Apologies that today's entry is so late – I was updating the garden's web server last night, and ran into some difficulties that eventually spiralled into the site being entirely unavailable for twelve hours. Anyway, it's obviously up and running again, and everything is mostly working fine, though there are still a few troubles, so a short entry today.
The common name for this tomato relative is “kangaroo apple”, which hints at its native distribution: Australia and New Zealand. This plant is grown as an annual in the alpine garden, though it often survives a mild winter and persists as a perennial. The “Plants for a Future” database has a good account of the plant: Solanum laciniatum.