Niphotrichum
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Niphotrichum canescens |
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| (Bednarek-Ochyra) Bednarek-Ochyra & Ochyra |
Niphotrichum is a genus of deciduous mosses from the subfamily Racomitrioideae within the family Grimmiaceae . The name is derived from the Greek nipha, snow and trichos, hair and refers to the pronounced glass tips of the leaves.
features
The small to large plants form loose to dense, green, yellow to gray-green or yellow-brown lawns. The creeping to more or less upright trunks are few to richly branched and often have numerous short side shoots. The dry, moist, upright to sparsely protruding leaves are triangular, elliptical or broadly ovate-lanceolate, in the upper part blunt to sharply keeled or trough-shaped, short to long-pointed, sometimes blunt. Mostly they are equipped with a strong, papilla-free and toothed glass tip. The single-layered leaf margins are bent back on both sides to the middle of the leaf or to the tip. The simple rib extends to the middle of the leaf or to the tip of the leaf, is often branched at the upper end, strongly flattened on the underside (dorsal) and two-celled or three-celled at the base.
Basal lamina cells are elongated to linear and have bulky, nodular walls. The leaf wings with mostly enlarged, thin-walled, hyaline to yellowish cells form convex and often sloping ears. Above the leaf wing there are hyaline or yellowish, square to rectangular, non-bulged and smooth cells on the edges. In the middle and upper area of the leaf, the cells are square to slightly rectangular, bulged and heavily papillary, with the large, thick and conical papillae on both sides above the cell lumen.
The seta is yellowish to black-red, upright, smooth, the capsule ovate to cylindrical, the lid very long sub-like. The peristome teeth are almost as long as the urn or longer, red-brown and almost to the base divided into two, rarely three, thread-like, densely papillary branches. The kalyptra is warty on top, the spores are finely papilose.
distribution
The genus has its distribution area in the temperate to arctic zones of the northern hemisphere.
Systematics
The genus Niphotrichum was (as well as two other genera, Bucklandiella and Codriophorus ) by Ochyra et al. 2003 split off from the genus Racomitrium (in the former broader sense). This division is currently only partially implemented in various floras; In the list of species below, the former species names that are currently still often used are therefore also given in brackets.
Worldwide there are 8 species belonging to the genus Niphotrichum . Species found in Germany, Austria and Switzerland are:
- Niphotrichum canescens (Racomitrium canescens)
- Niphotrichum elongatum (Racomitrium elongatum)
- Niphotrichum ericoides (Racomitrium ericoides)
swell
- 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 .
- Niphotrichum in www.efloras.org .
Individual evidence
- ↑ Jan-Peter Frahm , Wolfgang Frey: Moosflora (= UTB . 1250). 4th, revised and expanded edition. Ulmer, Stuttgart 2004, ISBN 3-8252-1250-5 , p. 159.