Carex microglochin Wahlenb. ( Laîche à petite arête )


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Carex microglochin Wahlenb. ( Laîche à petite arête )

Carex microglochin Wahlenb. ( Laîche à petite arête )


Nom : Carex microglochin Wahlenb. ( Laîche à petite arête )

Autre(s) nom(s) :
Laîche à petite arête.

Famille : CYPERACEAE

Floraison : Juin – Août

Forme biologique :
Géophyte rhizomateux.

Protection :
– Liste des espèces végétales protégées sur l’ensemble du territoire français métropolitain Article 1
– Liste rouge française IUCN 2012 VU

Description :
La hauteur de la plante varie de 5 à 10 cm. Ce carex est très discret. La tige est trigone. Les feuilles filliformes n’atteignent quasiment pas la moitié de la tige. Leur gaine basale est de couleur brun pâle. Il présente un épillet mâle au sommet avec 5 à 6 épillets femelles en dessous. Les utricules sont de couleur fauve et de forme lancéolée. Ils sont réfléchis à maturité donnant l’allure d’une flèche à ce carex.

Usages / particularités :
Il se distingue de Carex davalliana par le nombre de stigmates (3 au lieu de 2 chez C. davalliana) et par sa tige lisse (rude chez C. davalliana).

Répartition française :
En France, cette espèce est très rare. Les stations présentent assez peu d’individus.

Présent dans le(s) département(s) suivant(s) :
Alpes-de-Haute-Provence, Alpes-Maritimes, Hautes-Alpes, Haute-Savoie, Savoie.

Répartition mondiale :
Elle est présente en Europe (Alpes), en Amérique du Nord, au Groënland et Asie centrale et boréale.

Carex microglochin Wahlenb. ( Laîche à petite arête )

Carex microglochin Wahlenb. ( Laîche à petite arête )


Ecologie :
L’espèce se trouve dans les milieux pionniers des bords de cours d’eau, lacs et sources, au dessus de 2 000 m. On la retrouve parfois en compagnie du Carex bicolor.

Phytosociologie :

Alliance Ordre Classe
Caricion incurvae Caricetalia davallianae Scheuchzerio palustris-Caricetea fuscae
Communautés surtout subalpines à alpines ; Alpes essentiellement. Communautés de bas-marais alcalins à mésotrophes, sur sol neutro-basique, tourbeux à minéral. Végétation hygrophile de bas-marais, à dominance d’hémicryptophytes, collinéenne à alpine, sur sol tourbeux, paratourbeux ou minéral, oligotrophe à mésotrophe.

Taxonomie :
Carex microglochin Wahlenb. a pour synonymes (Informations issues de la BDTFX Version 2.0, Tela Botanica) :
– Carex aristata Clairv.
– Caricinella microglochin (Wahlenb.) St.-Lag.
– Uncinia europaea J.Gay
– Uncinia microglochin (Wahlenb.) Spreng.

Bibliographie :

  • Atlas de la flore des Hautes-Alpes ; E. Chas ; Conservatoire botanique national alpin de Gap-Charance 1994
  • Atlas des plantes rares ou protégées des Hautes-Alpes ; Collectif, Société Alpine Protection Nature ; Naturalia publications 2006
  • Flora alpina ; D. Aeschimann, K. Lauber, D. Martin Moser, J-P. Theurillat ; Editions Belin 2004
  • Flora Vegetativa ; S. Eggenberg, A. Möhl ; Rossolis 2008
  • Flore de France ; H. Coste ; Librairie des sciences et des Arts 1937
  • Guide de la flore des Alpes-Maritimes, du Mercantour à la Méditerranée ; L. Carles, L. Thébault ; Giletta Nice-Matin 2010
  • La flore des Alpes-Maritimes et de la Principauté de Monaco ; Collectif, sous la Direction de V. Noble, K. Diadema ; Naturalia Publications 2011
  • Mémento de la flore protégée des Alpes-Maritimes ; R. Salomon, V. Kulesza, B. Offerhaus ; Editions du Cabri 2010
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