Spiranthes spiralis

Tracheophyta MagnoliopsidaOrchidaceaeSpiranthesSpiranthes spiralis

Ecology

A rhizomatous herb of unimproved, well-grazed grassland on dry calcareous soils, especially on chalk and limestone, and on cliff-tops and sand dunes; also on lawns and, rarely, on less acidic heathland. It can persist for many years without flowering, appearing in hundreds when grazing or mowing ceases. Lowland.

Status

Native

World Distribution

European Southern-temperate element.

© G. Toone, IWNHAS

Broad Habitats

Calcareous grassland (includes lowland and montane types)

Light (Ellenberg): 8

Moisture (Ellenberg): 4

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 3

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 4.4

July Mean Temperature (Celsius): 15.9

Annual Precipitation (mm): 884

Height (cm): 15

Perennation - primary

Perennial

Life Form - primary

Hemicryptophyte

Woodiness

Herbaceous

Clonality - primary

Little or no vegetative spread

Count of 10km squares in Great Britain: 655

Count of 10km squares in Ireland: 117

Count of 10km squares in the Channel Isles: 13

Atlas Change Index: -0.95

JNCC Designations

NHMSYS0000463932