Haworthia arachnoidea var. nigricans (Haw.) M.B.Bayer
, Haworthia Revisited 32 (1999): (1999).- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:1014732-1
- Publication
- Haworthia Revisited: A Revision of the Genus
- Collation
- 32 (1999):
- Date of Publication
- 1999
- Family as entered in IPNI
- Aloaceae