Crassula tetragona subsp. robusta (Toelken) Toelken
, Journal of South African Botany 41 (1975).- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:106405-3
- Publication
- Journal of South African Botany 41
- Family as entered in IPNI
- Crassulaceae