Which hazel?

Among  the scents of spring is that of witch-hazel (Hamamelis).  At Kew Gardens, I had a good sniff of the various kinds planted near King William's Temple (built in 1837).

The "chinese" variety (H. mollis) has a strong smell of oranges, and looks very orange too -

Hamamelis x intermedia -

 "Rubin" -

 Japanese witch hazel (H. japonica) -

 Appropriately, this is Sunburst -

 Frederic -

 ... and Diane -

All very fragrant.

The name has nothing to do with witches - it comes from the Old English wice, meaning bendable.

Topical application of a decoction has been used to treat swelling, inflammation, and tumours, but drinking it is not advised.