Carex diandra

Wire sedge ( Carex diandra )

The wire sedge ( Carex diandra ) is a species of the genus of sedges ( Carex ) in the family of the Sedge family ( Cyperaceae ).

Description

The wire sedge is perennial herbaceous plant, reaching heights of growth of 20 to 70 cm. It has a creeping, short rhizome. Your upright stems have down an almost round and above a triangular Queer section. The leaves are narrow and only 2 mm wide and shorter than the stems.

The wire sedge blooms from May to June. The crowded ährenrispige inflorescence is 2-3 cm long with up to 1 cm long branches. The egg-shaped spikelets are occupied at the base with female flowers. The red- brown to light brown glumes are ovate with a pointed top and a lighter keel and wide white skin edge with a length of 3 mm and a width of 2 mm. The dark brown, very shiny hoses have no nerves and are 2.5 to 3 mm long, 1 to 1.5 mm wide, domed on both sides, and gradually narrowed into a bidentate beak. The male flowers have three stamens and female flowers two scars.

The fruit is light brown.

Their chromosome number is 2n = 60

Occurrence

The distribution area of the wire sedge ranges from Eurasia to North America and New Zealand. They usually missing in southern Europe and in the Arctic, but occurs in the Canary Islands. In Germany it is usually a total rare.

The wire sedge occurs on moderately wet base-rich and moderately acidic Torfschlammböden. They are found in marshland in alder swamps and forest ponds. She is a Kennart of Caricetum diandrae ( Eriophorion gracilis ). It is a kind of the lowlands and rises in the Alps only up to altitudes of 1900 meters.

Taxonomy

The first publication of Carex diandra took place in 1781 by Franz von Paula cabinet in Acta Academiae Scientiarum Electoralis Moguntinae Utilium quae Erfurti Est. , 57, 49 A homonym is Carex diandra Roth ( in Tentamen Florae Germanicae, 2 ( 2), 1793, pp. 437 ). Synonyms for Carex diandra cabinet are: Vignea diandra (cabinet ) Soják, Carex paniculata var diandra (cabinet ) Fiori, Carex teretiuscula Gooden .. The specific epithet diandra, which means "with two stamens ", it contributes to injustice because they three stamens possesses; but once given a scientific name can not be changed, even if it is incorrect.