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# 145
In garden:
moss garden

wall screw moss # 145

General facts

botanical name: Tortula muralis
english name: wall screw moss
dutch name: gewoon muursterretje
family: Pottiaceae
genus: Tortula
this plant is a moss
wikipedia link: http://en.wikipedia.org/wiki/Moss
more info link: http://en.wikipedia.org/wiki/List_of_the_mosses_of_Britain_and_Ireland

Plant facts

biotope: wasteland
soil quality: concrete
introduced into the garden at: 2011-03-06 as a by itself
blooming time: March
seed harvest time: April


tortula muralis research
date: 2011-04-10
This bryophyte (liverworts, hornworts and mosses), belongs to the class Bryopsida. Also referred to as the joint-toothed mosses, the Bryopsida account for 95% of all moss species. The common name refers to the fact that the peristome teeth found on the sporangium of these mosses are made from fragments of whole cells.

This particular moss, Tortula muralis, has a wide distribution and can be found on all but one continent. This incredible range is due in part to an ability to tolerate desiccation (water loss). Ectohydric mosses such as Tortula muralis rely on external water conduction. Mosses are in constant equilibrium with their habitat. Water is travelling in and out of cells depending on the available moisture in the environment, a condition known as poikilohydry. Several physical features help this moss retain water in low-moisture environments (such as brick walls), including leaf extensions (awns) which reflect light & increase the laminar boundary layer and very dense, short growth.


physical description of the species Tortula Muralis
date: 2011-03-10
Leaves ovate or elliptic to obovate , apex broadly acute to rounded or emarginate , short- to long-awned, margins narrowly recurved or revolute to near apex, commonly bordered distally with 2-4 rows of thicker-walled, papillose to smooth cells ; costa long-excurrent, lacking an adaxial pad of cells, distally narrow, 3-4(-6) cells across the convex adaxial surface; distal laminal cells hexagonal, 10-15 µm wide, 1:1, strongly papillose with 2(-4) -fid papillae. Sexual condition autoicous . Sporophytes exerted. Seta 0.6-1.5 cm. Capsule stegocarpic, not systylius , cylindric , erect and nearly straight, urn 1.5-2.7 mm; peristome 300 µm, teeth of 32 filaments twisted 1/2-2 times, basal membrane low, to 50 µm; operculum 0.6-1 mm. Spores 8-12 µm, spheric, finely papillose or essentially smooth. Capsules mature spring-summer.
Tortula muralis, T. brevipes, and T. plinthobia form an apparently intergrading cline in sporophyte characters, sexual condition, and elaboration of the leaf border . There may be evolutionary advantages associated with such variability, but specimens are occasionally difficult to name satisfactorily. The laminal border of 2-4 rows of thicker walled cells is usually hidden in the margin recurvature except at the leaf apex.