I don't really know, either. But, this type of leaf and fruit was identified as Camellia Azalea in an older garden stack member post. I found it while I was searching "camellias" on google because the "fruits" or "nuts" look like the ones on my own camellia japonica (but the leaves are different than Camellia Azalea). I will post the other member's pictures, and look for separate confirmation.
I see from further research that is also called "Camellia Changii", and one site said that it was pretty rare and new in the USA. This may possibly be grafted onto different root stock (although apparently that is still challenging experts.)
It seems likely that the ritzy Palace Hotel could afford such a gem.
I look forward to confirmation from them about whether it is a camellia azalea, a magnolia, or neither one. (I also see that there are many members of the "theaceae" family that look similar, but I do not see such a close match to leaf type.)
Here is the link to the enlarged google street view that I posted above. You can see the fruits. https://firstname.lastname@example.org,-122.402262,52.99h,4.64p,2z
From a post 3 years ago-
What are these sphere-like things on my Camellia azalea tree?
More pics here- It has the same leaves.
Camellia Changii- https://www.flickr.com/photos/kamelienfreunde/20391131664 Camellia changii (syn. Camellia azalea)
This remarkable species was discovered in 1984 and was introduced into the United States recently. It is now in a few public gardens and in the hands of commercial growers and breeders but, in 2015, is not yet available in nurseries or catalogs. The bright red flowers may be produced throughout the year, including summer months. It is reported to grow to about eight feet tall. Reportedly, flower size varies. The largest flowers are four to five inches across. With its summer flowering season, this plant could be a very important addition to the world of camellia gardeners. However, it is reported to be challenging to propagate and camellia hybridizers are having difficulty crossing this species with others in the genus.