[Ruskoe-1|Eliza( Ruskoe) Plant] should be without doubt Eliza Dunning.. The family unit for Joseph plant in the 1871 Census gives Eliza's place of birth as Wellington.
Joseph Plant 47
Eliza Plant 45
Elizabeth Plant 22
George Plant 18
Sarah Plant 14
Joseph Plant 12
Adelade Plant 7
William Plant 5
John Plant 2
William Plant 1
Jane Plant 16
Eliza Dunning was christened 17 April 1825, Wellington, Shropshire the daughter of Thomas Dunning and Jane.(https://familysearch.org/ark:/61903/1:1:NYP9-4B8). Eliza Dunning as you say married Josph Plant in 1848.
Eliza Ruskoe married in 1847 Wellington Shropshire, but not Joseph Plant, rather one of the other gentlemen from the BMD marriage entry, in fact Phillip Wardall...
Surname First name(s) District Vol Page
Marriages Mar 1847 (>99%)
BRICE James Wellington Sp 18 221
Burgess Ada Wellington Sal 18 221
FLETCHER Benjamin Wellington Sal 18 221
Jones William Wellington Sp 18 221
MORRIS Ellen Wellington Sp 18 221
NOWNS Ann Wellington Sal 18 221
PLANT Joseph W Bromwich 18 221
Ruskoe Eliza Wellington S 18 221
WARDALL Philip Wellington Sal 18 221
Joseph Plant is incorrectly registerd.
This is Phillip Wardall & Eliza in the 1861 Census living in Dawley, Shropshire, were Eliza was recorded to have been born.
Philip Wardall 34
Eliza Wardall 34
James Wardall 14
Emmala Wardall 12
Eliza Wardall 8
John Wardall 6
Thomas Wardall 3
William Wardall 2
Philips Wardall 1/12
Finally, Eliza Roskoe was christened Eliza Rosco 18 February 1827 Dawley- Magna, Shropshire, the daughter of Thomas Rosco & Ann. ( https://familysearch.org/ark:/61903/1:1:J95D-Y29).