Tephrocactus sphaericus var. unguispinus (Backeb.) Backeb.

, Cactaceae (Backeberg) 1: 297 (1958).
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External links to taxonomic opinions:
POWO
IPNI Life Sciences Identifier (LSID)
urn:lsid:ipni.org:names:250288-2
Publication
Die Cactaceae: Handbuch der Kakteenkunde
Collation
1: 297
Family as entered in IPNI
Cactaceae

Links

Nomenclatural link
Opuntia unguispina Backeb., Blätt. Kakteenf. 1937(7): [7] genus 10, sp. 7 (fig.) (1937).