a cosmopolitan genus of deciduous moss from the family Ditrichaceae .
features
Mosses of the genus Ditrichum are upright, simple or sometimes not very branched, loose or dense lawn-forming plants and grow on earth and rocks. The stem cross-section has a central strand. The moist, upright leaves are lanceolate to oblong from the ovoid base, the leaf margins entire or toothed above. The strong leaf vein takes up about a sixth to a third of the leaf width at the base. The usually smooth leaf cells are rectangular to linear below, rectangular to square above. Leaf-wing cells are not differentiated.
The spore capsule on the long seta is cylindrical, upright or inclined, the 16 peristome teeth are split or perforated down to the bottom into two thread-like legs. The capsule lid is conical or short beaked, the kalyptra is cap-shaped. Often rhizoid gems are formed, which are used for vegetative reproduction.
Systematics and types
Ditrichum is the most species-rich genus within the Ditrichaceae family . According to Stech & Frey it counts 69 species worldwide, according to other sources 85 to 90 species are given.
The following species are represented in Germany, Austria and Switzerland:
- Ditrichum flexicaule
- Ditrichum gracile
- Ditrichum heteromallum
- Ditrichum linear
- Ditrichum pallidum
- Ditrichum plumbicola
- Ditrichum pusillum
- Ditrichum zonatum
literature
- Jan-Peter Frahm , Wolfgang Frey : Moosflora (= UTB . 1250). 4th, revised and expanded edition. Ulmer, Stuttgart 2004, ISBN 3-8252-1250-5 .
- 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 .
- Martin Nebel, Georg Philippi (ed.): The mosses of Baden-Württemberg. Volume 1: General part, special part (Bryophytina I, Andreaeales to Funariales). Ulmer, Stuttgart 2000, ISBN 3-8001-3527-2 .
