in the 1930's, the Himalayan originated from a cross between a Persian and a Siamese. The goal was to get a long-haired cat like the persian with the color-pointed color of the siamese. With the intial cross, you'd get a solid, short haired cat because short hair and solid colors are dominate. So kittens from these litters were bred together until you got long-haired color-pointed cats. The Himalayan eventually became its own breed, recognized by the CFA in 1957. A long time ago they didn't have the extremely thick, long-haired coat and extreme flat face like they do today. The himalayan was bred back to the persian several times to get the cobby body, long thick hair, large head, large round eyes, and extreme flat face. Eventually they looked just like the persian in body-type with a color-point pattern. In 1984, the CFA combined the Himalayan and persian breeds - Himalayan is a color division under the persian breed.
this is a picture of the first Grand Championed Himalayan in the CFA back in the 1960's
http://www.ristokat.com/Gallery/ChestermereKinuba.htm
You can see he has a longer face and not quite as thick of a coat
Here is a picture of my cat Sophie's grandmother who is a grand champion and highest scoring chocolate point in the CFA
http://www.newdestiny.us/star.html
Now Himalayans are shown with an extreme face
It took a lot of very selective breeding to get that extreme look to the show cats of today. Without selective breeding, there area a lot of himalayans and persians with longer faces and shorter coats. So Flower could very well be full-Himalayan, just resembles the past Himalayans more than the current look of them.
Anyway, whether she's a full Himalayan or not, she's a pretty kitty cat, and I hope the birth goes well. I'm looking forward to updates. I love having YT to talk about my yorkie, but I wish there was a site to talk about HImalayans. I love talking about my cats too!