The elements of botany for beginners and for schools . fresh-water species, by Prof. H. C. Woodss Fresh-water Algae of NorthAmerica, a larger and less accessible volume. A few common forms arehere very briefly mentioned and illustrated, to give an idea of the they are of almost endless diversity. 508. The common Rockweed (Fucus vesiculosus, Fig. 554, aboundingbetween high and low water mark on the coast), the rarer Sea Colander(Agarum Turneri, Pig. 553), and Laminaria, of which the larger formsare called Devils Aprons, are good representatives of the olive green orbrownish Seaweeds.
The elements of botany for beginners and for schools . fresh-water species, by Prof. H. C. Woodss Fresh-water Algae of NorthAmerica, a larger and less accessible volume. A few common forms arehere very briefly mentioned and illustrated, to give an idea of the they are of almost endless diversity. 508. The common Rockweed (Fucus vesiculosus, Fig. 554, aboundingbetween high and low water mark on the coast), the rarer Sea Colander(Agarum Turneri, Pig. 553), and Laminaria, of which the larger formsare called Devils Aprons, are good representatives of the olive green orbrownish Seaweeds. They are attached either by a disk-like base or byroot-like holdfasts to the rocks or stones on which they grow. 509. The hollow and inflated places in the Fucus vesiculosus or Rock-weed (Fig. 554) are air-bladders for buoyancy. The fructification formsin the substance of the tips of the frond: the rough dots mark the placeswhere the conceptacles open. The spores and the fertilizing cells are indifferent plants. Sections of the two kinds of concepta
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1887
