Packera streptanthifolia(Greene) W.A.Weber & Á.Löve

Rocky Mountain butterweedRocky Mountain groundselcleftleaf groundsel

WFO wfo-0000047364 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Packera streptanthifolia, photographed by Caleb Catto
fig. a Caleb Catto, CC BY 4.0 / 2020-07-16 / obs. 84815662
Packera streptanthifolia, photographed by Caleb Catto
fig. b Caleb Catto, CC BY 4.0 / obs. 72705367
Packera streptanthifolia, photographed by Alison Northup
fig. c Alison Northup, CC BY 4.0 / obs. 44294044
Packera streptanthifolia, photographed by Todd Boland
fig. d Todd Boland, CC BY 4.0 / obs. 113397835
Packera streptanthifolia, photographed by Caleb Catto
fig. e Caleb Catto, CC BY 4.0 / obs. 78550627
Packera streptanthifolia, photographed by Hilary Rose Dawson
fig. f Hilary Rose Dawson, CC BY 4.0 / obs. 134942830
Packera streptanthifolia, photographed by dougbrown
fig. g dougbrown, CC0 1.0 / obs. 112442355
Packera streptanthifolia, photographed by Logan J.L. Bradley
fig. h Logan J.L. Bradley, CC BY 4.0 / obs. 84273547

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 15 botanical countries

Regions where Packera streptanthifolia is native: Alberta, British Columbia, California, Colorado, Idaho, Montana, Nevada, New Mexico, Northwest Territories, Oregon, Saskatchewan, Utah, Washington, Wyoming, Yukon AlbertaBritish ColumbiaCaliforniaColoradoIdahoMontanaNevadaNew MexicoNorthwest TerritoriesOregonSaskatchewanUtahWashingtonWyomingYukon
Native distribution of Packera streptanthifolia, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
Alberta ABT NORTHERN AMERICA
British Columbia BRC
California CAL
Colorado COL
Idaho IDA
Montana MNT
Nevada NEV
New Mexico NWM
Northwest Territories NWT
Oregon ORE
Saskatchewan SAS
Utah UTA
Washington WAS
Wyoming WYO
Yukon YUK

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 31 in flower of 40 examined

Peak flowering in Jun. Each bar is the share of Packera streptanthifolia observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 31 of 40 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 9 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 28 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Packera oodes (Rydb.) W.A.Weber
  • Packera streptanthifolia var. borealis (Torr. & A.Gray) Trock
  • Senecio adamsii Howell
  • Senecio aureus var. borealis Torr. & A.Gray
  • Senecio cognatus Greene
  • Senecio cymbalarioides Nutt.
  • Senecio cymbalarioides var. borealis (Torr. & A.Gray) Greenm.
  • Senecio cymbalarioides var. cymbalarioides
  • Senecio cymbalarioides var. streptanthifolius (Greene) Greenm.
  • Senecio fulgens Rydb.
  • Senecio jonesii Rydb.
  • Senecio leonardi Rydb.
  • Senecio longipetiolatus Rydb.
  • Senecio oodes Rydb.
  • Senecio platylobus Rydb.
  • Senecio rubricaulis var. rubricaulis
  • Senecio rydbergii A.Nelson
  • Senecio streptanthifolius Greene
  • Senecio streptanthifolius var. borealis (Torr. & A.Gray) J.F.Bain
  • Senecio streptanthifolius var. kluanei J.F.Bain
  • Senecio streptanthifolius var. laetiflorus (Greene) J.F.Bain
  • Senecio streptanthifolius var. oodes (Rydb.) J.F.Bain
  • Senecio streptanthifolius var. rubricaulis (Greene) J.F.Bain
  • Senecio streptanthifolius var. streptanthifolius

and 4 more.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.