Haworthiopsis viscosa (Linnaeus, 1753) Gildenhuys & Klopper, 2016

Gildenhuys, Sean D. & Klopper, Ronell R., 2016, A synoptic review and new infrageneric classification for the genus Haworthiopsis (Xanthorrhoeaceae: Asphodeloideae), Phytotaxa 265 (1), pp. 1-26 : 18

16. Haworthiopsis viscosa (L.) Gildenh. & Klopper comb. nov.

Bas.:— Aloe viscosa Linnaeus (1753: 332) ≡ Haworthia viscosa (L.) Haworth (1812: 90) ≡ Tulista viscosa (L.) Rowley (2013b: 6) [“ Haworthiopsis viscosa (L.) Rowley” (2013a: 5) nom. inval. (Art. 36.2, McNeill et al., 2012); “ Tulista viscosa (L.) Rowley” (2013a: 6) nom. inval. (Art. 36.2, McNeill et al., 2012)]. Type (lectotype designated by Scott 1981b: 98):—(icon) in Commelijn (1703: t.31). Type (epitype designated by Breuer & Metzing 1997: 13):— SOUTH AFRICA. Western Cape: Blackburn Valley, Calitzdorp [QDS: 3321DA], 1947, W.F. Barker 5073 (NBG0068204!).

Distribution: —It is the third most widespread species after H. tessellata and H. nigra and occurs widely in the Western and Eastern Cape, South Africa.