It looks like and upside-down Christmas tree with all branches flowing downward. The upper branches grow longer than the lower ones. It started out about one foot tall and is now about five feet tall. I have a picture that I think I can copy into an e-mail to you but can't seem to get it on this page.
It is a Norfolk Island Pine tree and here is how to care for it.
And here is a collection of articles:
They grow slowly and need to be repotted every two to four years. This information should help:
I have had this tree about 4 years, I use a moisture meter to tell me when to water it. I think the tree is root bound. This tree is never outside. It is happy in front of our patio window with the south sun
You are in that range, now! I think that you should repot into a slightly larger container, or trim off the bottom 1/3 of root mass, and repot into the same container with fresh soil to maintain size.
The tree is over 40 years old.
Conditions must have been just right, i.e., weather, sufficient male flowers for pollination of the female flowers. Seeds take a year to mature so it's possible there was some overlapping of years. Here is more:
I have this plant going on the third year. Purchase during Christmas time two years ago. It was full and beautiful and was growing. It was dropping little black seeds and remained in the container I had planted it in once it grew a bit. But this past year it has stopped dropping seeds and it’s getting very bare. It is in an alcove facing south but just gets bright light but not scorching light. I love this plant and would like to see it but I’ve again. I water it every Sunday but make sure there’s drainage. Any suggestions you may offer would be very much appreciated. OK I can do that
It may be getting too much water. Instead of watering once a week, wait till the soil on top is dry. Also, these plants require humidity. A pebble tray will help. For more on its care, see below:
How much light direct or indirect light, how often to water and what else do I need to know about?
These articles should help: