. The algae-vegetation of the Faero?ese coasts, with remarks on the phyto-geography. Marine algae. 734 cannot produce receptacles in this unfavourable habitat. The Hi- 777a/?//2a//a-association is so diaracteristic on exposed coasts, that a luxuriant growth of this alga is a sure sign of the presence of surf. It is an association particularly fitted for resisting the dashing of the waves; the surf constantly washes over the association at low tide, and the metre-long, pliable, elastic receptacles of the Himanthalia follow resistlessly the movement of the sea. Himaii- thalia cannot stand to be
. The algae-vegetation of the Faero?ese coasts, with remarks on the phyto-geography. Marine algae. 734 cannot produce receptacles in this unfavourable habitat. The Hi- 777a/?//2a//a-association is so diaracteristic on exposed coasts, that a luxuriant growth of this alga is a sure sign of the presence of surf. It is an association particularly fitted for resisting the dashing of the waves; the surf constantly washes over the association at low tide, and the metre-long, pliable, elastic receptacles of the Himanthalia follow resistlessly the movement of the sea. Himaii- thalia cannot stand to be dry for any length of time; when found. Fig. 155. The \\on. Besides plants with receptacles, young plants are seen. The sub- vegetation consists of Gigartina mamillosa, Polysiplionia urceolata. Acrosiphonia, Corallina, etc. The illustra- tion is taken from Midvaag. (F. B. phot.) on a sheltered coast, where however it is rare, it always grows sublittorally in low w^ater and often has another appearance. The receptacles are uneven, sometimes inflated, and the colour of the plant becomes a lighter yellowish-brown. As a subvegetation to the //zma/^^/irt/zo-association, Gigartina mamillosa, Acrosiphonia, Polysiphonia urceolata, and others often oc- cur besides Corallina (see fig. 155). Elachista scutulata has occa- sionally been found growing on the receptacles, and on the old plants a great many epiphytes are sheltered, especially species of Ectocarpus e. g. E. fasciculatus, E. Hincksice, E. tomentosus and E. litoralis, species. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Børgesen, Frederik, 1866-1956. Copenhagen, Printed by H. H. Thiele
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmarinealgae, bookyear
