They're liverworts, primitive plants allied to mosses. The "octopus suckers"
are the fruiting bodies that will release spores. Liverworts don't really do
any damage but they can become very abundant and may make watering from
above rather difficult. A little touch of iron sulphate, just half a pinch
on the surface, will knock them back.

Geoff Bryant
www.hortiphoto.com


"Bob Smith" wrote in message
...

http://myweb.tiscali.co.uk/spikewill.../whatsthis.jpg

It looks like some kind of succulent, and it has "octopus suckers" on the
leaves. Looks like some kind of alien plant.

Is it a problem, or should I leave it?

TIA

Bob