Plate 1 figs. a–h · 6 observations
This species has been photographed under an open licence only 6 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 16 botanical countries
| Region | TDWG code | Continent |
|---|---|---|
| Belarus | BLR | EUROPE |
| Bulgaria | BUL | |
| Czechia-Slovakia | CZE | |
| East European Russia | RUE | |
| Greece | GRC | |
| Hungary | HUN | |
| Krym | KRY | |
| NW. Balkan Pen. | YUG | |
| Romania | ROM | |
| South European Russia | RUS | |
| Ukraine | UKR | |
| Iran | IRN | ASIA-TEMPERATE |
| Kazakhstan | KAZ | |
| North Caucasus | NCS | |
| Transcaucasus | TCS | |
| Türkiye | TUR |
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 153 observations
| Condition | 5th percentile | Median | 95th percentile |
|---|---|---|---|
| Coldest month, mean daily low | -11.9 °C | -4.3 °C | 0.5 °C |
| Warmest month, mean daily high | 24.3 °C | 26.2 °C | 27.9 °C |
| Annual rainfall | 440 mm | 564 mm | 834 mm |
| Rainfall in the driest quarter | 82 mm | 106 mm | 168 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 153 research-grade observations of Carduus hamulosus 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 Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.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 9 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.
- Carduus hamulosus subsp. pseudocollinus (Schmalh.) Soó
- Carduus hamulosus subsp. sordidus (DC.) Soó
- Carduus hamulosus var. hamulosus
- Carduus hystrix C.A.Mey.
- Carduus stenocephalus Tamamsch.
- Carduus tauricus Klokov
- Carduus tortuosus Gorl. & Ye.M.Kondr.
- Carduus tortuosus Gorl. & Kondr.
- Carduus tyraicus Klokov
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.
- 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.