Plate 1 figs. a–h · 7 observations
This species has been photographed under an open licence only 7 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.
The specimen a real sheet, in a real collection
- Herbarium
- The New York Botanical Garden
- Accession
- 04434492
- Filed as
- Philonotis calcarea (Bruch & Schimp.) Schimp.
- Det. by
- V. F. Brotherus
- Collected
- I. Khan 1901-05-23
- Origin
- IN
- 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.
Where it actually grows measured, from 84 observations
| Condition | 5th percentile | Median | 95th percentile |
|---|---|---|---|
| Coldest month, mean daily low | -14.1 °C | -7.9 °C | 2.9 °C |
| Warmest month, mean daily high | 13.5 °C | 18.1 °C | 22.4 °C |
| Annual rainfall | 726 mm | 1,387 mm | 2,438 mm |
| Rainfall in the driest quarter | 121 mm | 265 mm | 412 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 84 research-grade observations of Philonotis calcarea 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 18 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.
- Bartramia calcarea Bruch & Schimp.
- Philonotis calcarea f. aquatica (Dism.) Loeske & E.Bauer ex Podp.
- Philonotis calcarea f. fluitans Mönk.
- Philonotis calcarea f. gemmiclada Osterwald ex Loeske
- Philonotis calcarea f. loeskeana (Hamm.) Podp.
- Philonotis calcarea f. schliephackei (Röll) Mönk.
- Philonotis calcarea var. aquatica Dism.
- Philonotis calcarea var. crassicostata (Warnst.) Latzel
- Philonotis calcarea var. fluitans Matousch.
- Philonotis calcarea var. gemmiclada (Osterwald ex Loeske) Dism.
- Philonotis calcarea var. loeskeana Hamm.
- Philonotis calcarea var. polyclada (Warnst.) Riehm.
- Philonotis crassicostata Warnst.
- Philonotis fontana subsp. calcarea (Bruch & Schimp.) Boulay
- Philonotis fontana var. polyclada Warnst.
- Philonotis polyclada (Warnst.) Warnst.
- Philonotis rigida var. schliephackei (Röll) Dism.
- Philonotis schliephackei Röll
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.
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. It has no native range either: Kew's checklist does not cover this taxon.