Assassination Trivia

[Eva Elisabeth]

Is it somewhere on the funeral train route?
This is where major populations of gingko occur in the US (can grow almost everywhere though):
   
I would think in 1865, the seeds* were rather available in bigger cities, or near universitiy arboretums. Harvard had one back then (I know for sure as the redwoods growing in our botanical garden were brought from there in 1848.) So Boston maybe?
[*I would think it was seeded, not planted, because of the core sample proof.]