I have a citrus seedling, right at 1 year old, that actually has a flower bud! So now a couple of questions. Is it likely to keep flowering now that it has started? I know that they typically don't start until 10 or 12 years, so I'm excited about the possibilities. The parent (at least the pimary one) was a hybrid lemon. My seed was mono-ebryonic.
See pic here: http://cid-b426ff21b024d8d6.skydrive.live.com/self.aspx/Citrus/100%5E_1630.jpg

Also, the two leaves closest to the flower bud are very different from the rest. You can really only see 1 clearly in the pic. So I'm wondering if maybe my plant has developed a sport. Except that it should be noted that the plant has no branches yet!
Which brings me back to flowering in general. I had heard that seed grown citrus doesn't typically start flowering until it is well branched..?

What gives?

Your seedling doesn't look anything like a lemon. It looks more like a grapefruit or pummelo or possibly a sour orange. Repeating what others have written here, it is common for a grapefruit seediling to produce a single terminal blossom when it is quite young like yours then not produce any more blossoms for many years.

OK. I'll write it out loud. The seed was from a Panzarella Cluster Lemon. As I already mentioned, it was a hybrid, so yes it could have grapefruit or other parentage--in addition to whatever MY seed was cross pollinated with-I did also say it was mono embryonic. My point wasn't so much "what do i have?" as "Is the wait over already?"

So I'm dissapointed to hear this is a known phenomena and therefore nothing to get excited about.

But What about those terminal leaves being different from the rest?

Heath, you must somehow be mistaken about your tree's variety. The tree shown in your link is certainly not a Panzarella Cluster Lemon. I grow the Panzarella Cluster Lemon, and its petiole does not have a wide wing as shown in your picture. The Panzarella Cluster Lemon's petiole is the thin wingless petiole that is common to all lemon varieties. I believe from all information given, your tree is a grapefruit variety. An early juvenile bloom is not all that uncommon. Unfortunately, no additional flowering is seen again for many years. The new leaves will grow to match the rest of the tree. - Millet (1,008-)

Sorry Heath, I wasn't questioning that the seed came from a lemon. I was mostly just thinking out loud. The reason I mentioned pummelo or grapefruit is because, from the appearance of the leaves, there is clearly pummelo somewhere in the parentage of your tree and the single terminal blossom on a young seedling is a characteristic of pummelo.

It is very difficult for me to see a difference in the last two leaves around the blossom from your picture because of their small size, the camera angle relative to the leaves, and the fact that they are leaning somewhat against the blossom.

Here is a post of a similar seedling with a single terminal blossom grown by Mike aka citrange that he posted on this forum a little over a year ago. His seedling produced a small fruit as you can see in the picture.

link

After reading jrb's post I must agree with him. I will change my above post from grapefruit to pummelo, due to the size of the petiole shown on Heath's link which is larger than a grapefruit. - Millet (1,008-)

First, here are 2 updated images of my seedling. I tried to get a better shot of the newest leaves.
http://cid-b426ff21b024d8d6.skydrive.live.com/self.aspx/Citrus/100%5E_1693.jpg
http://cid-b426ff21b024d8d6.skydrive.live.com/self.aspx/Citrus/100%5E_1694.jpg
The bloom smells awesome.
Here is the story.:
I have been to Mr. Panzarella's home on several occasions. ((Grafting class, though unsuccessful for me; and a citrus tasting)) There is no doubt that the seed I planted is from the Panzarella Lemon. However, as I mentioned, It sprouted as Mono-embryonic and therefore I realize is to likely be different from the parent. With his large collection, there is no telling if it cross pollinated with something else, or reverted to one of it's original(unknown) parents.
But thank you for the input. I will wait patiently to see if the one bloom makes some sort of fruit, and will decide if it is worth keeping based on that.
Which is really what I was after. Is it worth keeping?????

I'm convinced both his "lemon" and "orange" have pummelo in their background. What else could explain the fruit's large size? John thinks ujukitsu lemon is a parent.