One of my Salce cuttings has developed cauliflower-like growths (my other Salce cutting, rooting separately, has none).  I think these are lenticels that have swollen/grown to facilitate gas exchange, probably from excessive moisture and not enough oxygen, but I'm not certain. 

Are these in fact swollen lenticels?  Do I need to remove these white growths, or should I leave them on?

Your cutting looks perfect to me

it's gets little messy, but it's fine. good roots will come through there. 

sorry but I thought this is a normal thing for fig cuttings, you can wash them off if they scare you off, they are not roots but roots will come out from those areas

Much has been theorized by several members as to the what & why cuttings often do this. The answer? I dunno.  

In my experience though, there is no reason to remove it. Just let the cutting keep doing its thing ;) . 

That looks suspiciously like my writing on that Salce cutting :-J .

When I use paper I try proping the cuttings with a pen or another cutting sideways, that helps air go around them. Mine only formed those whitish things when I had the cutting wrapped up for too long.

i've noticed that thicker cuttings tend to do that more often. there was a set of cuttings from one of the member. it was an unknown. and that thing had so much of that stuff on it, the baggie was getting really messy. but the cutting grew extremely well and all made it into being trees. i think i gave away 2 and have 1 left. 

hmmm, I had those type of white in last summer when i was trying to root fig branches in bucket of water, they had a lot of the white stuff but no roots. so, I washed them away and threw some Miracle grow potting soil in the bucket and let the branches sit in it for a month.finally some roots started to appear but also the edges of cut area started to melt and get goowie . After that I always dip both ends of the  cuttings in Paraffin to avaid melting or drying out. it worked.

Thanks for the replies everybody.  Glad to hear the growths aren't something detrimental that I need to scrape off. 

And thanks again to you, Bill, for hooking me up with the Salce!  Of the four varieties I got from you (all wonderfully packaged btw), it's the one I'm most looking forward to sampling.  Hope I get some pretty red color, too, like omotm got.

If mine i would leave them some of them can have roots come out of them, also some will turn brown and fall off by themselves.
I have inverted pictures from some years ago showing a few in early stages of roots poking thru them.