Plate 1 figs. a–h · 8 separate observations
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 17 botanical countries
| Region | TDWG code | Continent |
|---|---|---|
| Alabama | ALA | NORTHERN AMERICA |
| Connecticut | CNT | |
| Delaware | DEL | |
| District of Columbia | WDC | |
| Florida | FLA | |
| Georgia | GEO | |
| Louisiana | LOU | |
| Maryland | MRY | |
| Massachusetts | MAS | |
| Mississippi | MSI | |
| New Jersey | NWJ | |
| New York | NWY | |
| North Carolina | NCA | |
| Pennsylvania | PEN | |
| Rhode I. | RHO | |
| South Carolina | SCA | |
| Virginia | VRG |
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 129 observations
| Condition | 5th percentile | Median | 95th percentile |
|---|---|---|---|
| Coldest month, mean daily low | -1.9 °C | 6.2 °C | 10.2 °C |
| Warmest month, mean daily high | 29.4 °C | 31.8 °C | 32.7 °C |
| Annual rainfall | 1,136 mm | 1,349 mm | 1,710 mm |
| Rainfall in the driest quarter | 178 mm | 246 mm | 346 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 129 research-grade observations of Lithospermum virginianum 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 Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.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 10 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.
- Lithospermum virginicum L.
- Onosmodium alabamense Gand.
- Onosmodium floridanum Gand.
- Onosmodium hispidum Michx.
- Onosmodium longistylum Gand.
- Onosmodium scabrum Roem. & Schult.
- Onosmodium virginianum A.DC.
- Onosmodium virginianum var. hirsutum Mack.
- Osmodium nigrum Raf.
- Purshia hispida Lehm.
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.
- USDA PLANTS Database. common name, checklist symbol ONVI2. public domain. 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.