Juncus caespiticiusE.Mey.

WFO wfo-0000776117 Accepted WFO 2026-06 8 photographs CC BY

Plate 1 figs. a–h · 8 separate observations

Juncus caespiticius, photographed by Arnim Littek
fig. a Arnim Littek, CC BY 4.0 / 2022-05-27 / obs. 201487925
Juncus caespiticius, photographed by Arnim Littek
fig. b Arnim Littek, CC BY 4.0 / obs. 202112211
Juncus caespiticius, photographed by Arnim Littek
fig. c Arnim Littek, CC BY 4.0 / obs. 199923299
Juncus caespiticius, photographed by Arnim Littek
fig. d Arnim Littek, CC BY 4.0 / obs. 189589053
Juncus caespiticius, photographed by Arnim Littek
fig. e Arnim Littek, CC BY 4.0 / obs. 185673080
Juncus caespiticius, photographed by Arnim Littek
fig. f Arnim Littek, CC BY 4.0 / obs. 185474734
Juncus caespiticius, photographed by Arnim Littek
fig. g Arnim Littek, CC BY 4.0 / obs. 182511895
Juncus caespiticius, photographed by Arnim Littek
fig. h Arnim Littek, CC BY 4.0 / obs. 177418364

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 7 botanical countries

Regions where Juncus caespiticius is native: New South Wales, New Zealand North, New Zealand South, South Australia, Tasmania, Victoria, Western Australia New South WalesNew Zealand NorthNew Zealand SouthSouth AustraliaTasmaniaVictoriaWestern Australia
Native distribution of Juncus caespiticius, 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
New South Wales NSW AUSTRALASIA
New Zealand North NZN
New Zealand South NZS
South Australia SOA
Tasmania TAS
Victoria VIC
Western Australia WAU

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 531 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low 5.6 °C 7.3 °C 8.6 °C
Warmest month, mean daily high 18.0 °C 20.5 °C 21.3 °C
Annual rainfall 946 mm 1,166 mm 1,358 mm
Rainfall in the driest quarter 185 mm 230 mm 264 mm

It is barely found anywhere that freezes. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 531 research-grade observations of Juncus caespiticius 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 2 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 caespiticius var. bracteatus Buchenau
  • Juncus similis Buchenau

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. 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.