Hello, The Teddybear Magnolia, [magnolia Grandiflora] ?

There is also a sunflower called Teddybear - I have just planted some seeds. It is a small sunflower with lots of petals.

Or possibly 'Tumbling Ted'? (Saponaria ocymoides)

We also have the Teddybear Cholla, here, but I can't think of any good reason to grow it in the UK...ooh! Ow! Ouch!!
: D

Unless you're thinking of Acanthus, commonly known as Bear's Britches/Breeches.