Ranunculus pygmaeus — Details

Pygmy Buttercup learn more about names for this taxon

Overview

Distribution

Localities documented in Tropicos sources

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Ranunculus pygmaeus Wahlenb.:
Canada (North America)
United States (North America)
Greenland (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Greenland; Alta., B.C., Nfld., N.W.T., Que., Yukon; Alaska, Colo., Idaho, Mont., Utah, Wyo.; Europe (Spitsbergen).
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National Distribution

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Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Morphology

Description

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Stems erect or ascending from short caudices, 0.6-3.5 cm (sometimes longer in fruit), each with 1-2 flowers. Roots slender, 0.1-0.6 mm thick. Basal leaves persistent, blades reniform to transversely elliptic or semicircular, 3-parted or -divided, 0.45-0.9 × 0.6-1.3 cm, at least lateral segments again lobed, base truncate or nearly cordate, margins entire, apex rounded to obtuse. Flowers: pedicels glabrous or pubescent; receptacle glabrous; sepals 2-4 × 1.2-1.6 mm, abaxially sparsely hairy, hairs colorless; petals 5, 1.2-3.5 × 1.1-2.8 mm; nectary scale glabrous. Heads of achenes nearly globose to cylindric, 2.5-7 × 2.5-5 mm; achenes 1-1.2 × 0.8-1.1 mm, glabrous; beak subulate, straight or curved, 0.3-0.7 mm. 2 n = 16.
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Diagnostic Description

Synonym

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Ranunculus pygmaeus var. langeana Nathorst
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Ecology

Habitat

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Arctic and alpine meadows and slopes, usually around persistent snow patches; 0-4000m.
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Life History and Behavior

Cyclicity

Flowering/Fruiting

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Flowering summer (Jul-Sep).
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Ranunculus pygmaeus

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The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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Statistics of barcoding coverage: Ranunculus pygmaeus

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Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Specimens with Barcodes: 14
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

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Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

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Rounded Global Status Rank: G5 - Secure

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Wikipedia

Ranunculus pygmaeus

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This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2009)

Ranunculus pygmaeus (the pygmy buttercup or dwarf buttercup) is a species of buttercup found throughout the Arctic, as well as in the mountains of Norway and the Rocky Mountains. A few populations also exist in the Eastern Alps and Tatra Mountains.

Pygmy Butercup, Ranunculus pygmaeus

It is a small plant, prostrate-ascending, 1-5 cm tall. The stems are single-flowered, with the basal leaves numerous. The leaves are deeply cleft into 3-5 lobes. The flowers are 5-6 mm in diameter, with five pale yellow petals, and five hairy sepals. After flowering, the stems stretch considerably, reaching far above the basal leaves. It grows in snowbeds, moss carpets and other moist localities.

See also

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Notes

Comments

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Ranunculus pygmaeus var. langeana has been described as having deeply divided basal leaves and strongly elongate heads of achenes (at least 5 mm). These characteristics are not well correlated with one another, however, and the variety does not seem natural.
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