The idea of finding "lost" plants immediately reminded me of this story on the stupendously compendious "Spitalfields Life" daily blog by the notionally anonymous "Gentle Author", whom details the past and present of a specific part of East London.
"Last year, I joined a group of intrepid plant hunters descending into the depths of the last remaining bomb site in the City of London. We climbed all the way down into the hole until we reached the level of the platforms of what was formerly part of Aldgate East Station, until a V2 bomb dropped nearby in the Second World War.
Consequently, the plant life that flourished in this rare haven of nature remained untouched in all these years because the proximity of the tube line precluded any redevelopment until now, and so the project was to record this lost world of botanic richness at the eleventh hour. The plant species collected included many that were once commonplace throughout the City and the East End yet which no longer thrive here."
Of course in this case the plants are not "lost" per se, but the population is a snapshot of a lost _ecosystem_, left untouched more or less, telling you something about how London used to look (and smell).
https://spitalfieldslife.com/2018/05/11/wild-city/ - "A Lost Botanic World In Aldgate"
"Last year, I joined a group of intrepid plant hunters descending into the depths of the last remaining bomb site in the City of London. We climbed all the way down into the hole until we reached the level of the platforms of what was formerly part of Aldgate East Station, until a V2 bomb dropped nearby in the Second World War.
Consequently, the plant life that flourished in this rare haven of nature remained untouched in all these years because the proximity of the tube line precluded any redevelopment until now, and so the project was to record this lost world of botanic richness at the eleventh hour. The plant species collected included many that were once commonplace throughout the City and the East End yet which no longer thrive here."
Of course in this case the plants are not "lost" per se, but the population is a snapshot of a lost _ecosystem_, left untouched more or less, telling you something about how London used to look (and smell).