Lenticular

The sporophyte foot is also characteristic: it is very broad and more or less lenticular or disciform, as broad or broader than the calyptra stalk[…]

The [Royal Albert] bridge itself has approach viaducts on each side, before two 455ft lenticular trusses span the main part of the river, which is 80ft below.

lenticular photography

But establishment on the fringes of everyday practice doesn't mean lenticular photography is a failure. On the contrary, the process manifests resounding cultural success through its longevity.