Trachycarpus fortunei is one of the more common palms in the UK today, with maybe the exception of the Canary Island Date Palm in recent years but it is perhaps the only completely hardy palm anywhere in lowland Britain, although maybe incredibly slow growing in the cooler parts.
It is a vary variable palm with leaves ranging from just over 1 to 4 feet in diameter. From wagnerianus delta shaped to fully 360 degree circular fans. There has been debate for many years about whether wagnerianus is just a bred variation of fortunei, and even debate over whether small leaved fortunei are actually wagnerianus. I'm not trying to decide that debate, but the purpose of this topic is to show the natural variation of Trachycarpus fortunei. Now you may say that there are several subsets of the species and this accounts for any variation we see, but my observation is based on my two oldest T. fortunei which have been producing seed for about 15 years now, and particularly in the variation in the seedlings. This dispels an theory of subspeices, or regional variation, accounting for differences in leaf size and shape. The seedlings from the 2 trees are widely variable.
This is Trunky Trachycarpus, a male, now 38 years old and about 18ft tall. One of the first in the UK to have a stripped trunk in 1993. It's leaves are small only 20" in diameter with a mild delta shape. In the past I thought this was a waggie first cross, but that is open to debate. Flowering since 1989.
This is Trudi Trachycarpus, a female, now 29 years old and also about 18ft tall. However, it is the opposite of trunky with a huge crown of 4 ft diameter leaves, not delta, more rounded. Also with a stripped trunk. Flowering and producing seed since 1994, and self sown seed germinating since 1997.
You can see the male and female are chalk and cheese, but the seedling are any variation between the two and beyond, from small leaved waggie looking to large leaved fully circular
Starting with the oldest self sown seed grown now in it's 10th year forming a trunk with huge 42" circular leaves. This is at the base of Trudi (mother)
Next is a self sown seed grown in it's 9th year with 36" almost circular leaves. This is in the back garden next to the patio. Don't know how the seed got there.
Then the oldest seed grown was collected from Trudi before they started to self sow, 1994. Where I gave most of the seedlings away I hung onto this one because it looked different. It had a long petiole and very short leaf blades. After 4 years it looked like this.
The leaves were more rounded when young, but have become more delta shaped. At 15 years it has 14" very stiff, acutely delta shaped leaves, and now is starting to form a trunk. This is slower growing but it is still in a tub rather than in the ground.
This is my favourite Trachycarpus fortunei leaf. I think it is the symmetry and that the leaflets are more deeply and evenly split than on most. This is a 5 year old self sown seedling that was dug up and potted 3 years ago.
This is the most common form of young Trachycarpus fortunei leaf, also a 5 year self sown seedling. The leaf is divided into sections of leaflets in a rather asymmetric way.
Show us your Trachycarpus fortunei leaves 
. Here's two of mine. Trachycarpus 1 is very tall and elegant while Trachycarpus 2 is squat and ugly sister like 
