Cactaceae
Miniature barrel cactus
Thelocactus setispinus
- Family
- Cactaceae
- Genus
- Thelocactus
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Common names
By language (6)
- arz
- ثيلوكاكتوس سيتيسبينوس
- Cantonese
- 龍王球
- Chinese
- 龙王球, 龙王丸, 龍王球
- Dutch
- Borstelhaakcactus
- English
- Miniature barrel cactus
- Spanish
- Biznaga-pezón Setosa
Synonyms
- Cactus bicolor Terán & Berland.
- Cactus bicolor Terán & Berland. ex Engelm.
- Echinocactus cachetianus (Labour.) Hildm.
- Echinocactus hamatus Muehlenpf.
- Echinocactus hamatus J.Forbes
- Echinocactus hamulosus Regel
- Echinocactus muehlenpfordtii J.H.Fennell
- Echinocactus nodosus (Linke) Hemsl.
- Echinocactus setispinus Engelm.
- Echinocactus setispinus f. cachetianus (Labour.) Schelle
- Echinocactus setispinus f. hamatus (Muehlenpf.) Schelle
- Echinocactus setispinus f. mierensis (K.Schum.) Schelle
- Echinocactus setispinus f. orcuttii (K.Schum.) Schelle
- Echinocactus setispinus var. cachetianus Labour.
- Echinocactus setispinus var. hamatus (Muehlenpf.) Engelm.
- Echinocactus setispinus var. martelii Schelle
- Echinocactus setispinus var. mierensis K.Schum.
- Echinocactus setispinus var. muehlenpfordtii (J.H.Fennell) J.M.Coult.
- Echinocactus setispinus var. orcuttii K.Schum.
- Echinocactus setispinus var. robustus Poselg.
- Echinocactus setispinus var. setaceus Engelm.
- Echinopsis nodosa Linke
- Ferocactus setispinus (Engelm.) L.D.Benson
- Hamatocactus bicolor (Terán & Berland.) I.M.Johnst.
- Hamatocactus setispinus (Engelm.) Britton & Rose
- Hamatocactus setispinus f. cachetianus (Labour.) Krainz
- Hamatocactus setispinus f. flavibaccatus G.Unger
- Hamatocactus setispinus f. orcuttii (K.Schum.) Krainz
- Thelocactus setispinus var. cachetianus (Labour.) Pilbeam
- Thelocactus setispinus var. hamatus (Muehlenpf.) Pilbeam
- Thelocactus setispinus var. mierensis (K.Schum.) Pilbeam
- Thelocactus setispinus var. orcuttii (K.Schum.) Pilbeam
Flowers
- In flower
- April to September (from 187 flowering iNaturalist observations worldwide)
Characteristics
- Growth habit
- Shrub
- Lifespan
- Perennial
- In the US and Canada
- Lower 48 states: native
Photos
Photo: Peter A. Mansfeld, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Clinton & Charles Robertson from Del Rio, Texas & College Station, TX, USA, CC BY 2.0, from Wikimedia Commons 
Photo: Clinton & Charles Robertson from Del Rio, Texas & College Station, TX, USA, CC BY 2.0, from Wikimedia Commons 
Photo: Prenn, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Prenn, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Prenn, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Prenn, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Hectonichus, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Clinton & Charles Robertson from RAF Lakenheath, UK & San Marcos, TX, USA & UK, CC BY 2.0, from Wikimedia Commons 
Photo: Dornenwolf from Deutschland, CC BY-SA 2.0, from Wikimedia Commons ![Miniature barrel cactus: 仙人掌-龍王丸 Hamatocactus setispinus (Thelocactus setispinus) [香港嘉道理農場 Kadoorie Farm, Hong Kong]](/plants/thelocactus-setispinus/photos/eefb35b1cf4988c6-s.webp)
Photo: 阿橋 HQ, CC BY-SA 2.0, from Wikimedia Commons
![Miniature barrel cactus: 仙人掌-龍王丸 Hamatocactus setispinus (Thelocactus setispinus) [香港嘉道理農場 Kadoorie Farm, Hong Kong]](/plants/thelocactus-setispinus/photos/eefb35b1cf4988c6-l.webp)
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Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.