unknown hairy plant

[Diane Clement]

Can anyone identify this, it was coming up in a pot of arisaema seedlings.  It looks sort of familiar but I can't really think what it is.

[Roma]

Kiwi?

[manicbotanic]

is it saruma henryi ?

[Diane Clement]

is it saruma henryi ?   

An interesting thought, and it had actually crossed my mind, but seemed a bit unlikely!  I do have two pots of Saruma, but this pot was nowhere near them.  I'll try and compare in daylight tomorrow.

[Maggi Young]

an Aristolochia?

[Diane Clement]

an Aristolochia?   

Even more unlikely here   
but then, Saruma is, of course related to Aristolochia or it was the last time I looked, unless those d.....d taxonomists have been fiddling about   

[Maggi Young]

Are the leaves not opposite in Saruma? 

[Lesley Cox]

Some kind of Convolvulus or morning glory?

[TheOnionMan]

It looks like a dead ringer for Saruma henryi to me.  If the potted plants had flowered and made seed, I find that seed of this can "get around"... not sure what the dispersal mechanism is, but they can come up here and there far flung from the original.

Maggi, you're right, Saruma henryi has opposite leaves, although on basal leaf and stem growth, they initially make alternate leaf growth, same thing with cauline leaves near the tip of flowering growth which can be alternate too, but of course only the former applies here.

[Diane Clement]

Yes!!!!  I am now pretty sure this is Saruma henryi.  Thanks to ALL who threw their ideas into the ring, and gold stars to manicbotanic and McMark.

And yes, Mark's observations about the leaves are spot on.  On my mature plants, the upper leaves are alternate, and the lower ones not. 

Amazingly this was solved in about 4 hours from posting, and the thread has been viewed by 120 people in less than 24 hours.  The knowledge in this forum is astonishing!