Ditrichum flexicaule
| Ditrichum flexicaule | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
_9927.jpg)
Ditrichum flexicaule |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Ditrichum flexicaule | ||||||||||||
| ( Schwaegr. ) Hampe |
Ditrichum flexicaule ( Verbogenstieliges double hair moss ) is a moss - kind from the family Ditrichaceae .
Delimitation of Art
The species delimitation of the diverse moss is controversial. In 1985 Frisvoll separated Ditrichum gracile from Ditrichum flexicaule in the broader sense as an independent species. The description given here follows this and thus corresponds to Ditrichum flexicaule in the narrower sense - without D. gracile .
features
The moss usually forms denser, green to brownish-green, not shiny lawns. The stems are 1 to 4 centimeters high and usually rhizoid-tomentose below. The leaves, up to 3 millimeters long, are straight or bent, sometimes somewhat sickle-shaped and from the egg-shaped base they suddenly narrow into a long tubular awl tip. The leaf margins are entire or very weakly serrated at the tip. The strong rib, which extends into the tip of the leaf or protrudes, takes up about a third to a quarter of the leaf width at the base of the leaf. On the underside (dorsal) it is clearly bulging. The lamina cells are short-rectangular to rhombic at the top and rectangular in the lower leaf area.
The red seta is up to 2 centimeters long and more or less bent, the capsule upright to sloping, dark brown, cylindrical, up to 1.5 millimeters long, the lid conical to short beaked. The 300–450 µm long peristome teeth are split in two almost down to the short basement membrane. Spores are 9 to 12 µm in size and have fine papillae. The moss is diocesan . It rarely has any fruit. Brood bodies are unknown.
Compared to Ditrichum gracile , Ditrichum flexicaule differs in its mostly smaller growth and shorter leaves, the lamina cells, which are shorter in the lower leaf section, and the dorsally bulging leaf vein. Ditrichum flexicaule prefers drier locations.
Location claims and distribution
Ditrichum flexicaule grows in mostly lime-rich, but always base-rich locations, usually in sunny, dry and exposed places on earth and rock.
It occurs in Europe, Asia, North and Central America as well as New Guinea and New Zealand.
literature
- Jan-Peter Frahm , Wolfgang Frey : Moosflora (= UTB . 1250). 4th, revised and expanded edition. Ulmer, Stuttgart 2004, ISBN 3-8252-1250-5 .
- 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 .
