In continuing your browsing of this site, you accept the use of cookies to offer you suitable content and services and realize visits statistics.Learn more about cookies.
Petite plante très discrète, herbacée vivace rhizomateuse formant de petits gazons. Feuilles basales réduites à des gaines, sauf la dernière à petit limbe développé et linéaire de 5-20 mm. Tige sillonnée portant un épillet terminal de 2-3 mm, sans bractée. Périgone à 0-3 soies plus courtes que le fruit mur.
Détermination
Moyennement difficile.
Espèces proches
Trichophorum alpinum possède un périgone à longues soies blanches formant une houppe (soies courtes et brunâtres ou absentes chez T. pumilum). T. caespitosum est une espèce cespiteuse (formant des touffes), a un épi de 3-6 mm et un périgone portant plus de 3 soies plus longues que le fruit (T. pumilum est une plante rhizomateuse gazonnante, a un épi de 2-3 mm et 0-3 soies plus courtes que le fruit). Les Isolepis ont plusieurs épis ou un seul mais non terminal (un seul épi terminal chez Trichophorum). Les Eleocharis n’ont aucune feuille à limbe développé (feuille supérieure à limbe court mais développé chez Trichophorum).
Période d’observation
Floraison entre juin et juillet.
Biologie - éthologie
Espèce d’hémicryptophyte rhizomateuse (herbacée vivace) appartenant à la grande famille des Cyperaceae. Elle comporte plus de 100 genres dont les Carex sont les plus importants. Mais contrairement à eux, les Trichophorum (et d’autres genres) ont des fleurs hermaphrodites. Ils sont proches des Eleocharis (Scirpes) et des Eriophorum (Linaigrettes). Trichophorum pumilum est une espèce anémogame et barochore.
Biogéographie et écologie
Espèce holarctique : Disséminée en Europe (surtout Alpes et Europe du Nord), Asie centrale, Sibérie, Amérique du Nord. Trichophorum pumilum vit dans les tourbières, les berges de lacs, bords de torrents et bas-marais sur substrats plutôt basiques aux étages montagnard à alpins (1600-2500m)
Sources Tison J.-M., De Foucault B. (coords). 2014. Flora gallica - Flore de France. Ed. Biotope (Mèze), 1196p.
The map presents a summary at the 10 x 10 km grid of the observation data for the species transmitted to the SINP. These data have been subjected to validation filters.
Distribution map from the Atlas of Departmental Biodiversity and Marine Sectors program
Current distribution in metropolitan France
The map presents a reference distribution layer of the species at the scale of departments and marine sectors. The presence and absence data were established by expertise within a network of partners. This reference distribution is used in the validation process of the SINP data at the INPN level.
Distribution map from the Atlas of Departmental Biodiversity and Marine Sectors program
Certain presence
Corresponds to a report on the basis of at least one observation proved within a period of 10 years (20 years for little-known invertebrates) preceding the year and no presumption of extinction since obtaining the last data nor doubt on reproductive and implemented nature of this population. For migratory species, the presence indicated concerns areas of reproduction.
Probable presence
This status is based on one or more of the following criteria:
search of species incomplete but presence of supportive environments;
ecology of the species consistent with the hypothesis of his presence;
the last reliable sighting is older than 10 years compared to the reference date, no recent specific research and no presumption of extinction from that date [vertebrates, invertebrates and plants well studied (rhopalocera, grasshoppers, dragonflies ...)] ;
the last reliable observation being older than 20 years, no recent specific research and no presumption of extinction from that date [poorly known taxa: fungus, many invertebrates...].
Probable or certain absence
This point covers the absence, more difficult by nature to demonstrate than presence. This status is based on one or more of the following criteria:
intensive but unsuccessful targeted research;
lack of adequate environments;
unobserved species while its presence is easily detected;
unlikely presence for historical or biogeographical reasons.
This status must be assigned to a department in which the presence of the species is casual.
Absence due to a proven extinction
Particular case of absence due to a proven extinction less than a half century ago (older disappearances are treated as "no probable or definite").
No information
In the state of knowledge, we can not comment on the presence or absence in the current department. This is the default status when not comprised in one of the previous categories or whenever there is doubt.