IK. Full name and date of birth from Taxon, 47(2): 507 (1998). Death year & 2nd name from (via Luc Brouillet, MT). Obit. in J.Bot. Res. Inst. Texas, 3(2): 995-996 (2009), incl. portr.
Example of Name Published
Opuntia engelmannii var. linguiformis (Griffiths) B.D. Parfitt & D.J. Pinkava in Madrono, 35(4): 347 (1988 publ. 1989).