A new and distinct x Phlebosia cultivar named Nicolas Diamond which is characterized by a fast rate of growth, improved cold hardiness and drought tolerance, with dark green pinnatifid leaves which are curled downward toward the apex, and the stability of these characteristics from generation to generation.

A new and distinct x Phlebosia cultivar named Nicolas Diamond which is characterized by a fast rate of growth, improved cold hardiness and drought tolerance, with dark green pinnatifid leaves which are curled downward toward the apex, and the stability of these characteristics from generation to generation.

A new and distinct x Phlebosia cultivar named Nicolas Diamond which is characterized by a fast rate of growth, improved cold hardiness and drought tolerance, with dark green pinnatifid leaves which are curled downward toward the apex, and the stability of these characteristics from generation to generation.

A new and distinct Asplenium antiquum cultivar named VITASPHUR which is characterized by strongly carinate leaves, moderately undulate leaf margins, a unique growth habit with leaves that twist and curl in a clockwise orientation, and the stability of these characteristics from generation to generation.

A tissue culturing method includes following steps: providing a chopped gametophyte, generating calluses by culturing the chopped gametophyte, and performing apogamic regeneration of sporophytes, by culturing the calluses in a culture fluid to develop the sporophytes from the calluses. The present invention also provides a tissue culturing method of ferns and an explant.

A new and distinct Adiantum cultivar named TASSELS is disclosed, characterized by unique clusters of pinnae forming at terminus of fronds on mature plants, creating a different ornamental appearance due this this distinct morphology. Fronds are pendulous, large and composed of large pinnae. Plants of the new variety have been observed to recover rapidly and entirely from die back caused by drought. The new variety is a Adiantum, typically produced as an ornamental plant.