It appears to be a monstera blossom.

You're right! Thank you Kendrah. One thing that puzzles me [from research I just did] is its use as a houseplant. Here in the beautiful San Gabriel Valley, it gets HOT, I mean sizzling--110° or more--any time of year; it's November and we've seen 100+ temps in the last couple of days. Also, it's often windy and always dry. How can it survive those conditions and also thrive inside?

" Its leaves are huge, and not solid. "

Does that mean the leaves have openings or holes in them? If so, Monstera adansonii is a strong possibility.

The plant is native to warm, tropical, jungly areas so heat is not an issue. Lack of humidity and too much sun can be. Most common houseplants are tropical plants that cannot tolerate cold winter temps and can easily adapt to indoor conditions with some qualifications.

FWIW, these plants rarely ever bloom when grown as houseplants and not all that frequently growing in the wild. I think you just got lucky!!.

"Lack of humidity and too much sun can be."

I must be extremely lucky! It's not only survived extreme heat AND droughts AND full sun AND no humidity, yet it's blooming. There's at least one other bud starting to open.

They bloom here in San Francisco, and in Palm Springs. They’re not that fussy.

Did you know that the flowers generate heat to waft their fragrance about? The fruit generates heat too.

I have this plant in my garden here in Florida. It is Philodendron split leaves looks like monstera.

It’s called Swiss Cheese Plant also know as Mexican Breadfruit or Split-leaf philodendron, a hardy perennial that is good for beginner gardeners. It doesn’t need much care aside from regular watering. It takes partial sun, so it can be planted out in a more shady area, but it is more suitable inside at an East or Southeast facing window. It’s a wonderful plant to have.Enjoy it.