In message , Stewart Robert Hinsley
writes
I was visiting a garden on Wednesday, and photographed a few plants
that I did not recognise. In several cases I don't know whether they're
cultivated or wild, but they're sufficiently obscure to make the former
plausible. Any ideas?

1) a meadow rue (Thalictum) - I'd like a second opinion on the species,
as I've been relying on labels in the past.

http://www.flickr.com/photos/27317581@N06/3663596304/
http://www.flickr.com/photos/27317581@N06/3663596032/
http://www.flickr.com/photos/27317581@N06/3663596482/

2) looks like an avens (Geum) to me, but I don't recognise the species.

http://www.flickr.com/photos/27317581@N06/3663573908/
http://www.flickr.com/photos/27317581@N06/3663573516/
http://www.flickr.com/photos/27317581@N06/3663573656/

3) no idea, other than that it's a dicot. Ignore the little white
flowers - they belong to bitter cresses. The pearlwort in the bottom
left gives some scale.

http://www.flickr.com/photos/27317581@N06/3663573424/

4) looks like a giant white-flowered buttercup (Ranunculus
platanifolius would be my best guess, but it's out of my knowledge of
the genus). I couldn't get close because it was 5 feet behind a fence
which was blocking off an area for safety reasons.

http://www.flickr.com/photos/27317581@N06/3662770353/

There were also several other unusual, and possibly wild plants,
present - New Zealand willow herb (Epilobium brunnescens), pirri-pirri
burr (Acaena nova-zealandiae) and hairy St. John's wort (Hypericum
hirsutum). I'm still thinking about the speedwells that I saw.

Oops! Forgot one

5) Silene. In an earlier year there were plants labelled as Silene
gallica, with white eyes, and also white petal edges. Are these also
Silene gallica, or are they a different species.

http://www.flickr.com/photos/27317581@N06/3662769899/
http://www.flickr.com/photos/27317581@N06/3663572928/
--
Stewart Robert Hinsley