||‘Corymbiferum’ varieties have crests on the tips of the pinnae and frond apex. The crests are NOT flat but are in several planes. If the apical crest gets larger than the width of frond it then becomes a ‘Grandiceps’. See also ‘Glomeratum’ and ‘Gemmatum’.
||Generally as for species. Will grow in most soils but prefers acid conditions; as someone says in good “woodland duff”. Also best in light shade but will tolerate some sun in the morning and evening, or more if in damp conditions.
||Roger Golding / Julian Reed
The website of the British Pteridological Society