This is one of those cases where there are three hostas with the same name. None are registered with The American Hosta Society. The first one to be registered would become the "official" hosta of that name and the others would have to be renamed.

Maxine Armstrong of Nebraska originated this non-registered cultivar in the late 1960s. It is a H. nakaiana seedling that grows into a small size hosta about 8 inches in height and 2 feet in width. The leaves are slightly wavy with smooth texture on the surface. It bears purplish flowers in July.

Hosta Helper will call this plant 'Sweetheart' (Armstrong)

According to The Hostapedia by Mark Zilis (2009), "George Schmid (1991) listed three different plants with this name, but the only one I've ever seen in gardens came from Maxine Armstrong. It forms a very dense mound of teardrop-shaped foliage and produces a good show of purple flowers well above the foliage for the first two weeks of July."

As mentioned above, The Genus HOSTA by W. George Schmid (1991) mentions two other cultivars of this name. One is an H. capitata hybrid also called 'Wallace No. 31' originated by "Wallace" which is a medium size hosta about 12 inches high by 22 inches wide with medium green foliage. It bears purple, bell shape flowers in July followed by fertile seeds.

Hosta Helper will call this plant 'Sweetheart' (Wallace)

The Genus HOSTA by W. George Schmid (1991) also lists a cultivar by this name that is a clonal form of H. nakaiana or an F1 hybrid originated by "Lee".

Hosta Helper will call this plant 'Sweetheart' (Lee)