A small size, tufted, evergreen fern with broadly triangular blades, hence the name. The common one alludes to the golden backs of the leaves, glittering in the sun when the leaves curl up in the dry season (like shown in the image).
The perfect fern for the rockery, it can also grow in full sun! Probably not hardy in zone 5 but otherwise I wonder why is not cultivated more; worth to give it a try.
Germination: growing ferns from spores is not difficult but requires a different technique than sowing seeds. If you are new at this check out this article about growing ferns from spores from the American fern Society.