Camissonia parvula(Nutt. ex Torr. & A.Gray) P.H.Raven

Lewis River suncup

WFO wfo-0000582881 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Camissonia parvula, photographed by Matt Berger
fig. a Matt Berger, CC BY 4.0 / 2022-05-01 / obs. 193362224
Camissonia parvula, photographed by Jim Morefield
fig. b Jim Morefield, CC BY 4.0 / obs. 53166954
Camissonia parvula, photographed by Jim Morefield
fig. c Jim Morefield, CC BY 4.0 / obs. 53360563
Camissonia parvula, photographed by Matt Lavin
fig. d Matt Lavin, CC BY 4.0 / obs. 174725672
Camissonia parvula, photographed by Matt Lavin
fig. e Matt Lavin, CC BY 4.0 / obs. 174725685
Camissonia parvula, photographed by Jim Morefield
fig. f Jim Morefield, CC BY 4.0 / obs. 15883408
Camissonia parvula, photographed by Steve Matson
fig. g Steve Matson, CC BY 4.0 / obs. 203109659
Camissonia parvula, photographed by Cecelia Alexander
fig. h Cecelia Alexander, CC0 1.0 / obs. 133499361

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.

The specimen a real sheet, in a real collection

Herbarium
The New York Botanical Garden
Accession
00851717
Filed as
Camissonia parvula (Nutt. ex Torr. & A.Gray) P.H.Raven
Det. by
P. H. Raven 1964-01-01
Collected
A. Nelson 1898-06-14
Origin
US
The sheet
View the digitised specimen (CC BY 4.0)

A real pressed plant, in a real collection, under the accession number above. Not an illustration of one. The holding institution does not serve this sheet’s image to third parties, so there is no photograph here. The record is real and the link goes to it. Where we hold no openly licensed sheet for a species this section is simply absent, and where a sheet never recorded who determined it, that field stays empty rather than being filled in. Roughly half of all herbarium sheets never recorded a determiner, which is ordinary.

Native range 11 botanical countries

Regions where Camissonia parvula is native: Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, Wyoming ArizonaCaliforniaColoradoIdahoMontanaNevadaNew MexicoOregonUtahWashingtonWyoming
Native distribution of Camissonia parvula, 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
Arizona ARI NORTHERN AMERICA
California CAL
Colorado COL
Idaho IDA
Montana MNT
Nevada NEV
New Mexico NWM
Oregon ORE
Utah UTA
Washington WAS
Wyoming WYO

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.

Where it actually grows measured, from 71 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -11.6 °C -5.1 °C -1.4 °C
Warmest month, mean daily high 25.2 °C 31.7 °C 33.2 °C
Annual rainfall 163 mm 250 mm 411 mm
Rainfall in the driest quarter 21 mm 32 mm 53 mm

It is found where winters bring hard frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 71 research-grade observations of Camissonia parvula that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

Also published as 7 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.

  • Oenothera contorta var. flexuosa (A.Nelson) Munz
  • Oenothera parvula Nutt. ex Torr. & A.Gray
  • Oenothera parvula Nutt.
  • Sphaerostigma contortum var. flexuosum A.Nelson
  • Sphaerostigma filiforme A.Nelson
  • Sphaerostigma flexuosum (A.Nelson) Rydb.
  • Sphaerostigma parvulum (Nutt.) Walp.

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.