Looks dehydrated along with your soil not looking so great. This is what I would do. Go to Home Depot or Lowes and get some perlite and C&S soil. Make a mixture of 50% perlite and 50% C&S soil. Take out the plant and get all the old soil off the roots. Check the roots, if everything looks good repot in new mix. In about 5 days give your plant a good drink of water:). Remember these plants come from humid rain forests so they can take a little more water than a cactus from an arid region. I would start watering once a week, and see if your plant perks up. That's only if you have changed the soil to the mixture I gave above. Goodluck:).

ps- the white at the base is probably just salt and mineral build up. Along with a little corking from age.

Okay, thank you so much! Do I not water it right after I replant it in the new soil?

IIRC, many ppl grow holiday cacti in mostly bark? (Maybe it was only hoyas???)

Not saying that Kara suggested wrong mix! Just trying to remember options...

No because you may break roots off and this gives the plant a few days to heal. You could water in 4-5 days.

I agree with Lauren give the plant a good drink now. Repot in a few days.

Holiday cacti do need more water than arid cacti as they are by nature tropical epiphytes that grow in collected decomposing leaf litter in trees. Their soil of choice isn't one made of our regular 50/50 soil and perlite mixture, they prefer mixes higher in humus, i.e. leaf mold or even pure bark as suggested by Rina. Some do grow them in ready made orchid mixes which are rich in bark. Direct sun isn't liked either as that's what causes the purple tinge, cold temps can also do the same. Filtered sun and warmth is ideal as would be afforded by a life suspended in a leafy tree canopy.

Gill

I have one that I just put into a very rich humus loamy mix (added to perlite), and it responded by putting out new roots immediately. I thought the mix was too rich for it, but I was wrong.

Its almost like they kind of like the constant moisture, as much as a tropical plant would.

Gill: I'm glad you mentioned the purple tinge. I was wondering about that....

You need 100% orchid bark..nothing else..get clipping and start over

You need to consider your zone, climate. If I planted in 100% orchid bark I would have to water everyday, maybe twice a day. It's just too hot here. I agree with Lauren but the question is where does Rosemary live and she is growng inside.

Laura, if using fine-grade orchid bark, you wouldn't have to water everyday.

I have some in pure bark, and I don't water every day, even when it's 100F+ out, with 10% humidity.

Josh

thank you, Josh! I am glad that I learned from the best