Overview

Brief Summary

Biology

Yellow marsh saxifrage flowers in July to September.
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Description

Yellow marsh saxifrage is a tufted, hairy plant, with stems of a reddish-brown. The leaves are spear-shaped and concentrated around the lower half of the stem. The flowers are bright yellow, sometimes showing small red spots.
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Distribution

National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Global Range: Circumboreal, south from AK to n. B.C., also in Rocky Mtns. of CO and in MT and ID.

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Shanxi, W Sichuan, Xinjiang, Xizang, NW Yunnan [Kashmir, Kazakhstan, Mongolia, Russia, Sikkim, Tajikistan; C and N Europe, ?North America].
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Range

Found throughout much of Europe, the yellow marsh saxifrage is threatened across much of its range. Once found in 13 counties in Britain, it is now restricted to some 20 sites, most of them in the north Pennine region of England.
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Physical Description

Morphology

Description

Herbs perennial, 6.5-21 cm tall. Stem sparsely brown crisped villous. Basal leaves with petiole 1.2-2.2 cm, margin brown crisped villous; leaf blade elliptic, lanceolate, or oblong to linear-oblong, 1.1-2.2 cm × 3-10 mm, both surfaces glabrous, margin brown pilose or glabrous. Cauline leaves lanceolate to oblong, 0.4-2.2 cm × 1-6 mm, both surfaces glabrous, margin brown crisped villous; proximal ones larger with petiole longer, distal ones smaller with petiole gradually shorter to absent. Flower solitary or cyme 2-3.7 cm and 2-4-flowered; pedicels 0.9-1.3 cm, brown crisped villous. Sepals erect, then spreading to reflexed, elliptic, or ovate to narrowly so, 3-6.1 × 1.5-3.5 mm, abaxially and marginally brown crisped villous or glabrous on both surfaces, veins 3-11(-13), not confluent at apex, apex obtuse or acute. Petals yellow, elliptic or obovate to narrowly ovate, 7.9-10.3 × 2.9-6.8 mm, 2-callose, 7-11(-17)-veined, base with a claw 0.3-0.5 mm, apex subobtuse or acute. Stamens 4-5.5 mm. Ovary subsuperior, ovoid, 2-5 mm; styles 1-1.8 mm. Fl. and fr. Jun-Sep. 2n = 16, 32.
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Diagnostic Description

SAXIFRAGA CHRYSANTHA and S. FLAGELLARIS are our other yellow-flowered saxifrages; the former has leaves 3-7 mm long, while the latter has long, sinuous stolons.

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Ecology

Habitat

Forests, alpine meadows, rock crevices; 2100-5000 m.
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This is a plant of very particular requirements and needs a 'base-rich' soil, that is, soil fed by calcareous flushes of water. This type of habitat is scarce.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Saxifraga hirculus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Specimens with Barcodes: 17
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: TNR - Not Yet Ranked

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National NatureServe Conservation Status

Canada

Rounded National Status Rank: N4 - Apparently Secure

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Status

Protected under Schedule 8 of the Wildlife and Countryside Act (1981) and listed in Appendix 1 of the Bern Convention and Annexes II and IV of the EC Habitats Directive.
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Threats

This species is a victim of over-grazing, often loosing its flowers before they can produce seeds, and the effects of agricultural improvement.
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Management

Conservation

The yellow marsh saxifrage is listed in the UK Biodiversity Action Plans (UKBAPs), and is included in English Nature's Species Recovery Programme (SRP). Recent surveys of this plant have suggested that known populations may have been under estimated through the grazing off of flowers heads. This makes it hard to recognise the plant in the field. It is realised, however, that upland over-grazing has to be controlled if this species is to have a future in the UK and, as a precautionary measure, seeds have been collected and stored in the Millennium Seed Bank by the Royal Botanic Gardens, Kew. Some of these seeds will be propagated and planted back in the wild on suitable sites as part of a re-introduction programme. As the yellow marsh saxifrage is threatened throughout its range, an important aspect of the work to conserve it has been co-operation with European conservation groups, to find out more about its biology.
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Wikipedia

Saxifraga hirculus

Saxifraga hirculus is a species of saxifrage, commonly called marsh saxifrage or bog saxifrage. It is a perennial herb with yellow flowers and red stem, with a height ranging from five to thirty cm, and grows on bog landscape.[1][2]

References[edit]

  1. ^ Godal, Anne Marit (ed.). "myrsildre". Store norske leksikon (in Norwegian). Oslo: Norsk nettleksikon. Retrieved 6 October 2012. 
  2. ^ "Plants Profile". United States Department of Agriculture (USDA). 
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