. The algae. Algae. 11 Fig. no Durvillea antarctica. A-E, young plants ( x if), F, dia- gram of tissues, black = secondary cortex; dots = unswoUen hyphae; plain = medulla. G-I, stages in swelling of longitudinal hyphae (G, H x26o; I X i6o). J. of meristoderm and cortex (hy=hypha) ( x 170). K, oogonium L, M, oogonium liberating ova ( X 180). (After Naylor.) possesses very much the appearance of a Laminaria. This applies to all four species (five if one includes Sarcophycus potatorum of Tasmania). The large solid stipe arises from a scutate holdfast and very soon passes into a flat, expan
. The algae. Algae. 11 Fig. no Durvillea antarctica. A-E, young plants ( x if), F, dia- gram of tissues, black = secondary cortex; dots = unswoUen hyphae; plain = medulla. G-I, stages in swelling of longitudinal hyphae (G, H x26o; I X i6o). J. of meristoderm and cortex (hy=hypha) ( x 170). K, oogonium L, M, oogonium liberating ova ( X 180). (After Naylor.) possesses very much the appearance of a Laminaria. This applies to all four species (five if one includes Sarcophycus potatorum of Tasmania). The large solid stipe arises from a scutate holdfast and very soon passes into a flat, expanded, fan-shaped lamina, which later becomes spUt into segments although no definite appendages are produced from this frond. The New Zealand D. willana is characterized, however, by lateral fronds proliferating from the stout stipe. The attachment disc bears a resemblance to the primary disc found in some members of the Laminariales, and it is formed in much the same way by tangential divisions of the outer layer or meristoderm. The growing region is the margin. Internally the thallus possesses small hyphae which anastomose and fuse with 195. 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 Chapman, V. J. (Valentine Jackson), 1910-. London, Macmillan; New York, St. Martin's Press
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, booksubjectalgae
