Osmunda japonica

Osmunda japonica, doubly pinnate fronds

Osmunda japonica is a plant of the genus Osmunda ( Osmunda ) within the family of Königsfarngewächse ( Osmundaceae ). It is native to East Asia.

Features

Osmunda japonica is a deciduous, perennial herbaceous plant that reaches the plant height of 20 to 50 centimeters. Very young, curled fronds are densely covered with long, flat hair. It forms two different fronds: sterile and fertile; rarely is a fertile section on the sterile fronds on the same.

The sterile fronds are 50 to 80 inches long and twice - pinnate. The almost sessile leaves of the sterile fronds are 4-6 cm long and 1.5 to 2 cm inches wide. The bald or slightly hairy leaves have a slightly serrated edge.

The fertile fronds, the sporophylls, are 20 to 50 inches long and twice - pinnate. The sporangia are borne in dense groups on the rachis of the first order sheet sections.

Occurrence

Osmunda japonica is native to East Asia, especially in Japan, China, Korea, Taiwan and Russia's Far East only on Sakhalin. Osmunda japonica thrives in moist forests and requires a lot of sunlight.

Taxonomy

The first publication of Osmunda japonica was carried out in 1780 by Carl Peter Thunberg in Nova Acta Societatis Scientiarum Regiae Upsaliensis, 3, pp. 209 A homonym is Osmunda japonica Houtt. published in Maarten Houttuyn: Natuurlijke History, 2 ( 14), 1783, p 57, Plate 97, Figure 1 Osmunda japonica Thunb synonyms for. are: Osmunda biformis ( Benth. ) Makino, Osmunda regalis subsp. japonica ( Thunb. ) Á.Löve & D.Löve, Osmunda regalis var biformis Benth., Osmunda regalis var japonica ( Thunb. ) Milde, Osmundastrum japonicum ( Thunb. ) C.Presl.