. Science of the sea. An elementary handbook of practical oceanography for travellers, sailors, and yachtsmen. Fig. 63.—Dictyota Dichotoma. (After BORNET AND THURET.) ^W The sorus above with, motionless eggs, F[G. 62.—Saccorhiza. below with antheridia. 10 146 THE PLANTS broad basal leaves, and long branching shoots of a secon-dary order, with, as a rule, leaves of different size, airvesicles, and special fruiting branches. When basaland upper leaves differ from each other the transitionis gradual. The fruiting branches bear conceptaculawhich are highly differentiated in the different
. Science of the sea. An elementary handbook of practical oceanography for travellers, sailors, and yachtsmen. Fig. 63.—Dictyota Dichotoma. (After BORNET AND THURET.) ^W The sorus above with, motionless eggs, F[G. 62.—Saccorhiza. below with antheridia. 10 146 THE PLANTS broad basal leaves, and long branching shoots of a secon-dary order, with, as a rule, leaves of different size, airvesicles, and special fruiting branches. When basaland upper leaves differ from each other the transitionis gradual. The fruiting branches bear conceptaculawhich are highly differentiated in the different some species the branches with male conceptaculaseem to be cylindrical, and those with female concep-tacula dentate, but this question must still be carefullyinvestigated. It is important, because J. G. Agardhdivided the Sargassa into various groups, according tothe form of the conceptacula-bearing branches. The genus Sargassum has approximately 150 species,and is distributed over the warmer temperate andtropical seas ; it is especially frequent on the coast ofAustralia. One species has for four cen
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectocean, bookyear1912
