Plate 1 figs. a–f · 3 observations
This species has been photographed under an open licence only 3 times, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.
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 26 botanical countries
| Region | TDWG code | Continent |
|---|---|---|
| Alabama | ALA | NORTHERN AMERICA |
| Arkansas | ARK | |
| Colorado | COL | |
| Connecticut | CNT | |
| Georgia | GEO | |
| Illinois | ILL | |
| Indiana | INI | |
| Maine | MAI | |
| Massachusetts | MAS | |
| Michigan | MIC | |
| Minnesota | MIN | |
| Missouri | MSO | |
| New Brunswick | NBR | |
| New Jersey | NWJ | |
| New York | NWY | |
| North Dakota | NDA | |
| Nova Scotia | NSC | |
| Ohio | OHI | |
| Oklahoma | OKL | |
| Ontario | ONT | |
| Pennsylvania | PEN | |
| Québec | QUE | |
| Tennessee | TEN | |
| Vermont | VER | |
| Virginia | VRG | |
| Wisconsin | WIS |
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 57 observations
| Condition | 5th percentile | Median | 95th percentile |
|---|---|---|---|
| Coldest month, mean daily low | -16.2 °C | -8.1 °C | 0.0 °C |
| Warmest month, mean daily high | 22.1 °C | 26.0 °C | 31.3 °C |
| Annual rainfall | 901 mm | 1,089 mm | 1,474 mm |
| Rainfall in the driest quarter | 134 mm | 221 mm | 274 mm |
It is found where winters are severely cold. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 57 research-grade observations of Juncus brachycephalus 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 3 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.
- Juncus brachycephalus f. brachycephalus
- Juncus brachycephalus f. hexandrus R.F.Martin
- Juncus canadensis var. brachycephalus Engelm.
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.