- ↑ Nomen primum ad plantam spinosam adhibitum quod sit nescitur.
- ↑ Christenhusz et Byng 2016.
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- Brown, Roger (2001), "Cultivation of Cacti", pp. 85–92 in Anderson 2001.
- Christenhusz, M. J. M., et J. W. Byng. 2016. "The number of known plants species in the world and its annual increase." Phytotaxa 261 (3): 201–17. doi:10.11646/phytotaxa.261.3.1 Textus interretialis. Archivum, die 29 Iulii conservatum.
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