Pseudocyclosorus

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Pseudocyclosorus

Distribution

Asia-Tropical:, Philippines (Philippines present) Ceylon: present Japan: present Luzon: present Madagascar: present Mascarene Islands: present N. India: present S. India: present Tropical Africa: present
About 11 spp. Tropical Africa, Madagascar, Mascarene Islands, S. India&Ceylon, N. India to Japan; in Malesia: Philippines (Luzon).

Cytology

Chromosome numbers 35 and 36 both reported. P. tylodes, diploid (36, Ceylon and N. India); P. esquirolii and P. repens, both diploid (35, N. & S. India); P. ochthodes, diploid (35 and 36 both reported from India). There are erroneous records in Löve, Löve & Pichi Sermolli, Cytotaxonomical Atlas of Pteridophyta, p. 221.

Notes

This genus differs from Pneumatopteris in having veins always free, lamina never pustular when dry, sporangia lacking glands or setae on body. Because of the position of basal veins in relation to the sinus-membrane Ching (1963) thought Dryopteris patens (Sw.)O. KTZEand D. normalis (Sod.)C. Chr. of Tropical America should probably be included in Pseudocyclosorus, but in my judgement these species, and some others allied to them in Africa, are better regarded as constituting a section of Christella (see ). Clarke (1880) united all species of Pseudocyclosorus in N. India under the name Nephrodium prolixum, based on Aspidium prolixum Willd., but Willdenow's type is a species of Christella from New Caledonia ().

Citation

Holttum - in J. S. Afr. Bot. 1974: 137