Website/Catalog  (2012)  
 
Website

Tenacious, ('Fidji', 'Macblackpo'), F, yb, McGredy; flowers striped cherry red, lemon, and yellow maturing to blush pink, double , loose, slight fragrance; foliage bright green, glossy; short to medium growth

Booklet  (2008)  
 
An Information List of all Varieties. p8
2002. Tenacious - Macblackpo. Nicknamed Blackpool.