Titanopsis hugo-schlechteri
Titanopsis hugo-schlechteri in Z. Sukkulentenk. 3: 30. 1927 sec. Hartmann 20171
- =Titanopsis hugo-schlechteri var. alboviridis in Möller's Deutsche Gärtn.-Zeitung 42: 158. 1927 syn. sec. Hartmann 20172
- –Mesembryanthemum astridae in Z. Sukkulentenk. 2: 179. 1926, nom. nud., syn. sec. IPNI 2000+: 4 jul 20204,3
- 3. IPNI 2000+: International Plant Names Index. – The Royal Botanic Gardens, Kew, Harvard University Herbaria & Libraries and Australian National Botanic Gardens – http://www.ipni.org: 4 jul 2020, 4. IPNI 2000+: International Plant Names Index. – The Royal Botanic Gardens, Kew, Harvard University Herbaria & Libraries and Australian National Botanic Gardens – http://www.ipni.org: 4 jul 2020