. Plant studies; an elementary botany. Botany. THE GKEAT Gli(.)UPS OF AUiM '2rA. feet long, M'liose stalk develops root-like holdfasts (Fig. 218). The largest body is developed by tin Antarctic Lkmiliaria form, which rises to the surface from a sloping bottom with a floating thallus six hundred to nine hundred feet long. Other forms rise from the sea bottom like trees, with thick trunks, numerous brandies, and leaf-like ai^peudages. The common Fiiriis, or " rock weed," is rib- bon-form and constantly branches by forking at the tip (Fig. 219). This method of branching is called diclio
. Plant studies; an elementary botany. Botany. THE GKEAT Gli(.)UPS OF AUiM '2rA. feet long, M'liose stalk develops root-like holdfasts (Fig. 218). The largest body is developed by tin Antarctic Lkmiliaria form, which rises to the surface from a sloping bottom with a floating thallus six hundred to nine hundred feet long. Other forms rise from the sea bottom like trees, with thick trunks, numerous brandies, and leaf-like ai^peudages. The common Fiiriis, or " rock weed," is rib- bon-form and constantly branches by forking at the tip (Fig. 219). This method of branching is called dicliotoiiwus, as dis- tinct from that in which branches are put out from the sides of the axis {)i!ijjio])(idi(iI). The swol- len air-bladders distrib- uted throughout the body are very conspicuous. The most dilfereuti- ated thallus is that of (Fig. 220), or " gulf weed," in which there are slender branch- ing stem-like axes bearing lateral memlDcrs of various kinds, some of them like ordinary foliage leaves; others are floats or air- bladders, which sometimes resemble clusters of berries; and other branches bear the sex organs. All of these structures are but different regions of a branching thallus. Sargassian forms are often torn from their anchorage by the waves and carried away from the coast by currents, collecting in the great sea eddies. Fig. :?10. Fragment of a common brown aiga iFi'cusi, sliownig rho bodj- with rlicbotomons branching and bladder-like air-bladders.—After 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 Coulter, John Merle, 1851-1928. New York, D. Appleton and Company
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