Bucklandiella heterosticha
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Bucklandiella heterosticha |
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| ( Hedw. ) Bednarek-Ochyra & Ochyra |
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Buck Landi Ella heterosticha (synonym Racomitrium heterostichum .. (Hedw) Brid, German Ungleichästiges pips patens ) is a moss - kind from the family Grimmiaceae .
features
Bucklandiella heterosticha forms loose or dense, because of the glass tips, often gray on the surface and brown-black inside. The prostrate to ascending trunks are up to 6 centimeters in size and often richly branched and have numerous short lateral shoots. The leaves are lanceolate and gradually narrowed to the tip. The leaf margins are usually rolled back on both sides. When dry, the leaves are close-fitting and somewhat one-sided, but when moist, they are upright or slightly bent back. The glass tip is usually long, serrated, tortuous, and protruding upright to horizontally.
The simple rib extends to the tip of the leaf, is about 80 to 110 µm wide at the base and 50 to 65 µm wide at the top and indented continuously on the top. Below it is three- to four-layered with 5 to 9 larger ventral cells, in the middle part two- to three-layered and 4 to 8, above two-layered with 2 to 4 ventral cells.
The lamina cells are elongated at the base of the leaf and are rectangular with nodular, thickened walls, and at the top they are square to short rectangular. Leaf-wing cells are not or barely differentiated, and a basal leaf border (composed of hyaline smooth-walled cells) is not or only poorly developed.
The seta is 4 to 9 millimeters long, the capsule oblong-cylindrical and up to 3 millimeters long. The 250 to 380 µm long peristome teeth are undivided or two, rarely three-parted at the tip, the basement membrane up to 50 µm high. Spores are fine-black and 14 to 20 µm in size.
Demarcation and similar types
Bucklandiella heterosticha (as described here in the narrower sense) is considered a species of a group of similar and difficult to distinguish species and the delimitation of the species was also interpreted differently in the past. Today the Bucklandiella heterosticha agg. including Bucklandiella affinis , Bucklandiella macounii , Bucklandiella obtusa and Bucklandiella sudetica .
Distribution and location requirements
The range of the species includes Europe, the Atlantic islands Azores, Madeira, Canary Islands and Iceland as well as the west coast of North America.
It grows on moderately dry to fresh silicate rock in sunny to partially shaded locations of the lower to higher mountain range.
swell
- 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 .
- Bucklandiella heterosticha in www.eFloras.org - Flora of North America .
