Acer rubrum 'Autumn Flame'
Patent documention (PDF 292K)
Acer rubrum "Doric'
Patent documentation (PDF 304K)
Acer saccharum 'Legacy'
Complete patent documentation (PDF 536K)
Acer saccharum 'Newton Sentry'
"Acer saccharum 'Newton Sentry': Setting the Record Straight"
An article by Michael Dathe in the Arnold Arboretum's Arnoldia [43(3) 29-32] that chronicles the cultivar's history and discusses the confusing problems with its nomenclature:
"Habit Forms of Acer saccharum"
by Bernard Harkness, Highland Park Herbarium (PDF 504K)
Discusses the nomenclature of 'Newton Sentry'. This is the article that Dathe (above) refers to as having complicated the matter.