Overview

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: Native

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Type Information

Isosyntype for Saxifraga debilis Engelm. ex A. Gray
Catalog Number: US 1394003
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): E. Hall & J. Harbour
Year Collected: 1862
Locality: Rocky Mountain alpine flora., Colorado, United States, North America
  • Isosyntype: Gray, A. 1864. Proc. Acad. Nat. Sci. Philadelphia. 1863: 62.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Saxifraga rivularis

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


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Statistics of barcoding coverage: Saxifraga rivularis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 10
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: G5 - Secure

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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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Wikipedia

Saxifraga rivularis

Saxifraga rivularis is a species of saxifrage known by several common names, including alpine brook saxifrage, pygmy saxifrage, and weak saxifrage.

Distribution[edit]

Saxifraga rivularis is native to the northern parts of the Northern Hemisphere, where it has a Circumpolar distribution, occurring throughout the Arctic and into the alpine climates of mountainous temperate areas, such as the Sierra Nevada in California. It can be found in moist and wet, rocky habitat, in substrates rich in nitrogen and organic material, such as bird rocks and mossy peat flats.[1]

Description[edit]

Saxifraga rivularis is a small perennial herb growing not much more than 12 centimeters in maximum height. It has small, lobed leaves at the base and along the stem. The inflorescence arises on a hairy, erect peduncle bearing white-petaled flowers and reproductive bulbils.

References[edit]

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Names and Taxonomy

Taxonomy

Comments: Kartesz's (1999) concept of Saxifraga rivularis is broader than that of Jørgensen et al. (2006) and FNA (vol. 8, 2009). Kartesz (1999) includes Rocky Mountain "debilis" material in his S. rivularis, while Jørgensen et al. (2006) and FNA split S. debilis out as a distinct species. Kartesz (1999) also includes "flexuosa" material in his S. rivularis, while Jørgensen et al. (2006) place it in their S. hyperborea. In total, the S. rivularis of Jørgensen et al. (2006) and FNA has Amphi-Atlantic + Amphi-Beringian distribution, in North America occurring only along the Atlantic coast of Canada from Baffin Island south to the Gaspe´ Peninsula, into the White Mountains of New Hampshire, and along the arctic Pacific coast of Alaska from Barrow south to Seward Peninsula. In contrast, Kartesz's (1999) S. rivularis occurs in most western U.S. states and Canadian provinces.

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Comments: Kartesz's (1994 and 1999) concept of Saxifraga rivularis is broader than that of Jørgensen et al. (2006). Kartesz (1994, 1999) includes Rocky Mountain "debilis" material in his S. rivularis, while Jørgensen et al. (2006) split S. debilis out as a distinct species. Kartesz also includes "flexuosa" material in his S. rivularis, while Jørgensen et al. (2006) place it in their S. hyperborea. In total, the S. rivularis of Jørgensen et al. (2006) has Amphi-Atlantic + Amphi-Beringian distribution, in North America occurring only along the Atlantic coast of Canada from Baffin Island south to the Gaspe´ Peninsula, into the White Mountains of New Hampshire, and along the arctic Pacific coast of Alaska from Barrow south to Seward Peninsula. In contrast, Kartesz's (1999) S. rivularis occurs in most western U.S. states and Canadian provinces.

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