The seven weeks fern or leather-leaf fern, Rumohra adiantiformis, grows in nature in places as widespread as Europe, Africa, South America and Australia. The sori or reproductive clusters of spores of this plant appear on the underside of pinnae (leaflets) on all the fronds, not only on specialised reproductive fronds, as is the case in several other species.
This is a sought after species among florists who value the long living deep green fronds that do not wilt. It is a hardy plant used in shade or semi-shade spots, even hanging baskets, in well watered gardens. In nature it is found on moist forest floors and among boulders near water (Wikipedia; www.plantzafrica.com).