. The British fern gazette. Ferns. 322 BRITISH FERN GAZETTE: VOLUME 10 PART 6 (1973) Adiantum hispidulum Swartz o/L/F Said to be subspontaneous which fits well with our observations. We saw the plant three out of seven times growing on walls inside settlements (Ponta Delgada, Povoacao) although it is evidently spreading to natural habitats wall of the gorge hear Ribeirinha and near Caldeiras. Pteris serrulata Forsskal o / L, M / W Fig. 5 In steep, woody ravines on moist, well aerated soil with good humus content in cool, damp habitats. Reaching a man's height, it therefore even grows betw
. The British fern gazette. Ferns. 322 BRITISH FERN GAZETTE: VOLUME 10 PART 6 (1973) Adiantum hispidulum Swartz o/L/F Said to be subspontaneous which fits well with our observations. We saw the plant three out of seven times growing on walls inside settlements (Ponta Delgada, Povoacao) although it is evidently spreading to natural habitats wall of the gorge hear Ribeirinha and near Caldeiras. Pteris serrulata Forsskal o / L, M / W Fig. 5 In steep, woody ravines on moist, well aerated soil with good humus content in cool, damp habitats. Reaching a man's height, it therefore even grows between Hedychium. At first glance it may be taken for Woodwardia, but there are good differences in the marked enlargement of the lowest pinnae (katatony), the lack of the net venation, and the typical arrangement of the submarginal sori. Pteris vittata L. r/ L, (M) / F In fissures of rather damp walls and rocks, as at Caldeiras and near the waterfall of Povoacao. If the water supply is less, the leaves are very small. Anogramma leptophylla (L.) Link c / L / F, S Always with sporangia. In wall fissures where they contain fine earth; exuberant on open places on slopes, even in grooves; often together with liverworts. Though often together with Asplenium species, it is not really a chasmophytic plant. It tolerates all positions; we found it even on open lava rocks with little earth near the surface (near Rabo de Peixe); but it grows best in positions other than south. Pityrogramma chrysophylla (Swartz) Link r/L, M/S, F Fig. 4, 10 It was one of our most exciting experiences when we found a tuff wall, warm by gas-exhalations, which was sprinkled with young plantlets of this tropical fern with its golden-dusty leaves. At the same locality, the Lagoa das Furnas, there are also many adult plants on the southwestern slope. Again at Caldeiras this species lives near the fountains under the influence of the warm damp air, where we found plants of the size of our Male ferns. In the literatur
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