Ranunculus occidentalis — Details

Western Buttercup learn more about names for this taxon

Overview

Distribution

Localities documented in Tropicos sources

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Ranunculus occidentalis var. rattanii A. Gray:
United States (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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Localities documented in Tropicos sources

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Ranunculus occidentalis var. eisenii (Kellogg) A. Gray:
United States (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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Localities documented in Tropicos sources

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Ranunculus occidentalis Nutt.:
Canada (North America)
United States (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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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 to reclining, not rooting nodally, hirsute or sometimes pilose or glabrous, base not bulbous. Roots never tuberous. Basal leaf blades broadly ovate to semicircular or reniform in outline, 3-parted or -foliolate, 1.5-5.3 × 2.2-8 cm, segments usually again 1(-2)×-lobed, ultimate segments oblong or elliptic to lanceolate or oblanceolate, margins dentate (sometimes dentate-lobulate or entire), apex acute to rounded-obtuse. Flowers: receptacle glabrous; sepals reflexed 2-3 mm above base, 4-7(-9) × 2-4 mm, hirsute; petals 5-14, yellow, 5-13 × 1.5-8 mm. Heads of achenes hemispheric, 3-7 × 5-9 mm; achenes 2.6-3.6(-4.8) × 1.8-3(-3.2) mm, glabrous, rarely hispid, margin forming narrow rib 0.1-0.2 mm wide; beak persistent, lanceolate to lance-subulate, straight or curved, 0.4-2.2 mm.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Ranunculus occidentalis

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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 occidentalis

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

Conservation Status

NatureServe Conservation Status

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Rounded Global Status Rank: G5 - Secure

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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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Wikipedia

Ranunculus occidentalis

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Ranunculus occidentalis (western buttercup) is a species of buttercup found in the western United States and Canada.[1] Its distribution extends from Alaska through British Columbia and Alberta to central California.[1] The flower can be seen in open meadows, forests, and other generally flat areas up to an elevation of 2,200 metres (7,200 ft).[2]

Aleut Indians may have used juice from the plant as a poison,[3] its toxicity arising from the substance protoanemonin.[4] Shasta Indians coincided blooming R. occidentalis with salmon runs in the summer.[5] The seeds were used to make pinole, a staple food.[6]

This plant is similar to, and sometimes difficult to distinguish from, the California buttercup (Ranunculus californicus).

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References

  1. ^ a b "Plants Database Entry ranunculus occidentalis". United States Department of Agriculture. http://plants.usda.gov/java/profile?symbol=RAOCO.
  2. ^ "Jepson Manual Treatment for ranunculus occidentalis". University of California Berkeley Jepson Treaments. http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?Ranunculus%20occidentalis. Retrieved 2009-06-05.
  3. ^ Flora of North America
  4. ^ Bank, Theodore (1953). Botanical and ethnobotanical studies in the Aleutian Islands - Health and Medical Lore .... Michigan Academy of Science, Arts and Letters. p. 428.
  5. ^ Holt, Catharine (1946). Shasta Ethnography. University of California, Berkeley. p. 310.
  6. ^ Ethnobotany
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Notes

Comments

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The seeds of Ranunculus occidentalis were eaten by some Californian Indians. D. E. Moerman (1986) identified this taxon as an Aleut poison: juice of the flowers could be slipped into food to poison the person who ate it.
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