8 favorite votes.  

Light yellow Polyantha.
Registration name: Pinafore
Exhibition name: Pinafore

Bred by Herbert C. Swim (United States, 1959).
Introduced in United States by Roseway Nursery Historic Archive 1980 in 1959 as 'Pinafore'.

Polyantha.  

Light pink.  Flowers pale yellow to white, tinged pink.  Average diameter 1.75".  Single to semi-double, cluster-flowered, in large clusters, flat bloom form.  Blooms in flushes throughout the season.  

Short, bushy, compact.  Glossy foliage.  

USDA zone 6b through 9b (default).  

United States - Patent No: PP 1,810   VIEW USPTO PATENT