The cupping and distortion of new foliage is often the result of pest infestation....aphids, mites, erythroid mites are all culprits. Inspect the underside of affected leaves carefully, especially inside the little nooks to look for debris. A cheap magnifying lens can be helpful.

Thanks for the tips. Maybe my eyes aren't the greatest - and I'm not experienced about what to look for - but even with 3x-5x magnifiers can't see anything obvious. Nothing moving. These plants always have seemed a bit milky-sappy-stringy, so the whitish fuzz under the leaves doesn't seem out of place. There are small dark gray-ish (or light blackish) spots under some of the leaves. Not sure if that could just be sprinkling of the potting mix, or really tiny sessile parasites or fungus.

In the lower left of this post's photo the small topmost new leaves (left of previous posting photo) have died off. The rest are just underside views of leaves, which don't seem remarkable.

...might have to think about re-starting from seeds.

the first pic.. directly above...

brown scarring on the back is evidence of sucking damage ...

or its a bad camera angle ...

ken

Interesting. Thank you. If it's of interest, a link to a bigger version of the pic is

Not sure where a new pest or disease came from, but if there is no positive change by this weekend, guess I'll get rid of these, and start some from seeds.

Here is a link that might be useful: pic linked a different way