Grimmia
Grimmia pulvinata
Grimmia is a genus of mosses of the family Grimmiaceae.
Features
The 5-40 (70 ) mm tall plants form loose grass to dense cushions. The leaves are oblong - ovate to lanceolate, often tongue-shaped, concave or keeled, have a well-trained reaching up to the blade tip midrib, further flat, inwardly curved or recurved leaf margins and often a glass top. The lamina is einzellschichtig to mehrzellschichtig. Leaf cells at the leaf base shorter or longer rectangular, but never barbed -like thickened as in Racomitrium species. The cells in the center of the page are roundish - square and usually thick-walled.
The species are dioecious or autoecious ( antheridia and archegonia at different branches on the same plant ). Propagules are formed at a part of the species. The short to long Seta is erect or bent, the spore capsule erect to pendulous, the calyptra hats or hat -shaped. The columella ( central column in the spore capsule ) remains in the capsule, and is not connected to the capsule cap.
Dissemination
The genus Grimmia is widespread on all continents. Most species prefer dry and temperate to cold climates and are rock dwellers.
Systematics and species ( selection)
The data on the number of species vary depending on the data source of 95 to 160 after piercing & Frey worldwide there are about 110 species.
In Germany, Austria and Switzerland, the following species occur:
- Grimmia alpestris
- Anodon Grimmia
- Grimmia anomala
- Grimmia arenaria
- Grimmia atrata
- Grimmia caespiticia
- Grimmia crinita
- Grimmia decipiens
- Grimmia dissimulata
- Grimmia donniana
- Grimmia elatior
- Grimmia elongata
- Grimmia funalis
- Grimmia fuscolutea
- Grimmia hartmanii
- Grimmia incurva
- Grimmia laevigata
- Grimmia longirostris
- Grimmia mollis
- Grimmia montana
- Grimmia muehlenbeckii
- Grimmia orbicularis
- Grimmia ovalis
- Grimmia plagiopodia
- Grimmia pulvinata
- Grimmia ramondii
- Grimmia reflexidens
- Grimmia teretinervis
- Grimmia Tergestina
- Grimmia torquata
- Grimmia trichophylla
- Grimmia triformis
- Grimmia unicolor