The study was carried out to investigate the taxonomic occurrence of Pteridophytes in Lafia and Doma Metropolis of Nasarawa State, Nigeria. A total of 16 locations were sampled in Lafia and Doma respectively. These locations include wetlands, swamps, forest shade and trees. From these locations, ferns were collected, pressed and identified. Their relative abundances in each location were calculated and their ethnobotanical uses by the local dwellers were documented using structured questionnaires. Ferns were observed only in 12 locations in Lafia and nine locations in Doma. Seven species of ferns were identified namely, Pneumatopteris afra, Nephrolepis biserrata, N. undulata, N. cordifolia, Adiantum capillus-veneris, Adiantum sp. and Pityrogramma calomelanos. Pneumatopteris afra was found to be the most widely distributed fern. Of the ferns observed, terrestrial ferns had the highest occurrence (85.7%) in Lafia with only 50% in Doma. Pneumatopteris afra was found to have the highest relative frequency while Nephrolepis biserrata and N. undulata had the lowest relative frequency in Lafia and Doma. All these species have been reported by the local dwellers to have ethnobotanical uses such as in the treatment of ulcer, fever, typhoid, chest pain, stomach pain and diabetes. Also, Pityrogramma calomelanos had the highest percentage awareness by the local dwellers. It is concluded that Lafia is more rich and diverse in fern species than Doma. Locations where ferns were absent are due to the long-term alterations in the microclimatic conditions by various human activities in those places.
Phytosociological notes on the fern-meadow vegetation of mid-west Scotland and the Netherlands
On the basis of five phytosociological relevés, the fern-meadow vegetation with Oreopteris limbosperma and Dryopteris cambrensis from the region around Oban, Argyll, West Scotland is described and compared with similar communities in the Netherlands and West Germany. It is concluded that these fern-meadows can be assigned to the Luzulo luzuloides–Thelypteridetum limbospermae, which in Central and continental West Europe is restricted to forest edges. In West Scotland this community is also common in open landscapes, due to the hyperatlantic climate. In comparison with the fern communities in the Netherlands and Germany, the Scottish examples are very rich in fern species, illustrating the optimal development of the community in West Argyll. Possible future development of this community in the Netherlands are discussed in the light of the increase in records of Oreopteris limbosperma and the ecological requirements of Dryopteris cambrensis.
Marsilea aegyptiaca (Marsileaceae) on the Mediterranean island of Elafonisos (Laconia, Peloponnese, Greece)
The water-clover species Marsilea aegyptiaca was first detected on the Mediterranean island of Elafonisos (Peloponnese, Greece) nearly 25 years ago. This was the first record for the species as part of the European flora. Recent work has shown that M. aegyptiaca still occurs at the site, and data are presented concerning its identification, habitat and distribution. Morphological characters of all known European species within the genus are compared.
Hypodematium crenatum subsp. crenatum (Hypodematiaceae): a new distributional record for Gujarat State