The picture is not dated. Amanda was born on September 25, 1860 and was the first of four children of William and Rachel (Van Curen) Alexander. Amanda was married to Samuel Bray Wiseman on June 7, 1883 (her sister Laura married Sam's brother Henry).
From this other picture and several others of the Alexander siblings from my Dad's collection, I think that the Alexander's were one of the more affluent families in my lineage. Although with a total of 19 children between them (he was married twice and she once before they married each other), I don't see how William and Rachel managed. Of course, all of the children didn't live with them at the same time (the first one was born in 1841 and the last in 1868). Undoubtedly, the later children had it better than the earlier ones.
The photograph below (not a good copy of a copy, but the best I have) was taken earlier. Based on the ages of the children, probably about 1892/3.
Charles (my grandfather, born 1885), Goldie (born 1890), and Smith (born 1888).
Contributed to the "Bling, ancestor Bling" edition of Smile for the Camera.