Answer: Based on your description I suspect you are describing a form of Lespedeza thunbergii. This plant is hardy to zone 4, and grows much as you described. Although I have seen it grown in many old fashioned gardens I have not heard it called Weeping Mary as a common name. There is a photo of the bloom at the Wayside Gardens site.
P.O. Box 1
Hodges, SC 29695
Web site: http://www.waysidegardens.com
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