. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . ed with a beautiful arrangementof paraplujseSj or threads, some of which hold spores, whileothers protrude through a small opening in the outer Conceptacles are peculiar to the order Fucacese. In themspore-production is carried on in a manner as complicated as isthe formation of seeds in flowering plants. Although rockweedsare such a conspicuous feature of sea-shore vegetation, two speciesonly, Fucus vesiculosus and Ascopliyllnm nodosum (formerly calledFucus nodosus
. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . ed with a beautiful arrangementof paraplujseSj or threads, some of which hold spores, whileothers protrude through a small opening in the outer Conceptacles are peculiar to the order Fucacese. In themspore-production is carried on in a manner as complicated as isthe formation of seeds in flowering plants. Although rockweedsare such a conspicuous feature of sea-shore vegetation, two speciesonly, Fucus vesiculosus and Ascopliyllnm nodosum (formerly calledFucus nodosus), are common on the Atlantic coast, and these donot occur south of New York, owing to the fact that a longstretch of sand-beach extends beyond that point. F. vesiculosus. Midrib distinct through all the forked branches ;margin entire, often wavy ; air-vessels spherical or oblong, usually inpairs along the midrib ; receptacles on terminal branches, which areswollen and filled with gelatinous matter, heart- shaped or forked, inoblong or pointed divisions ; frond tough and leathery, often two feetlong. (Plate XIV.). ILATE XV. Fucus serratus. Fucus ceruuoides. Ascopliyllum nodosum.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmarinea, bookyear1901
