Leptosiphon bolanderi (Bolander's linanthus)

Plate 1 figs. a–h · 8 separate observations

Leptosiphon bolanderi, photographed by Arvel Hernandez — fig. a Arvel Hernandez, CC BY 4.0 / 2022-05-25 / obs. 212647577

Leptosiphon bolanderi, photographed by Matt Berger — fig. c Matt Berger, CC BY 4.0 / obs. 65686105

Leptosiphon bolanderi, photographed by Don Loarie — fig. d Don Loarie, CC BY 4.0 / obs. 8722747

Leptosiphon bolanderi, photographed by Ken-ichi Ueda — fig. e Ken-ichi Ueda, CC BY 4.0 / obs. 3346170

Leptosiphon bolanderi, photographed by Scott Loarie — fig. f Scott Loarie, CC0 1.0 / obs. 8544534

Leptosiphon bolanderi, photographed by Trevor Schalla — fig. h Trevor Schalla, CC0 1.0 / obs. 201555205

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 3 botanical countries

Native distribution of Leptosiphon bolanderi, 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.

Region	TDWG code	Continent
California	CAL	NORTHERN AMERICA
Oregon	ORE
Washington	WAS

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 98 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	-4.4 °C	-0.1 °C	3.1 °C
Warmest month, mean daily high	27.1 °C	31.4 °C	35.0 °C
Annual rainfall	564 mm	1,089 mm	2,031 mm
Rainfall in the driest quarter	10 mm	29 mm	48 mm

It is found where winters bring light 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 98 research-grade observations of Leptosiphon bolanderi 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 5 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.

Gilia bolanderi A.Gray
Gilia bolanderi var. ambigua Brand
Linanthus bakeri H.Mason
Linanthus bolanderi Greene
Navarretia bolanderi (A.Gray) Kuntze

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
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.